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3 Commits

Author SHA1 Message Date
Enrico Lumetti 8f7e073c4c Remove notebooks for the time being; they are still in history 2020-11-09 16:09:12 +01:00
Enrico Lumetti c4ae8836e6 PDF Page annotation analysis 2020-11-09 16:08:02 +01:00
Enrico Lumetti 1dac92b03b entries per sec analysis 2020-11-09 16:06:27 +01:00
8 changed files with 0 additions and 993 deletions

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from __future__ import print_function
from numpy import *
# evaluates cubic bezier at t, return point
def q(ctrlPoly, t):
return (1.0-t)**3 * ctrlPoly[0] + 3*(1.0-t)**2 * t * ctrlPoly[1] + 3*(1.0-t)* t**2 * ctrlPoly[2] + t**3 * ctrlPoly[3]
# evaluates cubic bezier first derivative at t, return point
def qprime(ctrlPoly, t):
return 3*(1.0-t)**2 * (ctrlPoly[1]-ctrlPoly[0]) + 6*(1.0-t) * t * (ctrlPoly[2]-ctrlPoly[1]) + 3*t**2 * (ctrlPoly[3]-ctrlPoly[2])
# evaluates cubic bezier second derivative at t, return point
def qprimeprime(ctrlPoly, t):
return 6*(1.0-t) * (ctrlPoly[2]-2*ctrlPoly[1]+ctrlPoly[0]) + 6*(t) * (ctrlPoly[3]-2*ctrlPoly[2]+ctrlPoly[1])

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import numpy as np
import csv
import matplotlib.pyplot as plt
def import_csv_data(filename):
stylus_x = []
stylus_y = []
stylus_pressure = []
time = []
with open(filename) as csv_fp:
reader = csv.reader(csv_fp)
next(reader) # skip header
for row in reader:
for i, v in enumerate([stylus_x, stylus_y]): #, stylus_pressure, time]):
v.append(float(row[i]))
stylus_pos = np.array([stylus_x, stylus_y])
time = np.array(time)
return time, stylus_pos

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x,y,pressure,time_usec
327.70943254927323,457.5467473524962,0.36800976800976803,13341423266
327.04769037001734,459.1733736762481,0.3916971916971917,13341433267
326.09184055553663,461.7295007564297,0.4129426129426129,13341438262
324.9521734690404,465.6798789712557,0.4358974358974359,13341448260
323.8860332913504,470.2111951588502,0.463003663003663,13341453253
322.9669469312728,475.6720121028744,0.4954822954822955,13341463263
322.08462402559826,482.0623298033283,0.525030525030525,13341468263
321.23906457432685,489.2659606656581,0.5470085470085471,13341478267
320.43026857745855,497.28290468986387,0.5641025641025641,13341483253
319.8420533070089,504.95128593040846,0.5711843711843712,13341493262
319.43765530857473,511.80635400907715,0.5758241758241758,13341498256
319.547945671784,515.7567322239032,0.5782661782661783,13341507264
320.31997821424926,516.4538577912255,0.5804639804639805,13341512275
322.04786057119514,512.9682299546142,0.5846153846153846,13341522420
324.7683561970249,505.2998487140696,0.5914529914529915,13341527280
328.3711747285291,494.4944024205749,0.6034188034188034,13341537276
332.67249889369236,481.48139183055974,0.6173382173382174,13341542263
336.97382305885554,468.4683812405446,0.6322344322344322,13341552267
341.01780304319703,457.08199697428137,0.6456654456654457,13341557287
343.8485890322361,450.69167927382756,0.6598290598290598,13341567268
344.95149266432924,450.9240544629349,0.6722832722832723,13341572419
343.811825577833,460.9161875945537,0.6825396825396826,13341582312
304.2543486400926,675.0499243570348,0.6991452991452991,13341617304
301.57061646866595,689.9219364599093,0.7137973137973138,13341627298
298.2619055723866,708.1633888048411,0.7299145299145299,13341632308
295.10024849371956,725.7077155824509,0.7555555555555555,13341642309
294.3282159512544,730.9361573373676,0.7892551892551892,13341647270
295.87228103618475,723.9649016641453,0.8178266178266178,13341657427
299.8794975661232,705.026323751891,0.8459096459096459,13341662307
306.0925213602478,677.0251134644478,0.8656898656898657,13341672414
313.9966640569153,642.8659606656581,0.8776556776556776,13341677324
322.56254893283864,608.8229954614221,0.8815628815628815,13341686308
330.9078530823433,578.8465960665658,0.8815628815628815,13341691312
337.56203832930527,558.3975794251135,0.8761904761904762,13341701310
341.9368894032747,549.2187594553707,0.8691086691086691,13341706456
343.51771794260816,552.8205748865355,0.8522588522588522,13341716309
342.1574701296933,569.3192133131619,0.8305250305250306,13341721310
338.2237805085611,597.4366111951589,0.802930402930403,13341731267
332.0842836232427,634.8490166414523,0.7763125763125763,13341736288
324.69482928821867,676.7927382753404,0.7587301587301587,13341746310
316.717159682745,720.1307110438729,0.7467643467643468,13341751319
309.4747591653334,758.2402420574887,0.7567765567765568,13341761311
303.5926064608367,789.6108925869894,0.7721611721611722,13341766301
299.62215338530143,809.943721633888,0.7892551892551892,13341776418
297.8942710283555,818.4254160363087,0.8136752136752137,13341781299
298.4824862988052,814.8236006051437,0.8344322344322345,13341791355
301.42356265105354,798.3249621785174,0.852014652014652,13341796307
306.8277904483099,770.6723146747353,0.8695970695970696,13341806489
314.5113524185587,733.2599092284418,0.8808302808302808,13341811286
323.9963236545597,690.7352496217852,0.8847374847374847,13341821318
334.65772543146,647.0487140695915,0.884981684981685,13341826271
344.84120230111995,608.5906202723147,0.8757020757020757,13341836311
352.92916226980293,581.518910741301,0.8605616605616606,13341850311
358.6274977022841,565.1364599092284,0.8398046398046398,13341851308
361.49504714572623,561.4184568835099,0.8207570207570207,13341855333
361.2009395105014,572.2239031770046,0.7980463980463981,13341865311
358.4069169758655,595.1128593040847,0.7716727716727717,13341870306
352.41447390815944,632.5252647503783,0.7492063492063492,13341880311
343.8485890322361,681.5564296520423,0.7267399267399267,13341885301
334.0327467066072,735.0027231467474,0.7142857142857143,13341895309
324.1433774721721,788.1004538577912,0.717948717948718,13341900305
315.72454641386116,833.8783661119516,0.7321123321123321,13341910330
309.40123225652724,868.8508320726172,0.746031746031746,13341915309
305.7248868162168,889.532223903177,0.7621489621489621,13341925376
304.73227354733297,895.1092284417549,0.7753357753357754,13341930261
306.49691935868196,885.3494704992436,0.7851037851037851,13341940453
310.9452973414576,861.0662632375189,0.7956043956043956,13341945270
318.00388058685365,824.8157337367625,0.8058608058608059,13341955322
327.56237873166083,778.8054462934947,0.8126984126984127,13341960315
338.8487592334139,728.8447806354009,0.800976800976801,13341970346
351.0909895496477,678.3031770045386,0.7831501831501831,13341975305
362.6347142322225,633.4547655068079,0.7511599511599512,13341985350
372.5608469210607,597.78517397882,0.7157509157509158,13341990416
379.39884944003813,575.8257186081695,0.6910866910866911,13342000315
382.85461415392996,569.3192133131619,0.6725274725274726,13342005346
382.7443237907206,579.7760968229954,0.6678876678876678,13342015312
379.06797835041016,606.9639939485628,0.6678876678876678,13342020307
372.78142764747935,648.7915279878971,0.67008547008547,13342029298
364.10525240834664,703.0511346444781,0.6708180708180708,13342034303
354.17911971950844,765.3276853252647,0.673992673992674,13342044314
343.811825577833,832.2517397881996,0.6727716727716728,13342049311
333.92245634339787,897.2006051437216,0.6896214896214896,13342059370
325.28304455866834,956.8048411497731,0.715018315018315,13342064312
318.99649385573747,1003.8608169440242,0.7357753357753358,13342074436
315.320148415427,1035.4638426626325,0.7604395604395604,13342079266
314.91575041699286,1048.593040847201,0.7697191697191698,13342089349
317.89359022364437,1042.2027231467473,0.7736263736263737,13342094311
324.2536678353814,1016.7576399394857,0.7829059829059829,13342104309
333.959219797801,973.3034795763994,0.7907203907203907,13342109305
346.78966538448446,915.5582450832072,0.796092796092796,13342119267
362.450896960207,846.5428139183056,0.7987789987789988,13342124454
380.0238281648909,773.925567322239,0.7987789987789988,13342134314
398.6628995472649,702.1216338880484,0.7992673992673993,13342139461
416.30935766075504,639.728895612708,0.7914529914529914,13342149298
431.89706232767134,590.1167927382753,0.7772893772893773,13342154306
443.5510773734554,558.3975794251135,0.7611721611721611,13342164267
450.7199509820608,546.6626323751891,0.7450549450549451,13342169350
452.85223133744086,556.190015128593,0.7372405372405373,13342179316
450.09497225720804,586.5149773071105,0.7365079365079366,13342184312
443.07315246621505,637.753706505295,0.7382173382173383,13342193328
432.52204105252406,706.5367624810892,0.7391941391941392,13342198308
420.16952037308096,786.9385779122541,0.7396825396825397,13342208340
406.787622970351,874.5440242057489,0.7450549450549451,13342213313
394.5821561085203,957.8505295007565,0.7565323565323565,13342223406
384.32515233005415,1032.3267776096823,0.76996336996337,13342228312
377.229805630255,1089.2586989409986,0.7836385836385836,13342238315
373.77404091636316,1126.671104387292,0.7956043956043956,13342243440
374.06814855158797,1141.0783661119515,0.8075702075702076,13342253311
378.07536508152634,1132.3642965204235,0.8214896214896215,13342258383
385.7589270517752,1101.6907715582452,0.8378510378510379,13342268290
397.0085440991252,1049.871104387292,0.8515262515262515,13342273325
411.4933451339483,983.1794251134645,0.8556776556776556,13342283297
429.06627633863224,905.7984871406959,0.8556776556776556,13342288288
448.14650917384347,828.0689863842663,0.8241758241758241,13342298297
467.66790346189197,755.335552193646,0.778998778998779,13342303281
485.0937808489635,696.6608169440242,0.705982905982906,13342313370
499.0271300677401,655.7627836611196,0.6344322344322344,13342318245
507.5194880348572,637.1727685325264,0.5975579975579975,13342328257
509.9458760254621,641.4717095310136,0.581929181929182,13342333288
506.60040167477956,668.0786686838125,0.5982905982905983,13342343294
497.9242264356469,716.0641452344931,0.6161172161172161,13342348315
485.53494230180075,781.0130105900151,0.638095238095238,13342358345
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455.42567314565815,945.8832072617247,0.705006105006105,13342373416
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415.4637982094836,1217.8783661119517,0.8234432234432234,13342402308
414.6182387582122,1238.327382753404,0.8324786324786325,13342407319
417.44902474725126,1236.0036308623298,0.8407814407814408,13342417305
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520.9381488919903,780.5482602118003,0.6879120879120879,13342467297
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552.5547196786601,710.8357034795764,0.652991452991453,13342522397
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538.3272628246588,792.8641452344932,0.6927960927960928,13342524293
527.4820437757429,856.7673222390317,0.7142857142857143,13342527322
514.3942540082377,937.1691376701966,0.7440781440781441,13342537266
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487.26282465874664,1195.2217851739788,0.843956043956044,13342586303
500.1667971542363,1133.758547655068,0.8449328449328449,13342596316
516.3059536371992,1058.7013615733738,0.8300366300366301,13342601338
534.7244442931545,975.9757942511346,0.8012210012210013,13342611316
554.7605269428465,893.2502269288956,0.7714285714285715,13342616314
574.0613405044763,821.0977307110438,0.7326007326007326,13342626316
591.2666371651292,763.0039334341906,0.7013431013431013,13342631310
603.6559212989754,728.7285930408472,0.693040293040293,13342641293
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610.6777410899683,736.3969742813919,0.693040293040293,13342656373
605.0529325662934,779.1540090771558,0.7072039072039072,13342661318
595.2370902406644,841.0819969742814,0.7128205128205128,13342671315
582.2963542907717,918.6953101361573,0.715018315018315,13342676322
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555.9369574837458,1087.6320726172466,0.7296703296703296,13342691308
545.2387922524424,1165.3615733736763,0.7509157509157509,13342701305
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805.2667052456003,775.900756429652,0.5377289377289377,13342959312
810.8179868604691,784.6148260211801,0.5111111111111111,13342969315
809.9724274091976,814.3588502269289,0.5238095238095238,13342974319
803.9064574326854,862.3443267776097,0.575091575091575,13342984318
793.7597440174286,926.2475037821482,0.6371184371184371,13342989318
781.7013309732104,1000.7237518910741,0.7040293040293041,13342999313
768.6503046601083,1082.4036308623297,0.7645909645909645,13343004304
756.9227627055179,1163.6187594553708,0.8075702075702076,13343014303
747.1436838342921,1240.1863842662633,0.841025641025641,13343019254
740.5630254961364,1304.4381240544628,0.8517704517704517,13343029277
737.8057664159036,1353.469288956127,0.8527472527472527,13343034308
739.1292507744154,1383.5618759455372,0.8312576312576313,13343044329
744.6805323892842,1394.0187594553706,0.7819291819291819,13343049309
754.496374714913,1384.9561270801814,0.765079365079365,13343058360
1 x y pressure time_usec
2 327.70943254927323 457.5467473524962 0.36800976800976803 13341423266
3 327.04769037001734 459.1733736762481 0.3916971916971917 13341433267
4 326.09184055553663 461.7295007564297 0.4129426129426129 13341438262
5 324.9521734690404 465.6798789712557 0.4358974358974359 13341448260
6 323.8860332913504 470.2111951588502 0.463003663003663 13341453253
7 322.9669469312728 475.6720121028744 0.4954822954822955 13341463263
8 322.08462402559826 482.0623298033283 0.525030525030525 13341468263
9 321.23906457432685 489.2659606656581 0.5470085470085471 13341478267
10 320.43026857745855 497.28290468986387 0.5641025641025641 13341483253
11 319.8420533070089 504.95128593040846 0.5711843711843712 13341493262
12 319.43765530857473 511.80635400907715 0.5758241758241758 13341498256
13 319.547945671784 515.7567322239032 0.5782661782661783 13341507264
14 320.31997821424926 516.4538577912255 0.5804639804639805 13341512275
15 322.04786057119514 512.9682299546142 0.5846153846153846 13341522420
16 324.7683561970249 505.2998487140696 0.5914529914529915 13341527280
17 328.3711747285291 494.4944024205749 0.6034188034188034 13341537276
18 332.67249889369236 481.48139183055974 0.6173382173382174 13341542263
19 336.97382305885554 468.4683812405446 0.6322344322344322 13341552267
20 341.01780304319703 457.08199697428137 0.6456654456654457 13341557287
21 343.8485890322361 450.69167927382756 0.6598290598290598 13341567268
22 344.95149266432924 450.9240544629349 0.6722832722832723 13341572419
23 343.811825577833 460.9161875945537 0.6825396825396826 13341582312
24 304.2543486400926 675.0499243570348 0.6991452991452991 13341617304
25 301.57061646866595 689.9219364599093 0.7137973137973138 13341627298
26 298.2619055723866 708.1633888048411 0.7299145299145299 13341632308
27 295.10024849371956 725.7077155824509 0.7555555555555555 13341642309
28 294.3282159512544 730.9361573373676 0.7892551892551892 13341647270
29 295.87228103618475 723.9649016641453 0.8178266178266178 13341657427
30 299.8794975661232 705.026323751891 0.8459096459096459 13341662307
31 306.0925213602478 677.0251134644478 0.8656898656898657 13341672414
32 313.9966640569153 642.8659606656581 0.8776556776556776 13341677324
33 322.56254893283864 608.8229954614221 0.8815628815628815 13341686308
34 330.9078530823433 578.8465960665658 0.8815628815628815 13341691312
35 337.56203832930527 558.3975794251135 0.8761904761904762 13341701310
36 341.9368894032747 549.2187594553707 0.8691086691086691 13341706456
37 343.51771794260816 552.8205748865355 0.8522588522588522 13341716309
38 342.1574701296933 569.3192133131619 0.8305250305250306 13341721310
39 338.2237805085611 597.4366111951589 0.802930402930403 13341731267
40 332.0842836232427 634.8490166414523 0.7763125763125763 13341736288
41 324.69482928821867 676.7927382753404 0.7587301587301587 13341746310
42 316.717159682745 720.1307110438729 0.7467643467643468 13341751319
43 309.4747591653334 758.2402420574887 0.7567765567765568 13341761311
44 303.5926064608367 789.6108925869894 0.7721611721611722 13341766301
45 299.62215338530143 809.943721633888 0.7892551892551892 13341776418
46 297.8942710283555 818.4254160363087 0.8136752136752137 13341781299
47 298.4824862988052 814.8236006051437 0.8344322344322345 13341791355
48 301.42356265105354 798.3249621785174 0.852014652014652 13341796307
49 306.8277904483099 770.6723146747353 0.8695970695970696 13341806489
50 314.5113524185587 733.2599092284418 0.8808302808302808 13341811286
51 323.9963236545597 690.7352496217852 0.8847374847374847 13341821318
52 334.65772543146 647.0487140695915 0.884981684981685 13341826271
53 344.84120230111995 608.5906202723147 0.8757020757020757 13341836311
54 352.92916226980293 581.518910741301 0.8605616605616606 13341850311
55 358.6274977022841 565.1364599092284 0.8398046398046398 13341851308
56 361.49504714572623 561.4184568835099 0.8207570207570207 13341855333
57 361.2009395105014 572.2239031770046 0.7980463980463981 13341865311
58 358.4069169758655 595.1128593040847 0.7716727716727717 13341870306
59 352.41447390815944 632.5252647503783 0.7492063492063492 13341880311
60 343.8485890322361 681.5564296520423 0.7267399267399267 13341885301
61 334.0327467066072 735.0027231467474 0.7142857142857143 13341895309
62 324.1433774721721 788.1004538577912 0.717948717948718 13341900305
63 315.72454641386116 833.8783661119516 0.7321123321123321 13341910330
64 309.40123225652724 868.8508320726172 0.746031746031746 13341915309
65 305.7248868162168 889.532223903177 0.7621489621489621 13341925376
66 304.73227354733297 895.1092284417549 0.7753357753357754 13341930261
67 306.49691935868196 885.3494704992436 0.7851037851037851 13341940453
68 310.9452973414576 861.0662632375189 0.7956043956043956 13341945270
69 318.00388058685365 824.8157337367625 0.8058608058608059 13341955322
70 327.56237873166083 778.8054462934947 0.8126984126984127 13341960315
71 338.8487592334139 728.8447806354009 0.800976800976801 13341970346
72 351.0909895496477 678.3031770045386 0.7831501831501831 13341975305
73 362.6347142322225 633.4547655068079 0.7511599511599512 13341985350
74 372.5608469210607 597.78517397882 0.7157509157509158 13341990416
75 379.39884944003813 575.8257186081695 0.6910866910866911 13342000315
76 382.85461415392996 569.3192133131619 0.6725274725274726 13342005346
77 382.7443237907206 579.7760968229954 0.6678876678876678 13342015312
78 379.06797835041016 606.9639939485628 0.6678876678876678 13342020307
79 372.78142764747935 648.7915279878971 0.67008547008547 13342029298
80 364.10525240834664 703.0511346444781 0.6708180708180708 13342034303
81 354.17911971950844 765.3276853252647 0.673992673992674 13342044314
82 343.811825577833 832.2517397881996 0.6727716727716728 13342049311
83 333.92245634339787 897.2006051437216 0.6896214896214896 13342059370
84 325.28304455866834 956.8048411497731 0.715018315018315 13342064312
85 318.99649385573747 1003.8608169440242 0.7357753357753358 13342074436
86 315.320148415427 1035.4638426626325 0.7604395604395604 13342079266
87 314.91575041699286 1048.593040847201 0.7697191697191698 13342089349
88 317.89359022364437 1042.2027231467473 0.7736263736263737 13342094311
89 324.2536678353814 1016.7576399394857 0.7829059829059829 13342104309
90 333.959219797801 973.3034795763994 0.7907203907203907 13342109305
91 346.78966538448446 915.5582450832072 0.796092796092796 13342119267
92 362.450896960207 846.5428139183056 0.7987789987789988 13342124454
93 380.0238281648909 773.925567322239 0.7987789987789988 13342134314
94 398.6628995472649 702.1216338880484 0.7992673992673993 13342139461
95 416.30935766075504 639.728895612708 0.7914529914529914 13342149298
96 431.89706232767134 590.1167927382753 0.7772893772893773 13342154306
97 443.5510773734554 558.3975794251135 0.7611721611721611 13342164267
98 450.7199509820608 546.6626323751891 0.7450549450549451 13342169350
99 452.85223133744086 556.190015128593 0.7372405372405373 13342179316
100 450.09497225720804 586.5149773071105 0.7365079365079366 13342184312
101 443.07315246621505 637.753706505295 0.7382173382173383 13342193328
102 432.52204105252406 706.5367624810892 0.7391941391941392 13342198308
103 420.16952037308096 786.9385779122541 0.7396825396825397 13342208340
104 406.787622970351 874.5440242057489 0.7450549450549451 13342213313
105 394.5821561085203 957.8505295007565 0.7565323565323565 13342223406
106 384.32515233005415 1032.3267776096823 0.76996336996337 13342228312
107 377.229805630255 1089.2586989409986 0.7836385836385836 13342238315
108 373.77404091636316 1126.671104387292 0.7956043956043956 13342243440
109 374.06814855158797 1141.0783661119515 0.8075702075702076 13342253311
110 378.07536508152634 1132.3642965204235 0.8214896214896215 13342258383
111 385.7589270517752 1101.6907715582452 0.8378510378510379 13342268290
112 397.0085440991252 1049.871104387292 0.8515262515262515 13342273325
113 411.4933451339483 983.1794251134645 0.8556776556776556 13342283297
114 429.06627633863224 905.7984871406959 0.8556776556776556 13342288288
115 448.14650917384347 828.0689863842663 0.8241758241758241 13342298297
116 467.66790346189197 755.335552193646 0.778998778998779 13342303281
117 485.0937808489635 696.6608169440242 0.705982905982906 13342313370
118 499.0271300677401 655.7627836611196 0.6344322344322344 13342318245
119 507.5194880348572 637.1727685325264 0.5975579975579975 13342328257
120 509.9458760254621 641.4717095310136 0.581929181929182 13342333288
121 506.60040167477956 668.0786686838125 0.5982905982905983 13342343294
122 497.9242264356469 716.0641452344931 0.6161172161172161 13342348315
123 485.53494230180075 781.0130105900151 0.638095238095238 13342358345
124 470.75603363175276 859.7881996974281 0.663980463980464 13342363306
125 455.42567314565815 945.8832072617247 0.705006105006105 13342373416
126 440.8673452020288 1032.907715582451 0.7496947496947497 13342377268
127 428.99274942982606 1111.1019667170954 0.7882783882783883 13342387310
128 420.2430472818872 1175.1213313161877 0.8126984126984127 13342392288
129 415.4637982094836 1217.8783661119517 0.8234432234432234 13342402308
130 414.6182387582122 1238.327382753404 0.8324786324786325 13342407319
131 417.44902474725126 1236.0036308623298 0.8407814407814408 13342417305
132 424.02968308540693 1210.6747352496218 0.8512820512820513 13342422365
133 434.1028695918576 1164.4320726172466 0.8564102564102564 13342432350
134 447.63182081220003 1100.2965204236007 0.8505494505494505 13342437297
135 464.06508493038774 1022.7993948562784 0.8273504273504273 13342447267
136 482.7041563127617 938.0986384266263 0.7887667887667887 13342452304
137 502.04173332879463 856.1863842662632 0.736996336996337 13342462355
138 520.9381488919903 780.5482602118003 0.6879120879120879 13342467297
139 537.0405419205501 722.2220877458396 0.6432234432234433 13342477326
140 549.3930625999932 683.647806354009 0.6180708180708181 13342482304
141 556.1207747557613 669.2405446293494 0.6188034188034188 13342492332
142 556.7825169350172 679.348865355522 0.6273504273504273 13342497317
143 552.5547196786601 710.8357034795764 0.652991452991453 13342522397
144 545.6064267964734 751.5013615733736 0.676923076923077 13342523321
145 538.3272628246588 792.8641452344932 0.6927960927960928 13342524293
146 527.4820437757429 856.7673222390317 0.7142857142857143 13342527322
147 514.3942540082377 937.1691376701966 0.7440781440781441 13342537266
148 498.3653878884842 1039.995158850227 0.7733821733821734 13342541322
149 482.9615004935834 1143.7506807866869 0.7985347985347986 13342551268
150 473.1088947135514 1219.2726172465962 0.8168498168498168 13342556358
151 469.35902236443474 1258.6602118003025 0.8234432234432234 13342566319
152 471.71188344623346 1260.054462934947 0.8288156288156289 13342571311
153 477.70432651393946 1239.0245083207262 0.8356532356532357 13342581319
154 487.26282465874664 1195.2217851739788 0.843956043956044 13342586303
155 500.1667971542363 1133.758547655068 0.8449328449328449 13342596316
156 516.3059536371992 1058.7013615733738 0.8300366300366301 13342601338
157 534.7244442931545 975.9757942511346 0.8012210012210013 13342611316
158 554.7605269428465 893.2502269288956 0.7714285714285715 13342616314
159 574.0613405044763 821.0977307110438 0.7326007326007326 13342626316
160 591.2666371651292 763.0039334341906 0.7013431013431013 13342631310
161 603.6559212989754 728.7285930408472 0.693040293040293 13342641293
162 610.3836334547435 719.5497730711044 0.6862026862026862 13342646315
163 610.6777410899683 736.3969742813919 0.693040293040293 13342656373
164 605.0529325662934 779.1540090771558 0.7072039072039072 13342661318
165 595.2370902406644 841.0819969742814 0.7128205128205128 13342671315
166 582.2963542907717 918.6953101361573 0.715018315018315 13342676322
167 568.9144568880416 1002.6989409984872 0.7194139194139194 13342686302
168 555.9369574837458 1087.6320726172466 0.7296703296703296 13342691308
169 545.2387922524424 1165.3615733736763 0.7509157509157509 13342701305
170 537.371413010178 1229.8456883509834 0.7716727716727717 13342706380
171 532.8127446641931 1275.3912254160364 0.7909645909645909 13342715268
172 531.8936583041154 1300.3715582450832 0.8075702075702076 13342720310
173 534.5773904755421 1302.6953101361573 0.8158730158730159 13342730323
174 540.9374680872792 1283.2919818456883 0.827106227106227 13342735300
175 550.7900738673112 1243.3234493192133 0.8368742368742369 13342745311
176 563.9513905436226 1185.2296520423602 0.8422466422466423 13342750308
177 580.4581815706165 1113.3095310136157 0.8454212454212454 13342760264
178 599.9428124042619 1031.7458396369138 0.8461538461538461 13342765320
179 621.3391428668687 951.2278366111951 0.8310134310134311 13342775326
180 643.7280865983593 875.1249621785174 0.8036630036630037 13342780312
181 663.4332981584232 816.1016641452345 0.7438339438339439 13342790325
182 678.8739490077271 778.4568835098336 0.6852258852258852 13342795313
183 687.7707049732784 766.4895612708018 0.6427350427350428 13342805276
184 689.6088776934337 781.5939485627837 0.611965811965812 13342810273
185 685.491370800286 819.9358547655069 0.6144078144078144 13342820313
186 676.4107975627192 878.4944024205749 0.6158730158730159 13342825323
187 664.7935459713382 949.1364599092284 0.6297924297924298 13342835327
188 651.8528100214453 1027.7954614220878 0.6525030525030525 13342840383
189 639.8311604316302 1106.2220877458396 0.6998778998778998 13342850316
190 629.5741566531641 1179.5364599092284 0.7516483516483516 13342855320
191 622.4788099533649 1241.115885022693 0.7914529914529914 13342865317
192 618.9495183306668 1287.1261724659607 0.8266178266178266 13342870306
193 619.5744970555196 1310.9446293494705 0.842979242979243 13342879268
194 624.5007999455356 1311.525567322239 0.8578754578754578 13342884305
195 633.6549000919086 1288.0556732223904 0.873992673992674 13342894318
196 647.0735609490417 1241.5806354009078 0.8886446886446886 13342899308
197 664.3523845185009 1178.2583963691377 0.8986568986568987 13342909263
198 684.8296286210301 1101.8069591527988 0.9037851037851038 13342914264
199 707.6229703509548 1021.753706505295 0.8964590964590965 13342924326
200 731.7030329849882 943.3270801815431 0.873992673992674 13342929322
201 754.8640092589441 875.705900151286 0.8068376068376069 13342939295
202 776.3706300847601 822.4919818456883 0.7152625152625153 13342944339
203 793.4656363822038 788.6813918305597 0.6205128205128205 13342954311
204 805.2667052456003 775.900756429652 0.5377289377289377 13342959312
205 810.8179868604691 784.6148260211801 0.5111111111111111 13342969315
206 809.9724274091976 814.3588502269289 0.5238095238095238 13342974319
207 803.9064574326854 862.3443267776097 0.575091575091575 13342984318
208 793.7597440174286 926.2475037821482 0.6371184371184371 13342989318
209 781.7013309732104 1000.7237518910741 0.7040293040293041 13342999313
210 768.6503046601083 1082.4036308623297 0.7645909645909645 13343004304
211 756.9227627055179 1163.6187594553708 0.8075702075702076 13343014303
212 747.1436838342921 1240.1863842662633 0.841025641025641 13343019254
213 740.5630254961364 1304.4381240544628 0.8517704517704517 13343029277
214 737.8057664159036 1353.469288956127 0.8527472527472527 13343034308
215 739.1292507744154 1383.5618759455372 0.8312576312576313 13343044329
216 744.6805323892842 1394.0187594553706 0.7819291819291819 13343049309
217 754.496374714913 1384.9561270801814 0.765079365079365 13343058360

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@ -1,162 +0,0 @@
""" Python implementation of
Algorithm for Automatically Fitting Digitized Curves
by Philip J. Schneider
"Graphics Gems", Academic Press, 1990
"""
from __future__ import print_function
from numpy import *
import bezier
# Fit one (ore more) Bezier curves to a set of points
def fitCurve(points, maxError):
leftTangent = normalize(points[1] - points[0])
rightTangent = normalize(points[-2] - points[-1])
return fitCubic(points, leftTangent, rightTangent, maxError)
def fitCubic(points, leftTangent, rightTangent, error):
# Use heuristic if region only has two points in it
if (len(points) == 2):
dist = linalg.norm(points[0] - points[1]) / 3.0
bezCurve = [points[0], points[0] + leftTangent * dist, points[1] + rightTangent * dist, points[1]]
return [bezCurve]
# Parameterize points, and attempt to fit curve
u = chordLengthParameterize(points)
bezCurve = generateBezier(points, u, leftTangent, rightTangent)
# Find max deviation of points to fitted curve
maxError, splitPoint = computeMaxError(points, bezCurve, u)
if maxError < error:
return [bezCurve]
# If error not too large, try some reparameterization and iteration
if maxError < error**2:
for i in range(20):
uPrime = reparameterize(bezCurve, points, u)
bezCurve = generateBezier(points, uPrime, leftTangent, rightTangent)
maxError, splitPoint = computeMaxError(points, bezCurve, uPrime)
if maxError < error:
return [bezCurve]
u = uPrime
# Fitting failed -- split at max error point and fit recursively
beziers = []
centerTangent = normalize(points[splitPoint-1] - points[splitPoint+1])
beziers += fitCubic(points[:splitPoint+1], leftTangent, centerTangent, error)
beziers += fitCubic(points[splitPoint:], -centerTangent, rightTangent, error)
return beziers
def generateBezier(points, parameters, leftTangent, rightTangent):
bezCurve = [points[0], None, None, points[-1]]
# compute the A's
A = zeros((len(parameters), 2, 2))
for i, u in enumerate(parameters):
A[i][0] = leftTangent * 3*(1-u)**2 * u
A[i][1] = rightTangent * 3*(1-u) * u**2
# Create the C and X matrices
C = zeros((2, 2))
X = zeros(2)
for i, (point, u) in enumerate(zip(points, parameters)):
C[0][0] += dot(A[i][0], A[i][0])
C[0][1] += dot(A[i][0], A[i][1])
C[1][0] += dot(A[i][0], A[i][1])
C[1][1] += dot(A[i][1], A[i][1])
tmp = point - bezier.q([points[0], points[0], points[-1], points[-1]], u)
X[0] += dot(A[i][0], tmp)
X[1] += dot(A[i][1], tmp)
# Compute the determinants of C and X
det_C0_C1 = C[0][0] * C[1][1] - C[1][0] * C[0][1]
det_C0_X = C[0][0] * X[1] - C[1][0] * X[0]
det_X_C1 = X[0] * C[1][1] - X[1] * C[0][1]
# Finally, derive alpha values
alpha_l = 0.0 if det_C0_C1 == 0 else det_X_C1 / det_C0_C1
alpha_r = 0.0 if det_C0_C1 == 0 else det_C0_X / det_C0_C1
# If alpha negative, use the Wu/Barsky heuristic (see text) */
# (if alpha is 0, you get coincident control points that lead to
# divide by zero in any subsequent NewtonRaphsonRootFind() call. */
segLength = linalg.norm(points[0] - points[-1])
epsilon = 1.0e-6 * segLength
if alpha_l < epsilon or alpha_r < epsilon:
# fall back on standard (probably inaccurate) formula, and subdivide further if needed.
bezCurve[1] = bezCurve[0] + leftTangent * (segLength / 3.0)
bezCurve[2] = bezCurve[3] + rightTangent * (segLength / 3.0)
else:
# First and last control points of the Bezier curve are
# positioned exactly at the first and last data points
# Control points 1 and 2 are positioned an alpha distance out
# on the tangent vectors, left and right, respectively
bezCurve[1] = bezCurve[0] + leftTangent * alpha_l
bezCurve[2] = bezCurve[3] + rightTangent * alpha_r
return bezCurve
def reparameterize(bezier, points, parameters):
return [newtonRaphsonRootFind(bezier, point, u) for point, u in zip(points, parameters)]
def newtonRaphsonRootFind(bez, point, u):
"""
Newton's root finding algorithm calculates f(x)=0 by reiterating
x_n+1 = x_n - f(x_n)/f'(x_n)
We are trying to find curve parameter u for some point p that minimizes
the distance from that point to the curve. Distance point to curve is d=q(u)-p.
At minimum distance the point is perpendicular to the curve.
We are solving
f = q(u)-p * q'(u) = 0
with
f' = q'(u) * q'(u) + q(u)-p * q''(u)
gives
u_n+1 = u_n - |q(u_n)-p * q'(u_n)| / |q'(u_n)**2 + q(u_n)-p * q''(u_n)|
"""
d = bezier.q(bez, u)-point
numerator = (d * bezier.qprime(bez, u)).sum()
denominator = (bezier.qprime(bez, u)**2 + d * bezier.qprimeprime(bez, u)).sum()
if denominator == 0.0:
return u
else:
return u - numerator/denominator
def chordLengthParameterize(points):
u = [0.0]
for i in range(1, len(points)):
u.append(u[i-1] + linalg.norm(points[i] - points[i-1]))
for i, _ in enumerate(u):
u[i] = u[i] / u[-1]
return u
def computeMaxError(points, bez, parameters):
maxDist = 0.0
splitPoint = len(points)/2
for i, (point, u) in enumerate(zip(points, parameters)):
dist = linalg.norm(bezier.q(bez, u)-point)**2
if dist > maxDist:
maxDist = dist
splitPoint = i
return maxDist, splitPoint
def normalize(v):
return v / linalg.norm(v)

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@ -1,205 +0,0 @@
x,y,pressure,time_usec
18.822888654389487,97.13282904689864,0.10256410256410256,11399014806
18.492017564761547,95.62239031770045,0.1111111111111111,11399024788
18.01409265752119,93.53101361573374,0.12087912087912088,11399029781
17.572931204683936,91.0910741301059,0.13333333333333333,11399039790
17.2788235694591,88.99969742813919,0.14481074481074482,11399044778
17.168533206249787,87.60544629349471,0.15873015873015872,11399054783
17.09500629744358,86.90832072617246,0.1728937728937729,11399059831
17.09500629744358,86.90832072617246,0.1838827838827839,11399069794
17.20529666065289,87.83782148260212,0.19462759462759463,11399074789
17.42587738707152,89.58063540090771,0.20415140415140415,11399084790
17.75674847669946,92.25295007564297,0.21343101343101342,11399089814
18.197909929536713,95.50620272314674,0.22271062271062272,11399099785
18.74936174558328,99.57276853252648,0.231990231990232,11399104778
19.374340470436056,104.33645990922844,0.24151404151404152,11399114830
20.072846104095042,109.56490166414524,0.252014652014652,11399119826
20.80811519215713,115.25809379727686,0.26544566544566545,11399129782
21.543384280219218,121.4160363086233,0.28034188034188035,11399133889
22.352180277087516,127.92254160363086,0.29572649572649573,11399143784
23.308030091568234,134.89379727685326,0.30964590964590966,11399148872
24.41093372366137,142.32980332829047,0.3189255189255189,11399158805
25.624127718963816,150.46293494704992,0.32576312576312577,11399163785
26.874085168669367,159.2931921331316,0.3286935286935287,11399173825
28.23433298158423,168.47201210287443,0.3308913308913309,11399178841
29.70487115770841,177.65083207261725,0.3316239316239316,11399188784
31.285699697041903,186.94583963691377,0.3326007326007326,11399193778
32.9400551451816,196.2408472012103,0.33357753357753356,11399203784
34.63117404772441,205.6520423600605,0.3343101343101343,11399208778
36.35905640467032,215.64417549167928,0.3347985347985348,11399218784
38.12370221601933,225.75249621785173,0.335042735042735,11399223785
39.81482111856214,236.32556732223904,0.335042735042735,11399233791
41.50594002110495,247.01482602118003,0.33528693528693526,11399238781
43.01324165163223,257.82027231467475,0.33577533577533575,11399248924
44.33672601014399,268.39334341906203,0.33601953601953605,11399253784
45.54992000544644,278.7340393343419,0.33650793650793653,11399263780
46.61606018313647,288.49379727685323,0.336996336996337,11399268789
47.7189638152296,298.1373676248109,0.33724053724053726,11399278784
48.85863090172584,307.7809379727685,0.337973137973138,11399283935
50.10858835143139,317.42450832072615,0.3384615384615385,11399293798
51.43207270994315,327.41664145234495,0.3391941391941392,11399298856
52.86584743166423,337.8735249621785,0.3396825396825397,11399307786
54.37314906219151,348.6789712556732,0.3401709401709402,11399312775
55.84368723831569,359.94916792738275,0.3409035409035409,11399322815
57.27746196003676,371.4517397881997,0.3413919413919414,11399327786
58.527419409742315,382.7219364599092,0.3418803418803419,11399337784
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61.505259216393775,413.27927382753404,0.34383394383394383,11399357798
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63.04932430132416,429.1969742813918,0.347008547008547,11399372781
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66.39479865200667,463.58850226928894,0.3775335775335775,11399427783
66.83596010484392,468.0036308623298,0.38168498168498166,11399432864
67.31388501208428,471.6054462934947,0.38412698412698415,11399442791
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68.269734826565,476.13676248108925,0.3855921855921856,11399457805
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71.50491881403819,461.0323751891074,0.3882783882783883,11399501785
72.09313408448786,454.64205748865356,0.38925518925518926,11399506781
72.75487626374374,447.67080181543116,0.38998778998779,11399516913
73.41661844299962,439.7700453857791,0.3904761904761905,11399521779
74.11512407665862,431.17216338880485,0.3904761904761905,11399531906
74.8871566191238,421.5285930408472,0.38974358974358975,11399536796
75.6959526159921,410.8393343419062,0.38852258852258853,11399546785
76.61503897606971,399.22057488653553,0.3882783882783883,11399551783
77.75470606256596,386.6723146747353,0.38852258852258853,11399561814
79.0046635122715,373.5431164901664,0.38974358974358975,11399566854
80.43843823399258,359.83298033282904,0.3912087912087912,11399576782
82.01926677332607,345.8904689863843,0.3921855921855922,11399581909
83.71038567586888,332.1803328290469,0.3924297924297924,11399591788
85.43826803281479,318.81875945537064,0.39267399267399267,11399596776
87.12938693535759,305.6895612708018,0.39316239316239315,11399606786
88.7837423834973,292.7927382753404,0.3934065934065934,11399611786
90.29104401402458,279.895915279879,0.3934065934065934,11399621783
91.68805528134254,266.99909228441754,0.3934065934065934,11399626785
93.0115396398543,254.45083207261726,0.3934065934065934,11399636784
94.29826054396297,242.01875945537066,0.39316239316239315,11399641782
95.51145453926542,229.81906202723147,0.39316239316239315,11399650791
96.76141198897096,217.9679273827534,0.39316239316239315,11399655781
97.90107907546721,206.69773071104387,0.3934065934065934,11399665890
99.04074616196344,196.1246596066566,0.3938949938949939,11399670781
100.07012288525037,186.48108925869894,0.39487179487179486,11399680781
100.95244579092487,177.41845688350983,0.3963369963369963,11399685800
101.68771487898697,169.16913767019668,0.39755799755799753,11399695788
102.20240324063043,161.73313161875944,0.3987789987789988,11399700837
102.53327433025837,154.87806354009078,0.4,11399710783
102.8273819654832,148.72012102874433,0.40073260073260075,11399715936
103.04796269190183,143.25930408472013,0.4014652014652015,11399725809
103.19501650951425,138.14704992435705,0.4021978021978022,11399730776
103.34207032712666,133.26717095310136,0.40293040293040294,11399740781
103.37883378152976,128.96822995461423,0.40341880341880343,11399745774
103.41559723593288,125.0178517397882,0.4039072039072039,11399755784
103.45236069033598,121.532223903177,0.40415140415140416,11399760776
103.48912414473908,118.51134644478064,0.4043956043956044,11399770786
103.6361779623515,115.72284417549167,0.4043956043956044,11399775776
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217.38230588555672,210.5319213313162,0.5025641025641026,11400431783
218.0072846104095,196.2408472012103,0.5042735042735043,11400441782
218.48520951764985,182.1821482602118,0.5057387057387057,11400446781
218.8160806072778,169.28532526475038,0.5069597069597069,11400456789
219.07342478809954,157.78275340393344,0.5079365079365079,11400461784
219.18371515130886,147.79062027231467,0.5089133089133089,11400471781
219.22047860571195,139.4251134644478,0.5096459096459096,11400476780
219.14695169690575,132.33767019667172,0.5096459096459096,11400486793
218.99989787929331,126.41210287443268,0.5089133089133089,11400491781
218.8160806072778,121.532223903177,0.503052503052503,11400500805
218.59549988085917,117.8142208774584,0.49230769230769234,11400506774
218.41168260884365,114.90953101361573,0.46007326007326005,11400515804
218.26462879123125,112.93434190620272,0.4073260073260073,11400520780
218.15433842802193,111.65627836611195,0.3873015873015873,11400530789
1 x y pressure time_usec
2 18.822888654389487 97.13282904689864 0.10256410256410256 11399014806
3 18.492017564761547 95.62239031770045 0.1111111111111111 11399024788
4 18.01409265752119 93.53101361573374 0.12087912087912088 11399029781
5 17.572931204683936 91.0910741301059 0.13333333333333333 11399039790
6 17.2788235694591 88.99969742813919 0.14481074481074482 11399044778
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