[Insight-users] Re: histogram : empty bins
Luis Ibanez
luis.ibanez at kitware.com
Fri, 23 Jan 2004 12:05:05 -0500
Hi David,
Thanks for pointing this out.
This sounds like a bug in the Histogram evaluation.
An entry has been logged into the bug traker with ID # 535.
http://www.itk.org/Bug/bug.php?op=show&bugid=535&pos=0
Regards,
Luis
------------------
David Llanos wrote:
> I have already gotten debugging and I have finally discovered of where
> the bug came in my program:
>
> when I compute the histogram of the green component of the image 10.jpg,
> I obtain the disordered values
>
> the correct values, obtained in MATLAB are:
>
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 2
> 0
> 12
> 33
> 88
> 189
> 446
> 838
> 1025
> 966
> 990
> 1151
> 1521
> 2070
> 2818
> 3566
> 3970
> 4042
> 3817
> 3263
> 2415
> 1888
> 1513
> 1328
> 1317
> 1280
> 1314
> 1359
> 1436
> 1570
> 1666
> 1760
> 1728
> 1776
> 1811
> 1793
> 1687
> 1630
> 1495
> 1313
> 1297
> 1259
> 1240
> 1184
> 1084
> 1080
> 1059
> 1006
> 1031
> 1044
> 1049
> 1074
> 1055
> 1124
> 1107
> 1156
> 1201
> 1313
> 1407
> 1257
> 1252
> 1200
> 1304
> 1340
> 1322
> 1240
> 1228
> 1107
> 1070
> 995
> 1029
> 1035
> 1022
> 1079
> 1052
> 1228
> 1254
> 1199
> 1225
> 1200
> 1244
> 1228
> 1180
> 1123
> 1097
> 1081
> 1046
> 1047
> 969
> 895
> 967
> 959
> 996
> 943
> 1053
> 1178
> 1266
> 1225
> 1134
> 967
> 876
> 900
> 906
> 894
> 882
> 868
> 918
> 988
> 939
> 1062
> 1032
> 1109
> 1025
> 1089
> 1047
> 1111
> 1084
> 971
> 955
> 891
> 909
> 942
> 1069
> 1183
> 1230
> 1165
> 1154
> 1018
> 988
> 1065
> 972
> 899
> 1010
> 967
> 983
> 1075
> 1179
> 1280
> 1107
> 1096
> 1015
> 990
> 971
> 1049
> 968
> 844
> 929
> 978
> 912
> 1048
> 1093
> 1133
> 1134
> 1123
> 1098
> 1134
> 1056
> 1031
> 947
> 1015
> 1115
> 1212
> 1339
> 1338
> 1401
> 1341
> 1266
> 1234
> 1259
> 1202
> 1192
> 1170
> 1146
> 1342
> 1520
> 1589
> 1454
> 1442
> 1511
> 1352
> 1358
> 1421
> 1428
> 1560
> 1721
> 1826
> 1944
> 1959
> 1838
> 1845
> 1826
> 1959
> 2088
> 2448
> 2543
> 2488
> 2598
> 2695
> 2779
> 2994
> 2984
> 3084
> 3816
> 4253
> 4712
> 5549
> 6365
> 7207
> 9448
> 16624
> 27997
> 42054
> 62072
> 86036
> 106521
> 131514
> 168615
> 167306
> 135628
> 95033
> 57209
> 29339
> 11533
> 2425
> 374
> 37
> 3
> 1
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> and with the next code, i obtainig this:
>
> unsigned long Histograma[255];
> for( unsigned int bin=0; bin < histogramSize; bin++ )
> Histograma[bin]=histogram->GetFrequency( bin, channel );
>
> [0] 2
> [1] 0
> [2] 12
> [3] 33
> [4] 88
> [5] 189
> [6] 446
> [7] 838
> [8] 1025
> [9] 0
> [10] 966
> [11] 990
> [12] 1151
> [13] 1521
> [14] 2070
> [15] 2818
> [16] 3566
> [17] 3970
> [18] 0
> [19] 4042
> [20] 3817
> [21] 3263
> [22] 2415
> [23] 1888
> [24] 1513
> [25] 1328
> [26] 1317
> [27] 0
> [28] 1280
> [29] 1314
> [30] 1359
> [31] 1436
> [32] 1570
> [33] 1666
> [34] 1760
> [35] 1728
> [36] 0
> [37] 1776
> [38] 1811
> [39] 1793
> [40] 1687
> [41] 1630
> [42] 1495
> [43] 1313
> [44] 1297
> [45] 0
> [46] 1259
> [47] 1240
> [48] 1184
> [49] 1084
> [50] 1080
> [51] 1059
> [52] 1006
> [53] 1031
> [54] 0
> [55] 1044
> [56] 1049
> [57] 1074
> [58] 1055
> [59] 1124
> [60] 1107
> [61] 1156
> [62] 1201
> [63] 0
> [64] 1313
> [65] 1407
> [66] 1257
> [67] 1252
> [68] 1200
> [69] 1304
> [70] 1340
> [71] 1322
> [72] 1240
> [73] 0
> [74] 1228
> [75] 1107
> [76] 1070
> [77] 995
> [78] 1029
> [79] 1035
> [80] 1022
> [81] 1079
> [82] 0
> [83] 1052
> [84] 1228
> [85] 1254
> [86] 1199
> [87] 1225
> [88] 1200
> [89] 1244
> [90] 1228
> [91] 0
> [92] 1180
> [93] 1123
> [94] 1097
> [95] 1081
> [96] 1046
> [97] 1047
> [98] 969
> [99] 895
> [100] 0
> [101] 967
> [102] 959
> [103] 996
> [104] 943
> [105] 1053
> [106] 1178
> [107] 1266
> [108] 1225
> [109] 0
> [110] 1134
> [111] 967
> [112] 876
> [113] 900
> [114] 906
> [115] 894
> [116] 882
> [117] 868
> [118] 0
> [119] 918
> [120] 988
> [121] 939
> [122] 1062
> [123] 1032
> [124] 1109
> [125] 1025
> [126] 1089
> [127] 0
> [128] 1047
> [129] 1111
> [130] 1084
> [131] 971
> [132] 955
> [133] 891
> [134] 909
> [135] 942
> [136] 1069
> [137] 0
> [138] 1183
> [139] 1230
> [140] 1165
> [141] 1154
> [142] 1018
> [143] 988
> [144] 1065
> [145] 972
> [146] 0
> [147] 899
> [148] 1010
> [149] 967
> [150] 983
> [151] 1075
> [152] 1179
> [153] 1280
> [154] 1107
> [155] 0
> [156] 1096
> [157] 1015
> [158] 990
> [159] 971
> [160] 1049
> [161] 968
> [162] 844
> [163] 929
> [164] 0
> [165] 978
> [166] 912
> [167] 1048
> [168] 1093
> [169] 1133
> [170] 1134
> [171] 1123
> [172] 1098
> [173] 0
> [174] 1134
> [175] 1056
> [176] 1031
> [177] 947
> [178] 1015
> [179] 1115
> [180] 1212
> [181] 1339
> [182] 0
> [183] 1338
> [184] 1401
> [185] 1341
> [186] 1266
> [187] 1234
> [188] 1259
> [189] 1202
> [190] 1192
> [191] 0
> [192] 1170
> [193] 1146
> [194] 1342
> [195] 1520
> [196] 1589
> [197] 1454
> [198] 1442
> [199] 1511
> [200] 0
> [201] 1352
> [202] 1358
> [203] 1421
> [204] 1428
> [205] 1560
> [206] 1721
> [207] 1826
> [208] 1944
> [209] 1959
> [210] 0
> [211] 1838
> [212] 1845
> [213] 1826
> [214] 1959
> [215] 2088
> [216] 2448
> [217] 2543
> [218] 2488
> [219] 0
> [220] 2598
> [221] 2695
> [222] 2779
> [223] 2994
> [224] 2984
> [225] 3084
> [226] 3816
> [227] 4253
> [228] 0
> [229] 4712
> [230] 5549
> [231] 6365
> [232] 7207
> [233] 9448
> [234] 16624
> [235] 27997
> [236] 42054
> [237] 0
> [238] 62072
> [239] 86036
> [240] 106521
> [241] 131514
> [242] 168615
> [243] 167306
> [244] 135628
> [245] 95033
> [246] 0
> [247] 57209
> [248] 29339
> [249] 11533
> [250] 2425
> [251] 374
> [252] 37
> [253] 3
> [254] 1
>
> it places me a 0 each 9 values. Do you know which the reason is?
>
>
> ------------------------------------------------------------------------
>