画像計測の例

画像データから特徴量を計算する事は、様々な画像処理においても重要な機能(役割)と言えます。
特徴量を計算するには、対象物を識別する処理の必要性が生じます。      2009/02/24

対象物の識別における
  第一ステップは、背景部分と、対象物の分離(二値化等の処理)です。
  第二ステップは、個々の対象物を識別する符号付け(ラベリング処理)です。
  第三ステップは、識別された対象物の特徴量(面積、重心、形状を数値化)を抽出する処理です。

以下に、取得した画像で、対象物の面積(画素数×スケールファクター)に相当する、画素数を計測した
例を示します。

二値化画像

原画を計測用に2値化処理した画像
(黒い部分が背景、白い部分が計測対象物)


ラベリングし色分けされた画像

個々の対象物にラベル付けし、識別用に色分けした画像



各対象物に関する情報

1、obj[???]. は個々のオブジェクトを表し、??? の部分は、オブジェクトの番号
  (画像からは、151個のオブジェクトが識別された。)

2、Label(ラベル)は、個々のオブジェクトを識別する為に割り振られたラベル番号
  (特定オブジェクトを構成する画素には、同一ラベルが割り当てられる)

3、Pixel(ピクセル)は、ラベルにより識別されるオブジェクトを構成する画素数
  (Pixel '画素数' は、対象物の面積に相当する特徴量。)

obj[001].Label =    1,  Pixel =  8783
obj[002].Label =    2,  Pixel =  2606
obj[003].Label =    3,  Pixel =   128
obj[004].Label =    4,  Pixel =  4107
obj[005].Label =    5,  Pixel =   230
obj[006].Label =    6,  Pixel =   169
obj[007].Label =    7,  Pixel =   696
obj[008].Label =    8,  Pixel =  2457
obj[009].Label =    9,  Pixel = 12873
obj[010].Label =   10,  Pixel =   718
obj[011].Label =   15,  Pixel =  5833
obj[012].Label =   18,  Pixel =   172
obj[013].Label =   20,  Pixel =   153
obj[014].Label =   23,  Pixel =   306
obj[015].Label =   34,  Pixel =  1710
obj[016].Label =   35,  Pixel =    94
obj[017].Label =   44,  Pixel =   526
obj[018].Label =   50,  Pixel =   547
obj[019].Label =   62,  Pixel =  1549
obj[020].Label =   67,  Pixel =   920
obj[021].Label =   76,  Pixel =    94
obj[022].Label =   82,  Pixel =  1718
obj[023].Label =   83,  Pixel =  1726
obj[024].Label =   88,  Pixel =  1051
obj[025].Label =   90,  Pixel =  3154
obj[026].Label =   91,  Pixel =   519
obj[027].Label =   93,  Pixel =  1082
obj[028].Label =   94,  Pixel =  1246
obj[029].Label =   96,  Pixel =  3915
obj[030].Label =  101,  Pixel =  2041
obj[031].Label =  106,  Pixel =   848
obj[032].Label =  108,  Pixel =  1795
obj[033].Label =  113,  Pixel =   562
obj[034].Label =  115,  Pixel =  1477
obj[035].Label =  120,  Pixel =  1181
obj[036].Label =  121,  Pixel =   864
obj[037].Label =  126,  Pixel =   354
obj[038].Label =  127,  Pixel =   254
obj[039].Label =  129,  Pixel =  4744
obj[040].Label =  130,  Pixel =    87
obj[041].Label =  132,  Pixel =   466
obj[042].Label =  133,  Pixel =   388
obj[043].Label =  145,  Pixel =    90
obj[044].Label =  152,  Pixel =   419
obj[045].Label =  154,  Pixel =  1155
obj[046].Label =  155,  Pixel =   408
obj[047].Label =  159,  Pixel =   764
obj[048].Label =  161,  Pixel =  3379
obj[049].Label =  163,  Pixel =  1412
obj[050].Label =  168,  Pixel =  1731
obj[051].Label =  169,  Pixel =  2817
obj[052].Label =  175,  Pixel =  2125
obj[053].Label =  185,  Pixel =   285
obj[054].Label =  190,  Pixel =   350
obj[055].Label =  194,  Pixel =  1447
obj[056].Label =  197,  Pixel =  1278
obj[057].Label =  199,  Pixel =   443
obj[058].Label =  203,  Pixel =   144
obj[059].Label =  208,  Pixel =  1023
obj[060].Label =  210,  Pixel =    54
obj[061].Label =  213,  Pixel =   356
obj[062].Label =  214,  Pixel =   109
obj[063].Label =  215,  Pixel =   215
obj[064].Label =  216,  Pixel =   395
obj[065].Label =  217,  Pixel =  1728
obj[066].Label =  219,  Pixel =   370
obj[067].Label =  221,  Pixel =  1550
obj[068].Label =  222,  Pixel =   306
obj[069].Label =  224,  Pixel =  1508
obj[070].Label =  229,  Pixel =   820
obj[071].Label =  234,  Pixel =  2063
obj[072].Label =  237,  Pixel =   709
obj[073].Label =  241,  Pixel =  1914
obj[074].Label =  242,  Pixel =    69
obj[075].Label =  243,  Pixel =   419

obj[076].Label =  244,  Pixel =   284
obj[077].Label =  248,  Pixel =  1588
obj[078].Label =  249,  Pixel =  1218
obj[079].Label =  255,  Pixel =  1243
obj[080].Label =  257,  Pixel =  1235
obj[081].Label =  261,  Pixel =  1833
obj[082].Label =  264,  Pixel =   706
obj[083].Label =  267,  Pixel =   289
obj[084].Label =  272,  Pixel =   183
obj[085].Label =  274,  Pixel =   161
obj[086].Label =  281,  Pixel =   176
obj[087].Label =  285,  Pixel =  1083
obj[088].Label =  288,  Pixel =    69
obj[089].Label =  290,  Pixel =   126
obj[090].Label =  292,  Pixel =   310
obj[091].Label =  297,  Pixel =   938
obj[092].Label =  298,  Pixel =   304
obj[093].Label =  300,  Pixel =   115
obj[094].Label =  302,  Pixel =   324
obj[095].Label =  304,  Pixel =  1694
obj[096].Label =  305,  Pixel =   290
obj[097].Label =  309,  Pixel =   370
obj[098].Label =  310,  Pixel =   105
obj[099].Label =  311,  Pixel =   424
obj[100].Label =  315,  Pixel =    95
obj[101].Label =  317,  Pixel =   169
obj[102].Label =  319,  Pixel =  1384
obj[103].Label =  322,  Pixel =  1626
obj[104].Label =  324,  Pixel =  4787
obj[105].Label =  326,  Pixel =  1255
obj[106].Label =  330,  Pixel =  1130
obj[107].Label =  336,  Pixel =    39
obj[108].Label =  340,  Pixel =  2191
obj[109].Label =  343,  Pixel =  1966
obj[110].Label =  348,  Pixel =  2424
obj[111].Label =  358,  Pixel =  1590
obj[112].Label =  373,  Pixel =   714
obj[113].Label =  383,  Pixel =   140
obj[114].Label =  384,  Pixel =   269
obj[115].Label =  385,  Pixel =  1585
obj[116].Label =  386,  Pixel =  1941
obj[117].Label =  389,  Pixel =   143
obj[118].Label =  391,  Pixel =   634
obj[119].Label =  393,  Pixel =  1554
obj[120].Label =  396,  Pixel =    78
obj[121].Label =  397,  Pixel =  1391
obj[122].Label =  399,  Pixel =   854
obj[123].Label =  401,  Pixel =   477
obj[124].Label =  402,  Pixel =  1347
obj[125].Label =  411,  Pixel =  1951
obj[126].Label =  419,  Pixel =   374
obj[127].Label =  420,  Pixel =  1235
obj[128].Label =  422,  Pixel =   392
obj[129].Label =  423,  Pixel =   296
obj[130].Label =  425,  Pixel =   400
obj[131].Label =  426,  Pixel =   606
obj[132].Label =  434,  Pixel =   142
obj[133].Label =  435,  Pixel =   310
obj[134].Label =  437,  Pixel =   113
obj[135].Label =  438,  Pixel =   644
obj[136].Label =  443,  Pixel =   150
obj[137].Label =  445,  Pixel =    88
obj[138].Label =  449,  Pixel =   101
obj[139].Label =  450,  Pixel =   959
obj[140].Label =  451,  Pixel =   218
obj[141].Label =  455,  Pixel =   707
obj[142].Label =  459,  Pixel =   343
obj[143].Label =  460,  Pixel =   748
obj[144].Label =  461,  Pixel =   131
obj[145].Label =  463,  Pixel =   167
obj[146].Label =  472,  Pixel =   539
obj[147].Label =  474,  Pixel =   302
obj[148].Label =  483,  Pixel =    92
obj[149].Label =  484,  Pixel =    76
obj[150].Label =  485,  Pixel =    49
obj[151].Label =  486,  Pixel =    79

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