Removed tails

Tail removal, a part of algorithm transparency, is a filter applied to traced skeleton after gap removal and before fragment removal. Tails are short branches on ridges (or valleys in case of valley skeleton). They are usually a byproduct of thinning algorithm.

KeywordSuffixZip
ridges-removed-tails.json052-ridges-removed-tails.json
ridges-removed-tails.dat053-ridges-removed-tails.dat
valleys-removed-tails.json068-valleys-removed-tails.json
valleys-removed-tails.dat069-valleys-removed-tails.dat

Visualization

Visualization of skeleton after tail removal was constructed by comparing this stage's json and binary data to skeleton with gaps removed. Visualization itself is not part of transparency data.

Fingerprint skeleton with tails removed and changes marked red
Fingerprint skeleton after tail removal. Removals, if any, are marked red.

Binary data

Binary data has the same structure as for traced skeleton.

Example: 053-ridges-removed-tails.dat

Json

Structure of json data is the same as for traced skeleton.

Example: 052-ridges-removed-tails.json

{
  "width": 388,
  "height": 374,
  "minutiae": [
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      "x": 76,
      "y": 268
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      "y": 326
    },
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      "y": 156
    },
    {
      "x": 308,
      "y": 256
    },
    {
      "x": 241,
      "y": 286
    },
    {
      "x": 142,
      "y": 304
    },
    {
      "x": 308,
      "y": 279
    },
    {
      "x": 78,
      "y": 242
    },
    {
      "x": 201,
      "y": 23
    },
    {
      "x": 312,
      "y": 173
    },
    {
      "x": 169,
      "y": 1
    },
    {
      "x": 246,
      "y": 192
    },
    {
      "x": 64,
      "y": 202
    },
    {
      "x": 208,
      "y": 348
    },
    {
      "x": 64,
      "y": 222
    },
    {
      "x": 94,
      "y": 326
    },
    {
      "x": 112,
      "y": 288
    },
    {
      "x": 313,
      "y": 204
    },
    {
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      "y": 369
    },
    {
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      "y": 266
    },
    {
      "x": 105,
      "y": 2
    },
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      "y": 282
    },
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      "y": 17
    },
    {
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      "y": 314
    },
    {
      "x": 278,
      "y": 294
    },
    {
      "x": 65,
      "y": 250
    },
    {
      "x": 318,
      "y": 94
    },
    {
      "x": 317,
      "y": 126
    },
    {
      "x": 265,
      "y": 202
    },
    {
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    {
      "x": 296,
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    {
      "x": 248,
      "y": 246
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    {
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    {
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    {
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    {
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    {
      "x": 316,
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    },
    {
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    },
    {
      "x": 298,
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    {
      "x": 298,
      "y": 282
    },
    {
      "x": 283,
      "y": 239
    },
    {
      "x": 204,
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    },
    {
      "x": 287,
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    },
    {
      "x": 281,
      "y": 318
    },
    {
      "x": 281,
      "y": 333
    },
    {
      "x": 134,
      "y": 284
    },
    {
      "x": 77,
      "y": 4
    },
    {
      "x": 300,
      "y": 266
    },
    {
      "x": 254,
      "y": 164
    },
    {
      "x": 170,
      "y": 216
    },
    {
      "x": 302,
      "y": 232
    },
    {
      "x": 208,
      "y": 75
    },
    {
      "x": 292,
      "y": 34
    },
    {
      "x": 74,
      "y": 136
    },
    {
      "x": 168,
      "y": 294
    },
    {
      "x": 238,
      "y": 176
    },
    {
      "x": 302,
      "y": 242
    },
    {
      "x": 304,
      "y": 188
    },
    {
      "x": 293,
      "y": 20
    },
    {
      "x": 322,
      "y": 150
    },
    {
      "x": 191,
      "y": 120
    },
    {
      "x": 238,
      "y": 202
    },
    {
      "x": 70,
      "y": 294
    },
    {
      "x": 86,
      "y": 310
    },
    {
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      "y": 2
    },
    {
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      "y": 331
    },
    {
      "x": 151,
      "y": 345
    },
    {
      "x": 60,
      "y": 102
    },
    {
      "x": 146,
      "y": 1
    },
    {
      "x": 267,
      "y": 348
    },
    {
      "x": 322,
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    },
    {
      "x": 262,
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    },
    {
      "x": 130,
      "y": 2
    },
    {
      "x": 81,
      "y": 4
    },
    {
      "x": 204,
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    },
    {
      "x": 194,
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    },
    {
      "x": 239,
      "y": 234
    },
    {
      "x": 174,
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    },
    {
      "x": 237,
      "y": 301
    },
    {
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    },
    {
      "x": 252,
      "y": 368
    },
    {
      "x": 82,
      "y": 12
    },
    {
      "x": 64,
      "y": 64
    },
    {
      "x": 177,
      "y": 147
    },
    {
      "x": 323,
      "y": 230
    },
    {
      "x": 195,
      "y": 103
    },
    {
      "x": 310,
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    },
    {
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      "y": 198
    },
    {
      "x": 160,
      "y": 170
    },
    {
      "x": 116,
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    },
    {
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    },
    {
      "x": 279,
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    },
    {
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    },
    {
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      "y": 361
    },
    {
      "x": 192,
      "y": 212
    },
    {
      "x": 62,
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    },
    {
      "x": 289,
      "y": 284
    },
    {
      "x": 74,
      "y": 298
    },
    {
      "x": 306,
      "y": 279
    },
    {
      "x": 62,
      "y": 166
    },
    {
      "x": 62,
      "y": 180
    },
    {
      "x": 64,
      "y": 122
    },
    {
      "x": 66,
      "y": 62
    }
  ],
  "ridges": [
    {
      "start": 0,
      "end": 60,
      "length": 219
    },
    {
      "start": 1,
      "end": 41,
      "length": 77
    },
    {
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      "length": 23
    },
    {
      "start": 1,
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      "length": 59
    },
    {
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      "length": 25
    },
    {
      "start": 3,
      "end": 48,
      "length": 33
    },
    {
      "start": 4,
      "end": 31,
      "length": 463
    },
    {
      "start": 4,
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      "length": 60
    },
    {
      "start": 5,
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      "length": 232
    },
    {
      "start": 6,
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      "length": 3
    },
    {
      "start": 7,
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    },
    {
      "start": 8,
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    },
    {
      "start": 9,
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    },
    {
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    },
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    },
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    },
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    },
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}