Inner minutiae

Inner minutiae, a part of algorithm transparency, are the result of the first filter applied to skeleton minutiae before removing minutia clouds. Inner minutiae are those minutiae that are within inner mask when offset against their direction (in effect, inward pointing minutiae are filtered more aggressively).

KeywordSuffixZip
inner-minutiae.json073-inner-minutiae.json

Visualization

Visualization of inner minutiae was constructed by comparing this stage's json data with skeleton minutiae. Original fingerprint is in the background. Visualization itself is not part of transparency data.

Fingerprint minutiae, blue endings and green bifurcations, after inner mask filtering with original fingerprint in the background
Minutiae filtered by inner mask. Endings are blue, bifurcations are green. Removed minutiae, if any, are red.

Json

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

Example: 073-inner-minutiae.json

{
  "width": 388,
  "height": 374,
  "minutiae": [
    {
      "x": 80,
      "y": 156,
      "direction": 1.9936502529278375,
      "type": "ending"
    },
    {
      "x": 142,
      "y": 304,
      "direction": 5.780342096251726,
      "type": "ending"
    },
    {
      "x": 78,
      "y": 242,
      "direction": 5.275705241876658,
      "type": "ending"
    },
    {
      "x": 201,
      "y": 23,
      "direction": 3.0419240010986313,
      "type": "ending"
    },
    {
      "x": 208,
      "y": 348,
      "direction": 0.0,
      "type": "ending"
    },
    {
      "x": 112,
      "y": 288,
      "direction": 5.497787143782138,
      "type": "ending"
    },
    {
      "x": 278,
      "y": 282,
      "direction": 5.412281850103933,
      "type": "ending"
    },
    {
      "x": 178,
      "y": 314,
      "direction": 5.81953769817878,
      "type": "ending"
    },
    {
      "x": 248,
      "y": 246,
      "direction": 2.1112158270654806,
      "type": "ending"
    },
    {
      "x": 136,
      "y": 168,
      "direction": 1.9074711461816238,
      "type": "ending"
    },
    {
      "x": 134,
      "y": 284,
      "direction": 5.523422552303815,
      "type": "ending"
    },
    {
      "x": 254,
      "y": 164,
      "direction": 1.5208379310729538,
      "type": "ending"
    },
    {
      "x": 74,
      "y": 136,
      "direction": 1.9513027039072617,
      "type": "ending"
    },
    {
      "x": 168,
      "y": 294,
      "direction": 5.523422552303815,
      "type": "ending"
    },
    {
      "x": 302,
      "y": 242,
      "direction": 5.244113047643495,
      "type": "ending"
    },
    {
      "x": 304,
      "y": 188,
      "direction": 4.4674103172578254,
      "type": "ending"
    },
    {
      "x": 238,
      "y": 202,
      "direction": 4.8120576328758515,
      "type": "ending"
    },
    {
      "x": 201,
      "y": 331,
      "direction": 6.085789747329706,
      "type": "ending"
    },
    {
      "x": 204,
      "y": 294,
      "direction": 5.639684198386302,
      "type": "ending"
    },
    {
      "x": 194,
      "y": 93,
      "direction": 0.6000502134017536,
      "type": "ending"
    },
    {
      "x": 239,
      "y": 234,
      "direction": 5.0490637997714165,
      "type": "ending"
    },
    {
      "x": 237,
      "y": 301,
      "direction": 5.780342096251726,
      "type": "ending"
    },
    {
      "x": 126,
      "y": 198,
      "direction": 5.0490637997714165,
      "type": "ending"
    },
    {
      "x": 279,
      "y": 69,
      "direction": 0.960070362405688,
      "type": "ending"
    },
    {
      "x": 192,
      "y": 212,
      "direction": 5.092895357497055,
      "type": "ending"
    },
    {
      "x": 197,
      "y": 121,
      "direction": 1.5707963267948966,
      "type": "bifurcation"
    },
    {
      "x": 224,
      "y": 324,
      "direction": 6.085789747329706,
      "type": "bifurcation"
    },
    {
      "x": 246,
      "y": 196,
      "direction": 1.7681918866447774,
      "type": "bifurcation"
    },
    {
      "x": 245,
      "y": 286,
      "direction": 5.497787143782138,
      "type": "bifurcation"
    },
    {
      "x": 300,
      "y": 134,
      "direction": 4.209545769456828,
      "type": "bifurcation"
    },
    {
      "x": 216,
      "y": 178,
      "direction": 1.8157749899217608,
      "type": "bifurcation"
    },
    {
      "x": 265,
      "y": 207,
      "direction": 1.6704649792860586,
      "type": "bifurcation"
    },
    {
      "x": 248,
      "y": 264,
      "direction": 5.21523219131255,
      "type": "bifurcation"
    },
    {
      "x": 282,
      "y": 244,
      "direction": 1.8622531212727638,
      "type": "bifurcation"
    },
    {
      "x": 168,
      "y": 196,
      "direction": 4.90978454023457,
      "type": "bifurcation"
    },
    {
      "x": 174,
      "y": 16,
      "direction": 6.134295359570089,
      "type": "bifurcation"
    },
    {
      "x": 284,
      "y": 198,
      "direction": 1.4219063791853994,
      "type": "bifurcation"
    },
    {
      "x": 204,
      "y": 134,
      "direction": 1.5208379310729538,
      "type": "bifurcation"
    },
    {
      "x": 140,
      "y": 86,
      "direction": 5.252808480655274,
      "type": "bifurcation"
    },
    {
      "x": 288,
      "y": 124,
      "direction": 1.1479424006619559,
      "type": "bifurcation"
    },
    {
      "x": 189,
      "y": 125,
      "direction": 1.8157749899217608,
      "type": "bifurcation"
    },
    {
      "x": 238,
      "y": 178,
      "direction": 1.719686274404394,
      "type": "bifurcation"
    },
    {
      "x": 192,
      "y": 103,
      "direction": 2.4149503129080676,
      "type": "bifurcation"
    },
    {
      "x": 177,
      "y": 153,
      "direction": 1.8157749899217608,
      "type": "bifurcation"
    },
    {
      "x": 160,
      "y": 174,
      "direction": 1.8157749899217608,
      "type": "bifurcation"
    },
    {
      "x": 310,
      "y": 166,
      "direction": 4.607512041654456,
      "type": "bifurcation"
    },
    {
      "x": 214,
      "y": 74,
      "direction": 0.844153986113171,
      "type": "bifurcation"
    }
  ]
}