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< > BotCompany Repo | #1027296 // iBWAutoContrast - uses actual min and max

JavaX fragment (include) [tags: use-pretranspiled]

Transpiled version (5123L) is out of date.

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static BWImage iBWAutoContrast(IBWImage bw) {
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  ret iBWAutoContrast(bw, 0f);
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}
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// def value is usually irrelevant
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static BWImage iBWAutoContrast(IBWImage bw, float def) {
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  if (bw == null) null;
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  int w = bw.getWidth(), h = bw.getHeight();
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  float min = 1, max = 0;
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  for y to h: for x to w: {
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    float f = bw.getFloatPixel(x, y);
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    min = min(min, f);
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    max = max(max, f);
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  }
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  if (min == max) ret new BWImage(w, h, def);
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  float factor = floatRatio(1, max-min);
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  BWImage bw2 = new BWImage(w, h);
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  for y to h: for x to w:
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    bw2.setPixel(x, y, (bw.getFloatPixel(x, y)-min)*factor);
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  ret bw2;
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}

Author comment

Began life as a copy of #1015507

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Snippet ID: #1027296
Snippet name: iBWAutoContrast - uses actual min and max
Eternal ID of this version: #1027296/4
Text MD5: c84acc2120f703847e7a36cd70faf024
Author: stefan
Category: javax / imaging
Type: JavaX fragment (include)
Public (visible to everyone): Yes
Archived (hidden from active list): No
Created/modified: 2020-03-01 00:02:49
Source code size: 624 bytes / 21 lines
Pitched / IR pitched: No / No
Views / Downloads: 189 / 280
Version history: 3 change(s)
Referenced in: [show references]