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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Transpiled version (5123L) is out of date.

static BWImage iBWAutoContrast(IBWImage bw) {
  ret iBWAutoContrast(bw, 0f);
}

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

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: 188 / 279
Version history: 3 change(s)
Referenced in: #1006654 - Standard functions list 2 (LIVE, continuation of #761)