rgbDiff - see pixelDiff [1006582]

< > BotCompany Repo | #1006582 // rgbDiff - see pixelDiff

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

static float rgbDiff(RGB a, RGB b) {
  return (float) (Math.abs(a.r-b.r) + Math.abs(a.g-b.g) + Math.abs(a.b-b.b))/3;
}

// 0xRRGGBB - result is between 0 and 1
static float rgbDiff(int a, int b) {
  int r1 = (a >> 16) & 0xFF;
  int g1 = (a >> 8) & 0xFF;
  int b1 = a & 0xFF;
  int r2 = (b >> 16) & 0xFF;
  int g2 = (b >> 8) & 0xFF;
  int b2 = b & 0xFF;
  ret (Math.abs(r1-r2) + Math.abs(g1-g2) + Math.abs(b1-b2))
    // hilarious micro-optimisation instead of just dividing
    // (99.9% sure HotSpot does this anyway!)
    *(1/(3f*255));
}

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Snippet ID:

#1006582

Snippet name:

rgbDiff - see pixelDiff

Eternal ID of this version:

#1006582/6

Text MD5:

a7a814589bd6241450dbc5bba2959592

Transpilation MD5:

77260e2d966dcec303c135f98c3a1bde

Author:

stefan

Category:

javax / imaging

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2022-08-27 01:13:19

Source code size:

556 bytes / 17 lines

Pitched / IR pitched:

No / No

Views / Downloads:

837 / 1006

Version history:

5 change(s)

Referenced in:

[show references]

1	static float rgbDiff(RGB a, RGB b) {
2	return (float) (Math.abs(a.r-b.r) + Math.abs(a.g-b.g) + Math.abs(a.b-b.b))/3;
3	}
4
5	// 0xRRGGBB - result is between 0 and 1
6	static float rgbDiff(int a, int b) {
7	int r1 = (a >> 16) & 0xFF;
8	int g1 = (a >> 8) & 0xFF;
9	int b1 = a & 0xFF;
10	int r2 = (b >> 16) & 0xFF;
11	int g2 = (b >> 8) & 0xFF;
12	int b2 = b & 0xFF;
13	ret (Math.abs(r1-r2) + Math.abs(g1-g2) + Math.abs(b1-b2))
14	// hilarious micro-optimisation instead of just dividing
15	// (99.9% sure HotSpot does this anyway!)
16	(1/(3f255));
17	}