scaledGrayBytesFromBWIntegralImage [1033676]

< > BotCompany Repo | #1033676 // scaledGrayBytesFromBWIntegralImage

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

meta-for BWIntegralImage also as IBWIntegralImage {

  static byte[] scaledGrayBytesFromBWIntegralImage(int w, BWIntegralImage img) {
    ret scaledGrayBytesFromBWIntegralImage(img, w);
  }
  
  static byte[] scaledGrayBytesFromBWIntegralImage(BWIntegralImage img, int w, int h default heightForWidth(img, w)) {
    int w1 = img.getWidth(), h1 = img.getHeight();
    double stepX = doubleRatio(w1, w), stepY = doubleRatio(h1, h);
    byte[] pixels = new[w*h];
    int i = 0;
    double srcY = 0;
    
    if (stepX == 1 && stepY == 1) {
      // No scaling
      
      for y to h:
        for x to w: {
          int pixel = img.getPixelBrightness(x, y);
          pixels[i++] = clampToUByte(pixel);
        }
    } else {
      // With arbitrary scaling
      
      for y to h: {
        double srcX = 0, nextSrcY = srcY+stepY;
        
        for x to w: {
          double nextSrcX = srcX+stepX;
          int pixel = iround(img.getPixelAverage(srcX, srcY, nextSrcX, nextSrcY));
          pixels[i++] = clampToUByte(pixel);
          srcX = nextSrcX;
        }
        srcY = nextSrcY;
      }
    }
    
    ret pixels;
  }

}

Author comment

Began life as a copy of #1033440

Travelled to 3 computer(s): bhatertpkbcr, mowyntqkapby, mqqgnosmbjvj

Snippet ID:

#1033676

Snippet name:

scaledGrayBytesFromBWIntegralImage

Eternal ID of this version:

#1033676/5

Text MD5:

f38e44871bd093087bb2a56c7091d3c2

Transpilation MD5:

0620d3650c5f1926b87cb43f00baddc3

Author:

stefan

Category:

javax / imaging

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2022-03-26 03:54:02

Source code size:

1173 bytes / 41 lines

Pitched / IR pitched:

No / No

Views / Downloads:

78 / 137

Version history:

4 change(s)

Referenced in:

[show references]

1	meta-for BWIntegralImage also as IBWIntegralImage {
2
3	static byte[] scaledGrayBytesFromBWIntegralImage(int w, BWIntegralImage img) {
4	ret scaledGrayBytesFromBWIntegralImage(img, w);
5	}
6
7	static byte[] scaledGrayBytesFromBWIntegralImage(BWIntegralImage img, int w, int h default heightForWidth(img, w)) {
8	int w1 = img.getWidth(), h1 = img.getHeight();
9	double stepX = doubleRatio(w1, w), stepY = doubleRatio(h1, h);
10	byte[] pixels = new[w*h];
11	int i = 0;
12	double srcY = 0;
13
14	if (stepX == 1 && stepY == 1) {
15	// No scaling
16
17	for y to h:
18	for x to w: {
19	int pixel = img.getPixelBrightness(x, y);
20	pixels[i++] = clampToUByte(pixel);
21	}
22	} else {
23	// With arbitrary scaling
24
25	for y to h: {
26	double srcX = 0, nextSrcY = srcY+stepY;
27
28	for x to w: {
29	double nextSrcX = srcX+stepX;
30	int pixel = iround(img.getPixelAverage(srcX, srcY, nextSrcX, nextSrcY));
31	pixels[i++] = clampToUByte(pixel);
32	srcX = nextSrcX;
33	}
34	srcY = nextSrcY;
35	}
36	}
37
38	ret pixels;
39	}
40
41	}