integralImage old [1034888]

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JavaX fragment (include)

static double[][] integralImage(BufferedImage img) {
  ret integralImage(new BWImage(img));
}

ifclass RGBImage
static double[][] integralImage(RGBImage rgb) {
  ret integralImage(toBW(rgb));
}
endif

static double[][] integralImage(BWImage bw) {
  int w = bw.getWidth(), h = bw.getHeight();
  double[][] ii = new double[h][w];
  
  for y to h: {
    double rowSum = 0;
    for x to w: {
      rowSum += bw.getPixel(x, y);
      ii[y][x] = y > 0 ? rowSum + ii[y-1][x] : rowSum;
    }
  }

  ret ii;
}

Author comment

Began life as a copy of #1009125

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

Snippet ID:

#1034888

Snippet name:

integralImage old

Eternal ID of this version:

#1034888/1

Text MD5:

725e273bb2bc7ee2ab15c4a0d49aaf95

Author:

stefan

Category:

javax / gui

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2022-03-13 01:24:18

Source code size:

523 bytes / 24 lines

Pitched / IR pitched:

No / No

Views / Downloads:

114 / 134

Referenced in:

[show references]

1	static double[][] integralImage(BufferedImage img) {
2	ret integralImage(new BWImage(img));
3	}
4
5	ifclass RGBImage
6	static double[][] integralImage(RGBImage rgb) {
7	ret integralImage(toBW(rgb));
8	}
9	endif
10
11	static double[][] integralImage(BWImage bw) {
12	int w = bw.getWidth(), h = bw.getHeight();
13	double[][] ii = new double[h][w];
14
15	for y to h: {
16	double rowSum = 0;
17	for x to w: {
18	rowSum += bw.getPixel(x, y);
19	ii[y][x] = y > 0 ? rowSum + ii[y-1][x] : rowSum;
20	}
21	}
22
23	ret ii;
24	}