"Fossies" - the Fresh Open Source Software Archive  

Source code changes of the file "javase/src/main/java/com/google/zxing/client/j2se/BufferedImageLuminanceSource.java" between
zxing-zxing-3.4.0.tar.gz and zxing-zxing-3.4.1.tar.gz

About: ZXing ("zebra crossing") is a multi-format 1D/2D barcode image processing library implemented in Java, with ports to other languages.

BufferedImageLuminanceSource.java  (zxing-zxing-3.4.0)	:	BufferedImageLuminanceSource.java  (zxing-zxing-3.4.1)
skipping to change at line 70		skipping to change at line 70
int[] buffer = new int[width];		int[] buffer = new int[width];
for (int y = top; y < top + height; y++) {		for (int y = top; y < top + height; y++) {
image.getRGB(left, y, width, 1, buffer, 0, sourceWidth);		image.getRGB(left, y, width, 1, buffer, 0, sourceWidth);
for (int x = 0; x < width; x++) {		for (int x = 0; x < width; x++) {
int pixel = buffer[x];		int pixel = buffer[x];
// The color of fully-transparent pixels is irrelevant. They are often , technically, fully-transparent		// The color of fully-transparent pixels is irrelevant. They are often , technically, fully-transparent
// black (0 alpha, and then 0 RGB). They are often used, of course as the "white" area in a		// black (0 alpha, and then 0 RGB). They are often used, of course as the "white" area in a
// barcode image. Force any such pixel to be white:		// barcode image. Force any such pixel to be white:
if ((pixel & 0xFF000000) == 0) {		if ((pixel & 0xFF000000) == 0) {
pixel = 0xFFFFFFFF; // = white		// white, so we know its luminance is 255
}		buffer[x] = 0xFF;
		} else {
// .299R + 0.587G + 0.114B (YUV/YIQ for PAL and NTSC),		// .299R + 0.587G + 0.114B (YUV/YIQ for PAL and NTSC),
// (306*R) >> 10 is approximately equal to R*0.299, and so on.		// (306*R) >> 10 is approximately equal to R*0.299, and so on.
// 0x200 >> 10 is 0.5, it implements rounding.		// 0x200 >> 10 is 0.5, it implements rounding.
buffer[x] =		buffer[x] =
(306 * ((pixel >> 16) & 0xFF) +		(306 * ((pixel >> 16) & 0xFF) +
601 * ((pixel >> 8) & 0xFF) +		601 * ((pixel >> 8) & 0xFF) +
117 * (pixel & 0xFF) +		117 * (pixel & 0xFF) +
0x200) >> 10;		0x200) >> 10;
		}
}		}
raster.setPixels(left, y, width, 1, buffer);		raster.setPixels(left, y, width, 1, buffer);
}		}
}		}
this.left = left;		this.left = left;
this.top = top;		this.top = top;
}		}
@Override		@Override
End of changes. 2 change blocks.
10 lines changed or deleted		11 lines changed or added

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