Question

I have two BufferedImage objects, src and dest. Both are grayscale, src is 1bpc (B&W basically), and dest could really be any sort of color space/bpc/etc.

我需要能够在<代码>dest上提取一些颜色,作为比照数。基本上,如果<条码>src中的pixel为黑色,则应当改成色体。但是,如果<条码>src中的pixel是白色的,那么<条码>dest就应当单独保留。

如果是这样的话,我也正在引力行动中进行细致的变革。

Graphics2D g = dest.createGraphics();
// do something here???
g.drawImage(src, transform, null);
g.dispose();

In a pure B&W world this would involve a simple | of the pixel values together - but it seems like there s probably a correct way to do this using image operations.

Gutins本能说,这是一个确定合成和某种甲型六氯环己烷的问题,但我对使用什么价值感到完全损失。在图2d的更先进方面,我几乎没有经验——任何要点都会受到高度赞赏。

Answer 1

I think that I ve come up with an effective solution using this article

这当然是高效率的,尽管我不相信是否遵循最佳做法:

BufferedImage dest; // input
BufferedImage src; // input

...

byte[] r = new byte[]{(byte)0,(byte)255}; // 255=black, we could set it to some other gray component as desired
byte[] g = new byte[]{(byte)0,(byte)255};
byte[] b = new byte[]{(byte)0,(byte)255};
byte[] a = new byte[]{(byte)255,(byte)0};
IndexColorModel bitmaskColorModel = new IndexColorModel(1, 2, r, g, b, a);

BufferedImage masked = new BufferedImage(bitmaskColorModel, src.getRaster(), false, null);

Graphics2D g = dest.createGraphics();
g.drawImage(masked, transform, null);
g.dispose();

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