本文介绍了一种将彩色图像转换为灰度图像的方法。通过随机选取红绿蓝通道的权重，并利用这些权重对每个像素的颜色值进行加权平均，实现色彩信息的灰度化。最终通过修改图像的RGB值来完成灰度图像的生成。
public static Image getHuidu(Image img) {
int[] aT = new int[img.getWidth() * img.getHeight()]; img .getRGB(aT, 0, img.getWidth(), 0, 0, img.getWidth(), img .getHeight()); int x1 = AppCanvas.getRandom(0, 255); // 10 int x2 = AppCanvas.getRandom(0, 255 - x1);// 10 int x3 = AppCanvas.getRandom(0, 255 - x1 - x2);// 235
for (int i = 0; i < aT.length; i++) {
int r = ((aT[i] >> 16) & 0x000000ff); int g = ((aT[i] >> 8) & 0x000000ff); int b = (aT[i] & 0x000000ff); int gray = (r * x1 + g * x2 + b * x3) >> 8; aT[i] = gray & 0x0000ff | (gray & 0x0000ff) << 8 | (gray & 0x0000ff) << 16;
} return img.createRGBImage(aT, img.getWidth(), img.getHeight(), false);
}
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