我不确定从哪里开始,但是有没有一种方法可以使用 Java 逐行扫描图像以获取特定颜色,并将所有位置传递到 ArrayList 中?
问问题
739 次
2 回答
2
你能?是的。就是这样:
ArrayList<Point> list = new ArrayList<Point>();
BufferedImage bi= ImageIO.read(img); //Reads in the image
//Color you are searching for
int color= 0xFF00FF00; //Green in this example
for (int x=0;x<width;x++)
for (int y=0;y<height;y++)
if(bi.getRGB(x,y)==color)
list.add(new Point(x,y));
于 2013-05-12T18:59:17.980 回答
0
尝试使用PixelGrabber
. 它接受Image
or ImageProducer
。
这是改编自文档的示例:
public void handleSinglePixel(int x, int y, int pixel) {
int alpha = (pixel >> 24) & 0xff;
int red = (pixel >> 16) & 0xff;
int green = (pixel >> 8) & 0xff;
int blue = (pixel ) & 0xff;
// Deal with the pixel as necessary...
}
public void handlePixels(Image img, int x, int y, int w, int h) {
int[] pixels = new int[w * h];
PixelGrabber pg = new PixelGrabber(img, x, y, w, h, pixels, 0, w);
try {
pg.grabPixels();
} catch (InterruptedException e) {
System.err.println("interrupted waiting for pixels!");
return;
}
if ((pg.getStatus() & ImageObserver.ABORT) != 0) {
System.err.println("image fetch aborted or errored");
return;
}
for (int j = 0; j < h; j++) {
for (int i = 0; i < w; i++) {
handleSinglePixel(x+i, y+j, pixels[j * w + i]);
}
}
}
在您的情况下,您将拥有:
public void handleSinglePixel(int x, int y, int pixel) {
int target = 0xFFABCDEF; // or whatever
if (pixel == target) {
myArrayList.add(new java.awt.Point(x, y));
}
}
于 2013-05-12T18:59:11.740 回答