获取图像周围的像素颜色

Question

我有一个图像，我想出了如何使用robot和getPixelColor（）来获取某个像素的颜色。图像是我控制的一个角色，我希望机器人不断扫描图像，并告诉我周围的像素是否等于某种颜色。这是可能吗？谢谢！

Answer 1

我自己，我会使用机器人提取比“字符”稍大的图像，然后分析获得的BufferedImage。详细信息当然取决于您的计划的详细信息。可能最快的是获取BufferedImage的Raster，然后获取那个dataBuffer，然后获取该数据，并分析返回的数组。

例如，

// screenRect is a Rectangle the contains your "character" 
// + however many images around your character that you desire
BufferedImage img = robot.createScreenCapture(screenRect);
int[] imgData = ((DataBufferInt)img.getRaster().getDataBuffer()).getData();

// now that you've got the image ints, you can analyze them as you wish.
// All I've done below is get rid of the alpha value and display the ints.
for (int i = 0; i < screenRect.height; i++) {
  for (int j = 0; j < screenRect.width; j++) {
    int index = i * screenRect.width + j;
    int imgValue = imgData[index] & 0xffffff;
    System.out.printf("%06x ", imgValue );
  }
  System.out.println();
}