在Java中逐像素访问图像

Question

Is there any inbuilt java API or class library for accessing pixels in a given image? What I am planning to do is search one image inside another image. For example : img1 is 24x24px , img2 is 1024x768px assume that a symbol, similar to img1 may exists in img2 . Now I want to get X and Y coordinates of the symbol which is similar to the img1.

Answer 1

Yes, there is, if you have your image as a BufferedImage then use the getRGB(int x, int y) method to get the value of the pixel at the position (x, y).

See the API documentation of java.awt.image.BufferedImage .

Answer 2

您可以在Java BufferedImage类中使用getRGB(...)方法。

Answer 3

If you have a java.awt.image.BufferedImage , you can call getRGB() , which returns a array of int s containing the color values of each pixel.

If you Image is not an instance of BufferedImage , you can use java.awt.image.PixelGrabber to get the same result, using the setPixels() method.