java - 使用 BufferedImages 获取图像每个像素的颜色

Question

我正在尝试获取图像每个像素的每种颜色。 我的想法如下:

int[] pixels;
BufferedImage image;

image = ImageIO.read(this.getClass.getResources("image.png");
int[] pixels = ((DataBufferInt)image.getRaster().getDataBuffer()).getData();

是吗？我什至无法检查“像素”数组包含的内容，因为出现以下错误:

java.awt.image.DataBufferByte cannot be cast to java.awt.image.DataBufferInt

我只想接收数组中每个像素的颜色，我该如何实现？

Answer 1

import java.io.*;
import java.awt.*;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;

public class GetPixelColor {
    public static void main(String args[]) throws IOException {
        File file = new File("your_file.jpg");
        BufferedImage image = ImageIO.read(file);
        // Getting pixel color by position x and y 
        int clr = image.getRGB(x, y);
        int red =   (clr & 0x00ff0000) >> 16;
        int green = (clr & 0x0000ff00) >> 8;
        int blue =   clr & 0x000000ff;
        System.out.println("Red Color value = " + red);
        System.out.println("Green Color value = " + green);
        System.out.println("Blue Color value = " + blue);
    }
}

当然你必须为所有像素添加一个for循环