1 问题
Java 实现灰度图转真彩图
将以上的图片，jpg png 都可以，转为有颜色的
2 实现
代码语言：javascript复制import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.image.Raster;
import java.io.File;
public class DatUtils {
public static void main(String[] args) {
File file = new File("C:\Users\\55\1.jpg");
File file1 = new File("C:\Users\\55");
System.out.println(picGrayToColour(file.getPath(),file1.getPath(),"33.jpg"));
}
/**
* 灰度图转真彩图
* @param path-灰度图路径
* @param outPath-真彩图输出路径
*/
public static boolean picGrayToColour(String path, String outPath, String picName){
try {
File file = new File(path);
BufferedImage bufferedImage = ImageIO.read(file);
BufferedImage bImage=new BufferedImage(bufferedImage.getWidth(),bufferedImage.getHeight(),BufferedImage.TYPE_4BYTE_ABGR);
Raster data = bufferedImage.getData();
for(int i=0;i<bufferedImage.getHeight();i ){
for(int j=0;j<bufferedImage.getWidth();j ){
double[] pixel = data.getPixel(j, i, new double[4]);
int rgba;
if(pixel[0]<10){
rgba = new Color(0,0,0,0).getRGB();
}else {
int[] colorMsg = getColorMsg(pixel[0]);
rgba = new Color(colorMsg[0],colorMsg[1],colorMsg[2],colorMsg[3]).getRGB();
}
bImage.setRGB(j,i,rgba);
}
}
//创建文件与文件夹
File outFile = new File(outPath);
if (!outFile.exists()) {
outFile.mkdirs();
}
File pic = new File(outPath File.separator picName);
if (!pic.exists()) {
pic.createNewFile();
}
ImageIO.write(bImage,"png", pic);
return true;
}catch (Exception e){
return false;
}
}
private static int[] getColorMsg(double data){
int[] gradient = new int[]{10,15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70};
int[][] gradientColor = new int[][]{{1, 160, 246, 255}, {0, 236, 236, 255}, {0, 216, 0, 255}, {1, 144, 0, 255}, {255, 255, 0, 255}, {231, 192, 0, 255}, {255, 144, 0, 255}, {255, 0, 0, 255}, {214, 0, 0, 255}, {192, 0, 0, 255}, {255, 0, 240, 255}, {150, 0, 180, 255}, {173, 144, 240, 255}};
int[] colorMsg = new int[4];
for(int i=0;i<gradient.length-1;i ){
if(data<=gradient[i]){
colorMsg = gradientColor[i];
break;
}
if(data==gradient[i 1]){
colorMsg = gradientColor[i 1];
break;
}
if(data>gradient[i]&&data<gradient[i 1]){
// colorMsg[0] = new Double((gradientColor[i 1][0]-gradientColor[i][0])/(gradient[i 1]-gradient[i])*(data-gradient[i]) gradientColor[i][0]).intValue();
// colorMsg[1] = new Double((gradientColor[i 1][1]-gradientColor[i][1])/(gradient[i 1]-gradient[i])*(data-gradient[i]) gradientColor[i][1]).intValue();
// colorMsg[2] = new Double((gradientColor[i 1][2]-gradientColor[i][2])/(gradient[i 1]-gradient[i])*(data-gradient[i]) gradientColor[i][2]).intValue();
colorMsg[0] = Double.valueOf((gradientColor[i 1][0]-gradientColor[i][0])/(gradient[i 1]-gradient[i])*(data-gradient[i]) gradientColor[i][0]).intValue();
colorMsg[1] = Double.valueOf((gradientColor[i 1][1]-gradientColor[i][1])/(gradient[i 1]-gradient[i])*(data-gradient[i]) gradientColor[i][1]).intValue();
colorMsg[2] = Double.valueOf((gradientColor[i 1][2]-gradientColor[i][2])/(gradient[i 1]-gradient[i])*(data-gradient[i]) gradientColor[i][2]).intValue();
colorMsg[3] = 255;
break;
}
if(i 1==gradient.length-1){
colorMsg = gradientColor[i 1];
}
}
return colorMsg;
}
}
