Java 实现灰度图转真彩图

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1 问题

Java 实现灰度图转真彩图

在这里插入图片描述
将以上的图片，jpg png 都可以，转为有颜色的

2 实现

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;}
}