Java OpenCV-4.0.0 图像处理8 图像像素点的获取与操作
java OpenCV-4.0.0 获取图像像素点并对像素点进行操作
package com.xu.image;import org.opencv.core.Core;import org.opencv.core.Mat;import org.opencv.core.Size;import org.opencv.highgui.HighGui;import org.opencv.imgcodecs.Imgcodecs;import org.opencv.imgproc.Imgproc;/** * * @Title: OpenCV.java * @Package com.xu.opencv * @Description: TODO * @author: xuhyacinth * @date: 2019年1月17日 下午7:54:15 * @version V-1.0 * @Copyright: 2019 xuhyacinth * */public class Test {static {//在使用OpenCV前必须加载Core.NATIVE_LIBRARY_NAME类,否则会报错System.loadLibrary(Core.NATIVE_LIBRARY_NAME);}public static void main(String[] args) {getPixelImage();}/** * OpenCV-4.0.0 获取图像像素点 * @return: void * @date: 2019年1月17日 下午8:24:07 */public static void getPixelImage_1() {Mat src = Imgcodecs.imread("C:\Users\Administrator\Pictures\0001.jpg");Mat dst = new Mat(src.size(),src.type());int channels = src.channels();//获取图像通道数double[] pixel = new double[3];//用于存放像素点for (int i = 0, rlen = src.rows(); i < rlen; i++) {for (int j = 0, clen = src.cols(); j < clen; j++) {if (channels == 3) {//图片为3通道即平常的(B,G,R)pixel = src.get(i, j).clone();pixel[0] = 255 - pixel[0];//Bpixel[1] = 255 - pixel[1];//Gpixel[2] = 255 - pixel[2];//Rdst.put(i, j, pixel);} else {//图片为单通道dst.put(i, j, src.get(i, j).clone());}}}Imgproc.resize(src, src, new Size(src.cols()/2,src.rows()/2));HighGui.imshow("图片测试", dst);HighGui.waitKey(0);}/** * OpenCV-4.0.0 获取图像像素点 * @return: void * @date: 2019年11月24日 下午8:24:07 */public static void getPixelImage_2() {Mat src = Imgcodecs.imread("C:\Users\Administrator\Pictures\0001.jpg");Mat dst = new Mat(src.size(),src.type());double[] pixel = new double[3];//用于存放像素点for (int i = 0 ,row = (int) src.size().height; i < row; i++) {for (int j = 0,col = (int) src.size().width; j < col; j++) {pixel = src.get(i, j).clone();pixel[0] = 255 - pixel[0];//Bpixel[1] = 255 - pixel[1];//Gpixel[2] = 255 - pixel[2];//Rdst.put(i, j, pixel);}}HighGui.imshow("图片测试", dst);HighGui.waitKey(0);}}