在Java语言编程中,如何使用Java(读/写)读取复制和粘贴图片?
注意:需要访问网址:http://book2s.com/java/jar/o/opencv/download-opencv-3.2.0-0.html , 下载一个OpenCV软件包。这里下载最新版本:opencv-3.2.0-vc14.exe并解压此文件到D:\software\opencv目录中。
项目结构如下图所示 -
添加一个用户自定义库:OpenCV3.2,并指配置构建路径为:D:\software\opencv\opencv\build\java\x64,如下图所示 -
注:可参考: http://blog.csdn.net/shawncheer/article/details/51098456
以下是使用Java复制和粘贴图像的程序 -
package com.yiibai;
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.imgcodecs.Imgcodecs;
// opencv-3.2.0.jar 下载地址:http://github.com/opencv/opencv/releases/tag/3.3.0
public class CopyAndPasteAnImage {
public static void main(String args[]) {
String propath = System.getProperty("user.dir");
System.out.println(propath);
// Loading the OpenCV core library
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
// Reading the Image from the file and storing it in to a Matrix object
String file = propath+"/images/mydog.jpg";
Mat matrix = Imgcodecs.imread(file);
System.out.println("Image Loaded ..........");
String file2 = propath+"/images/mydogResaved.jpg";
// Writing the image
Imgcodecs.imwrite(file2, matrix);
System.out.println("Image Saved ............");
}
}
执行上面示例代码,得到以下结果 -
F:\worksp\javaexamples\java_opencv
Image Loaded ..........
Image Saved ............
在执行上面示例代码成功后,应该会在 F:\worksp\javaexamples\java_opencv\images 目录中有看到生成一个文件:mydogResaved.jpg 。
问题
F:\worksp\javaexamples\java_opencv
Exception in thread "main" java.lang.UnsatisfiedLinkError: no opencv_java320 in java.library.path
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at com.yiibai.CopyAndPasteAnImage.main(CopyAndPasteAnImage.java:13)
解决上述问题可通过参考: http://blog.csdn.net/shawncheer/article/details/51098456