工程下载地址
https://download.csdn.net/download/qq_16596909/11522434
opencv4 java netbeans开发，基于maven
可以按照倍率缩放，也可以指定分辨率缩放（可能会变形）
原图
0.5倍缩放
private void jBresizeActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: System.loadLibrary(Core.NATIVE_LIBRARY_NAME); org.opencv.core.Mat imgMat = imread("src\\resource\\" + jTFimgName.getText());//读取图片 float scale = 0.5f; float width = imgMat.width(); float height = imgMat.height(); org.opencv.core.Mat dst = new Mat(); Imgproc.resize(imgMat, dst, new Size(width * scale, height * scale)); Imgcodecs.imwrite("src\\resource\\0.5.png", dst); }
1.5倍缩放
private void jBresize1ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: System.loadLibrary(Core.NATIVE_LIBRARY_NAME); org.opencv.core.Mat imgMat = imread("src\\resource\\" + jTFimgName.getText());//读取图片 float scale = 1.5f; float width = imgMat.width(); float height = imgMat.height(); org.opencv.core.Mat dst = new Mat(); Imgproc.resize(imgMat, dst, new Size(width * scale, height * scale)); Imgcodecs.imwrite("src\\resource\\1.5.png", dst); }
指定分辨率缩放
private void jBresize2ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: System.loadLibrary(Core.NATIVE_LIBRARY_NAME); org.opencv.core.Mat imgMat = imread("src\\resource\\" + jTFimgName.getText());//读取图片 org.opencv.core.Mat dst = new Mat(); Imgproc.resize(imgMat, dst, new Size(320, 240)); Imgcodecs.imwrite("src\\resource\\320X240.png", dst); }
原文：https://www.cnblogs.com/jnhs/p/11334776.html