Filter2D操作将图像与内核进行卷积。可以使用imgproc
类的Filter2D()
方法在图像上执行此操作。 以下是这种方法的语法 -
filter2D(src, dst, ddepth, kernel)
该方法接受以下参数 -
Mat
对象。Mat
对象。Mat
对象。以下程序演示如何在给定图像上执行Filter2D滤镜操作。
package com.zyiz.filtering; import org.opencv.core.Core; import org.opencv.core.CvType; import org.opencv.core.Mat; import org.opencv.imgcodecs.Imgcodecs; import org.opencv.imgproc.Imgproc; public class Filter2D { public static void main(String[] args) { // 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 = \\\"F:/worksp/opencv/images/sample2.jpg\\\"; Mat src = Imgcodecs.imread(file); // Creating an empty matrix to store the result Mat dst = new Mat(); // Creating kernel matrix Mat kernel = Mat.ones(2, 2, CvType.CV_32F); for (int i = 0; i < kernel.rows(); i++) { for (int j = 0; j < kernel.cols(); j++) { double[] m = kernel.get(i, j); for (int k = 1; k < m.length; k++) { m[k] = m[k] / (2 * 2); } kernel.put(i, j, m); } } Imgproc.filter2D(src, dst, -1, kernel); Imgcodecs.imwrite(\\\"F:/worksp/opencv/images/sample2filter2d.jpg\\\", dst); System.out.println(\\\"Image Processed\\\"); } }
假定以下是上述程序中指定的输入图像sample2.jpg
。
执行上面示例代码,得到以下结果 -