Is there any alternative for OpenCV imshow() method in Java?

The HighGui class of the org.opencv.highgui package allows you to create and manipulate windows and display them. You can display an image in a window using the imshow() method of this class. This method accepts two parameters−

• A string variable representing the name of the window.

• A Mat object representing the contents of an image.

It is recommended to invoke the waitKey() method after imshow().

Example

The following example reads an image, converts it into a grayscale image, detects the edges in it and displays all the three images (original, gray-scale and, edges) in windows using HighGui.

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.highgui.HighGui;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
public class ImshowExample {
   public static void main(String args[]) {
      //Loading the OpenCV core library
      System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
      //Reading the Image from the file
      Mat src = Imgcodecs.imread("D://images//window.jpg");
      HighGui.imshow("Original Image", src);
      //Converting color to gray scale
      Mat gray = new Mat(src.rows(), src.cols(), src.type());
      Imgproc.cvtColor(src, gray, Imgproc.COLOR_RGB2GRAY);
      HighGui.imshow("Gray Scale Image", gray);
      //Applying canny
      Mat dst = new Mat(src.rows(), src.cols(), src.type());
      Imgproc.Canny(gray, dst, 100, 100*3);
      HighGui.imshow("Edges", dst);
      HighGui.waitKey();
   }
}

Output

On executing, the above program generates three windows as shown below −

Original image −

Grayscale image −

Image with edges highlighted −

Krishna Kasyap

Published on 13-Apr-2020 10:39:44

• Related Questions & Answers
• Is there any alternative for CONCAT() in MySQL?
• Is there any alternative solution for static constructor in java?
• Is there any precautionary medicine available for Dengue?
• Is there any method to convert a Set to immutable in Java
• Is their any alternative to HTML5 iframe srcdoc?
• Is there any Python object inspector?
• Which is the JavaScript RegExp to find any alternative text?
• Is there any duty concession on farm vehicles?
• Are there any ways to Manipulate Strings in Java.
• Are there any style options for the HTML5 Date picker?
• Is there any way to skip some documents in MongoDB?
• Working with MySQL WHERE.. OR query with multiple OR usage. Is there an alternative?
• Is there any tool that can convert an XSD file to a Python class as JAXB does for Java?
• Is there any technique to stop your orgasms from fading?
• Is there any whoami function or command in MySQL like UNIX?