Create opencv_capture_picture.java

Author: sksalahuddin2828

opencv_capture_picture.java

@@ -0,0 +1,72 @@
+import org.opencv.core.Core;
+import org.opencv.core.CvType;
+import org.opencv.core.Mat;
+import org.opencv.core.Size;
+import org.opencv.videoio.VideoCapture;
+import org.opencv.imgproc.Imgproc;
+import org.opencv.highgui.HighGui;
+
+public class WebcamCapture {
+    public static void main(String[] args) {
+        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
+
+        VideoCapture cap = new VideoCapture(0);
+
+        if (!cap.isOpened()) {
+            System.out.println("Failed to open the camera!");
+            return;
+        }
+
+        make_1080p(cap);
+        // make_720p(cap);
+        // make_480p(cap);
+        // change_res(cap, 640, 480);
+
+        while (true) {
+            Mat frame = new Mat();
+            cap.read(frame);
+
+            frame = rescaleFrame(frame, 30);
+            HighGui.imshow("frame", frame);
+
+            Mat frame2 = rescaleFrame(frame, 500);
+            HighGui.imshow("frame2", frame2);
+
+            if (HighGui.waitKey(20) == 'q') {
+                break;
+            }
+        }
+
+        cap.release();
+        HighGui.destroyAllWindows();
+    }
+
+    public static void make_1080p(VideoCapture cap) {
+        cap.set(3, 1920);
+        cap.set(4, 1080);
+    }
+
+    public static void make_720p(VideoCapture cap) {
+        cap.set(3, 1020);
+        cap.set(4, 720);
+    }
+
+    public static void make_480p(VideoCapture cap) {
+        cap.set(3, 640);
+        cap.set(4, 480);
+    }
+
+    public static void change_res(VideoCapture cap, int width, int height) {
+        cap.set(3, width);
+        cap.set(4, height);
+    }
+
+    public static Mat rescaleFrame(Mat frame, double percent) {
+        int width = (int) (frame.width() * percent / 100);
+        int height = (int) (frame.height() * percent / 100);
+        Size dim = new Size(width, height);
+        Mat resizedFrame = new Mat();
+        Imgproc.resize(frame, resizedFrame, dim, 0, 0, Imgproc.INTER_AREA);
+        return resizedFrame;
+    }
+}