OpenCVTest.java

package org.mitallast.queue;

import org.bytedeco.javacpp.Loader;
import org.bytedeco.javacpp.opencv_core.Mat;
import org.bytedeco.javacpp.opencv_core.Size;

import static org.bytedeco.javacpp.opencv_imgcodecs.imread;
import static org.bytedeco.javacpp.opencv_imgcodecs.imwrite;
import static org.bytedeco.javacpp.opencv_imgproc.CV_INTER_AREA;
import static org.bytedeco.javacpp.opencv_imgproc.resize;

public class OpenCVTest {
    static {
        Loader.load(org.bytedeco.javacpp.opencv_core.class);
        Loader.load(org.bytedeco.javacpp.opencv_imgcodecs.class);
        Loader.load(org.bytedeco.javacpp.opencv_imgproc.class);
    }

    public static void main(String... args) throws Exception {
        long start = System.currentTimeMillis();
        for (int i = 0; i < 1000; i++) {
            Mat source = imread("cats.jpg");
            Mat dest = new Mat();
            Size sz = new Size(100, 100);
            resize(source, dest, sz, 0.0, 0.0, CV_INTER_AREA);
            imwrite("cats.resized.jpg", dest);
        }
        long end = System.currentTimeMillis();
        printQps("opencv", 1000, start, end);
    }

    private static void printQps(String metric, long total, long start, long end) {
        long qps = (long) (total / (double) (end - start) * 1000.);
        System.out.println(metric + ": " + total + " at " + (end - start) + "ms");
        System.out.println(metric + ": " + qps + " qps");
    }
}