graphics/histogram.cpp

/*******************************************************
 * Copyright (c) 2014, ArrayFire
 * All rights reserved.
 *
 * This file is distributed under 3-clause BSD license.
 * The complete license agreement can be obtained at:
 * http://arrayfire.com/licenses/BSD-3-Clause
 ********************************************************/
 
#include <arrayfire.h>
#include <math.h>
#include <cstdio>
 
using namespace af;
 
int main(int, char**) {
    try {
        // Initialize the kernel array just once
        af::info();
        af::Window myWindow(512, 512, "Histogram example using ArrayFire");
        af::Window imgWnd(480, 640, "Input Image");
 
        array img = loadImage(ASSETS_DIR "/examples/images/arrow.jpg", false);
        array hist_out = histogram(img, 256, 0, 255);
 
        myWindow.setAxesTitles("Bins", "Frequency");
        myWindow.setPos(480, 0);
 
        while (!myWindow.close() && !imgWnd.close()) {
            myWindow.hist(hist_out, 0, 255);
            imgWnd.image(img.as(u8));
        }
    }
 
    catch (af::exception& e) {
        fprintf(stderr, "%s\n", e.what());
        throw;
    }
    return 0;
}