#include <cmath>
#include <cstdio>
#include <cstdlib>
array changeContrast(
const array &in, 
const float contrast)
 
{
    return (((in / 255.0f - 0.5f) * scale + 0.5f) * 255.0f);
}
array changeBrightness(
const array &in, 
const float brightness, 
const float channelMax = 255.0f)
 
{
    float factor = brightness*channelMax;
    return (in + factor);
}
{
    return ((in<
min)*0.0f + (in>
max)*255.0f + (in >= 
min && in <= 
max)*in);
 
}
array usm(
const array &in, 
float radius, 
float amount)
 
{
    int gKernelLen = 2 * radius + 1;
    return (in + amount*(in - blur));
}
array digZoom(
const array &in, 
int x, 
int y, 
int width, 
int height)
 
{
}
{
        tiledMask = 
tile(mask, 1, 1, a.
dims(2));
    return a*tiledMask + (1.0f - tiledMask)*b;
}
void normalizeImage(
array &in)
 
{
    float min = af::min<float>(in);
 
    float max = af::max<float>(in);
 
    in = 255.0f*((in - 
min) / (max - min));
}
{
    normalizeImage(ret_val);
    return ret_val;
}
int main(int argc, char **argv)
{
    try {
        int device = argc > 1 ? atoi(argv[1]) : 0;
        array fight = 
loadImage(ASSETS_DIR 
"/examples/images/fight.jpg", 
true);
 
        array mask = clamp(intensity, 10.0f, 255.0f)>0.0f;
 
        array blend = alphaBlend(fight, nature, mask);
 
        array highcon = changeContrast(man, 0.3);
 
        array highbright = changeBrightness(man, 0.2);
 
        array sharp = usm(man, 3, 1.2);
 
        array zoom = digZoom(man, 28, 10, 192, 192);
 
        array bdry = boundary(man, morph_mask);
 
        std::cout << "Press ESC while the window is in focus to exit" << std::endl;
        while (!wnd.close()) {
            wnd.grid(2, 5);
            wnd(0, 0).image(man / 255, "Input");
            wnd(1, 0).image(highcon / 255, "High Contrast");
            wnd(0, 1).image(highbright / 255, "High Brightness");
            wnd(1, 1).image(translated / 255, "Translation");
            wnd(0, 2).image(sharp / 255, "Unsharp Masking");
            wnd(1, 2).image(zoom / 255, "Digital Zoom");
            wnd(0, 3).image(nature / 255, "Background for blend");
            wnd(1, 3).image(fight / 255, "Foreground for blend");
            wnd(0, 4).image(blend / 255, "Alpha blend");
            wnd(1, 4).image(bdry / 255, "Boundary extraction");
            wnd.show();
        }
    }
        fprintf(stderr, 
"%s\n", e.
what());
        throw;
    }
#ifdef WIN32 // pause in Windows
    if (!(argc == 2 && argv[1][0] == '-')) {
        printf("hit [enter]...");
        fflush(stdout);
        getchar();
    }
#endif
    return 0;
}