#include <stdio.h>
#include <cstdlib>
{
static float h1[] = { 1, 1, 1};
static float h2[] = {-1, 0, 1};
static array colf(3, 1, h1);
static array rowf(3, 1, h2);
}
{
}
{
float mx = max<float>(in);
float mn = min<float>(in);
return (in-mn)/(mx-mn);
}
{
int w = 5;
if (in.
dims(0) < 512) w = 3;
if (in.
dims(0) > 2048) w = 7;
int h = 5;
if (in.
dims(0) < 512) h = 3;
if (in.
dims(0) > 2048) h = 7;
switch(method) {
case 1: prewitt(mag, dir, smooth); break;
case 2: sobelFilter(mag, dir, smooth); break;
}
return normalize(mag);
}
void edge()
{
array in =
loadImage(ASSETS_DIR
"/examples/images/trees_ctm.jpg",
false);
array prewitt = edge(in, 1);
array sobelFilter = edge(in, 2);
while(!myWindow.close() && !myWindow2.close()) {
myWindow.grid(2, 2);
myWindow(0,0).image(in/255 , "Input Image");
myWindow(0,1).image(prewitt , "Prewitt" );
myWindow(1,0).image(sobelFilter, "Sobel" );
myWindow.show();
myWindow2.hist(hst, 0, 255);
}
}
int main(int argc, char* argv[])
{
int device = argc > 1 ? atoi(argv[1]) : 0;
try {
printf("** ArrayFire Edge Detection Demo **\n");
edge();
fprintf(stderr,
"%s\n", e.
what());
throw;
}
return 0;
}
Window object to render af::arrays.
Definition: graphics.h:37
A multi dimensional data container.
Definition: array.h:27
Definition: exception.h:20
virtual const char * what() const
Definition: exception.h:34
AFAPI array atan2(const array &lhs, const array &rhs)
C++ Interface for arc tan of two arrays.
AFAPI array hypot(const array &lhs, const array &rhs)
C++ Interface for getting length of hypotenuse of two inputs.
AFAPI void setDevice(const int device)
Sets the current device.
AFAPI array gaussianKernel(const int rows, const int cols, const double sig_r=0, const double sig_c=0)
C++ Interface for generating gausian kernels.
AFAPI array histogram(const array &in, const unsigned nbins, const double minval, const double maxval)
C++ Interface for histogram.
AFAPI void sobel(array &dx, array &dy, const array &img, const unsigned ker_size=3)
C++ Interface for extracting sobel gradients.
AFAPI array loadImage(const char *filename, const bool is_color=false)
C++ Interface for loading an image.
dim4 dims() const
Get dimensions of the array.
AFAPI array convolve(const array &signal, const array &filter, const convMode mode=AF_CONV_DEFAULT, const convDomain domain=AF_CONV_AUTO)
C++ Interface for convolution any(one through three) dimensional signals.
Definition: algorithm.h:15