Sample code using Sobel and/or Scharr OpenCV functions to make a simple Edge Detector
Sample screenshot
Check the corresponding tutorial for more details
#include <iostream>
int main( int argc, char** argv )
{
"{@input |lena.jpg|input image}"
"{ksize k|1|ksize (hit 'K' to increase its value at run time)}"
"{scale s|1|scale (hit 'S' to increase its value at run time)}"
"{delta d|0|delta (hit 'D' to increase its value at run time)}"
"{help h|false|show help message}");
cout << "The sample uses Sobel or Scharr OpenCV functions for edge detection\n\n";
cout << "\nPress 'ESC' to exit program.\nPress 'R' to reset values ( ksize will be -1 equal to Scharr function )";
const String window_name = "Sobel Demo - Simple Edge Detector"; int ksize = parser.get<int>("ksize"); int scale = parser.get<int>("scale"); int delta = parser.get<int>("delta");
{
printf("Error opening image: %s\n", imageName.c_str()); return EXIT_FAILURE;
}
for (;;)
{
Mat abs_grad_x, abs_grad_y;
addWeighted(abs_grad_x, 0.5, abs_grad_y, 0.5, 0, grad); if(key == 27)
{
return EXIT_SUCCESS;
}
if (key == 'k' || key == 'K')
{
ksize = ksize < 30 ? ksize+2 : -1;
}
if (key == 's' || key == 'S')
{
scale++;
}
if (key == 'd' || key == 'D')
{
delta++;
}
if (key == 'r' || key == 'R')
{
scale = 1;
ksize = -1;
delta = 0;
}
}
return EXIT_SUCCESS;
}