#include "edge_roberts.h"

EdgeRoberts::EdgeRoberts(PNM* img) :
    EdgeGradient(img)
{
    prepareMatrices();
}

EdgeRoberts::EdgeRoberts(PNM* img, ImageViewer* iv) :
    EdgeGradient(img, iv)
{
    prepareMatrices();
}

void EdgeRoberts::prepareMatrices()
{
    g_x = math::matrix<float>(2, 2, {1, 0, 0, -1});
    g_y = math::matrix<float>(2, 2, {0, 1, -1, 0});
}