56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
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#include "edge_sobel.h"
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#include <iostream>
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EdgeSobel::EdgeSobel(PNM* img, ImageViewer* iv) :
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EdgeGradient(img, iv)
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{
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prepareMatrices();
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}
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EdgeSobel::EdgeSobel(PNM* img) :
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EdgeGradient(img)
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{
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prepareMatrices();
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}
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void EdgeSobel::prepareMatrices()
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{
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g_x = math::matrix<float>(3, 3, {-1, 0, 1, -2, 0, 2, -1, 0, 1});
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g_y = math::matrix<float>(3, 3, {-1, -2, -1, 0, 0, 0, 1, 2, 1});
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}
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math::matrix<float>* EdgeSobel::rawHorizontalDetection()
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{
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int width = image->width();
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int height = image->height();
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math::matrix<float>* x_gradient = new math::matrix<float>(width, height);
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for (int i = 0; i < width; i++)
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{
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for (int j = 0; j < height; j++)
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{
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(*x_gradient)(i, j) = sum(join(g_x, getWindow(i, j, 3, LChannel, RepeatEdge)));
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}
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}
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return x_gradient;
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}
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math::matrix<float>* EdgeSobel::rawVerticalDetection()
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{
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int width = image->width();
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int height = image->height();
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math::matrix<float>* y_gradient = new math::matrix<float>(width, height);
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math::matrix<float> window;
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for (int i = 0; i < width; i++)
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{
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for (int j = 0; j < height; j++)
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{
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(*y_gradient)(i, j) = sum(join(g_y, getWindow(i, j, 3, LChannel, RepeatEdge)));
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}
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}
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return y_gradient;
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}
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