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zadanie - 11 (harris)

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This commit is contained in:
Patrycjusz Mania 2021-06-18 08:28:13 +02:00
parent bee9d1f89c
commit 1e1c4c2a5e
2 changed files with 101 additions and 16 deletions
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96
src/core/transformations/corner_harris.cpp
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@ -26,7 +26,101 @@ PNM* CornerHarris::transform()
PNM* newImage = new PNM(width, height, QImage::Format_Mono);
qDebug() << Q_FUNC_INFO << "Not implemented yet!";
math::matrix<float> xx(width, height);
math::matrix<float> yy(width, height);
math::matrix<float> xy(width, height);
math::matrix<float> cornerCandidates(width, height);
math::matrix<float> cornerNonmaxSuppress(width, height);
for (int x = 0; x < width; x++)
for (int y = 0; y < height; y++) {
xx(x,y) = yy(x,y) = xy(x,y) = cornerCandidates(x,y) = cornerNonmaxSuppress(x,y) = 0;
}
ConversionGrayscale conversionGrayscale(image);
image = conversionGrayscale.transform();
BlurGaussian blurGaussian(image);
blurGaussian.setParameter("size", 3);
blurGaussian.setParameter("sigma", 1.0);
image = blurGaussian.transform();
EdgeSobel edgeSobel(image);
math::matrix<float>* Gx = edgeSobel.rawHorizontalDetection();
math::matrix<float>* Gy = edgeSobel.rawVerticalDetection();
for (int i = 0; i < width; i++){
for (int j = 0; j < height; j++) {
xx(i,j) = (*Gx)(i,j) * (*Gx)(i,j);
yy(i,j) = (*Gy)(i,j) * (*Gy)(i,j);
xy(i,j) = (*Gx)(i,j) * (*Gy)(i,j);
}
}
for (int i = 1; i < width - 1; i++){
for (int j = 1; j < height - 1; j++) {
float Sxx = 0, Syy = 0, Sxy = 0;
for (int k = -1; k < 2; k++)
for (int l = -1; l < 2; l++) {
float gauss = BlurGaussian::getGauss(k,l,sigma);
Sxx = Sxx + xx(i+k, j+l)*gauss;
Syy = Syy + yy(i+k, j+l)*gauss;
Sxy = Sxy + xy(i+k, j+l)*gauss;
}
Sxx = Sxx/sigma_weight;
Syy = Syy/sigma_weight;
Sxy = Sxy/sigma_weight;
math::matrix<float> H(2,2);
H(0,0) = Sxx;
H(0,1) = H(1,0) = Sxy;
H(1,1) = Syy;
float detH = H(0,0)*H(1,1) - H(0,1)*H(1,0);
float trH = H(0,0) + H(1,1);
float r = detH - k_param * pow(trH, 2);
if (r > threshold)
cornerCandidates(i,j) = r;
}
}
bool search = true;
while (search) {
search = false;
for (int i = 1; i < width - 1; i++)
for (int j = 1; j < height - 1; j++) {
bool max = true;
for (int k = -1; k < 2; k++)
for (int l = -1; l < 2; l++) {
if ((k!=0 || l!=0) && cornerCandidates(i+k, j+l) >= cornerCandidates(i,j))
max = false;
}
if (max)
cornerNonmaxSuppress(i,j) = cornerCandidates(i,j);
else {
if (cornerCandidates(i,j) > 0)
search = true;
cornerNonmaxSuppress(i,j) = 0;
}
}
cornerCandidates = cornerNonmaxSuppress;
}
for (int i = 0; i < width; i++)
for (int j = 0; j < height; j++) {
if (cornerCandidates(i,j) == 0)
newImage->setPixel(i,j,Qt::color0);
else
newImage->setPixel(i,j,Qt::color1);
}
return newImage;
}

21
src/core/transformations/edge_sobel.cpp
View File

@ -32,15 +32,11 @@ math::matrix<float>* EdgeSobel::rawHorizontalDetection()
int height = image->height();
math::matrix<float>* x_gradient = new math::matrix<float>(width, height);
PNM* newImage = convolute(g_x, RepeatEdge);
for (int x=0;x<width;++x) {
for (int y=0;y<height;++y) {
(*x_gradient)[x][y] = qGray(newImage->pixel(x,y));
}
for (int x = 0; x < width; x++)
for (int y = 0; y < height; y++) {
(*x_gradient)(x,y) = sum(join(g_x, getWindow(x, y, 3, LChannel, RepeatEdge)));
}
delete newImage;
return x_gradient;
}
@ -50,15 +46,10 @@ math::matrix<float>* EdgeSobel::rawVerticalDetection()
int height = image->height();
math::matrix<float>* y_gradient = new math::matrix<float>(width, height);
PNM* newImage = convolute(g_y, RepeatEdge);
for (int x=0;x<width;++x) {
for (int y=0;y<height;++y) {
(*y_gradient)[x][y] = qGray(newImage->pixel(x,y));
}
for (int x = 0; x < width; x++)
for (int y = 0; y < height; y++) {
(*y_gradient)(x,y) = sum(join(g_y, getWindow(x, y, 3, LChannel, RepeatEdge)));
}
delete newImage;
return y_gradient;
}