diff --git a/src/core/transformations/corner_harris.cpp b/src/core/transformations/corner_harris.cpp
index f8979cf..8855029 100644
--- a/src/core/transformations/corner_harris.cpp
+++ b/src/core/transformations/corner_harris.cpp
@@ -26,7 +26,111 @@ PNM* CornerHarris::transform()
 
     PNM* newImage = new PNM(width, height, QImage::Format_Mono);
 
-    qDebug() << Q_FUNC_INFO << "Not implemented yet!";
+    math::matrix<float> matrix_xx(width, height);
+    math::matrix<float> matrix_yy(width, height);
+    math::matrix<float> matrix_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++) {
+            matrix_xx(x,y) = 0;
+            matrix_yy(x,y) = 0;
+            matrix_xy(x,y) = 0;
+            cornerCandidates(x,y) = 0;
+            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++) {
+            matrix_xx(i,j) = (*Gx)(i,j) * (*Gx)(i,j);
+            matrix_yy(i,j) = (*Gy)(i,j) * (*Gy)(i,j);
+            matrix_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 summa_xx = 0, summa_yy = 0, summa_xy = 0;
+
+            for (int k = -1; k < 2; k++)
+                for (int l = -1; l < 2; l++) {
+                    float gauss = BlurGaussian::getGauss(k,l,sigma);
+                    summa_xx = summa_xx + matrix_xx(i+k, j+l)*gauss;
+                    summa_yy = summa_yy + matrix_yy(i+k, j+l)*gauss;
+                    summa_xy = summa_xy + matrix_xy(i+k, j+l)*gauss;
+                }
+
+            summa_xx = summa_xx/sigma_weight;
+            summa_yy = summa_yy/sigma_weight;
+            summa_xy = summa_xy/sigma_weight;
+
+            math::matrix<float> H(2,2);
+            H(0,0) = summa_xx;
+            H(0,1) = H(1,0) = summa_xy;
+            H(1,1) = summa_yy;
+
+            float detH = summa_xx*summa_yy - summa_xy*summa_xy;
+            float trH = summa_xx + summa_yy;
+            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;
+
+
+
+                if (
+                        cornerCandidates(i-1, j-1) < cornerCandidates(i,j) &&
+                        cornerCandidates(i, j-1) < cornerCandidates(i,j) &&
+                        cornerCandidates(i+1, j-1) < cornerCandidates(i,j) &&
+                        cornerCandidates(i+1, j) < cornerCandidates(i,j) &&
+                        cornerCandidates(i+1, j+1) < cornerCandidates(i,j) &&
+                        cornerCandidates(i, j+1) < cornerCandidates(i,j) &&
+                        cornerCandidates(i-1, j+1) < cornerCandidates(i,j) &&
+                        cornerCandidates(i-1, j) < cornerCandidates(i,j)
+                   )
+                    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;
 }