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fix missing 0.5 factor in anisotropic segmentation tutorial

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dmici
2020-08-30 10:17:50 +02:00
parent 7ce56b3a47
commit 6876f3b91d
3 changed files with 11 additions and 9 deletions
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samples/cpp/tutorial_code/ImgProc/anisotropic_image_segmentation/anisotropic_image_segmentation.cpp
+6 -4
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@@ -74,8 +74,8 @@ void calcGST(const Mat& inputImg, Mat& imgCoherencyOut, Mat& imgOrientationOut,
// GST components calculation (stop)
// eigenvalue calculation (start)
// lambda1 = J11 + J22 + sqrt((J11-J22)^2 + 4*J12^2)
// lambda2 = J11 + J22 - sqrt((J11-J22)^2 + 4*J12^2)
// lambda1 = 0.5*(J11 + J22 + sqrt((J11-J22)^2 + 4*J12^2))
// lambda2 = 0.5*(J11 + J22 - sqrt((J11-J22)^2 + 4*J12^2))
Mat tmp1, tmp2, tmp3, tmp4;
tmp1 = J11 + J22;
tmp2 = J11 - J22;
@@ -84,8 +84,10 @@ void calcGST(const Mat& inputImg, Mat& imgCoherencyOut, Mat& imgOrientationOut,
sqrt(tmp2 + 4.0 * tmp3, tmp4);
Mat lambda1, lambda2;
lambda1 = tmp1 + tmp4; // biggest eigenvalue
lambda2 = tmp1 - tmp4; // smallest eigenvalue
lambda1 = tmp1 + tmp4;
lambda1 = 0.5*lambda1; // biggest eigenvalue
lambda2 = tmp1 - tmp4;
lambda2 = 0.5*lambda2; // smallest eigenvalue
// eigenvalue calculation (stop)
// Coherency calculation (start)
samples/python/tutorial_code/imgProc/anisotropic_image_segmentation/anisotropic_image_segmentation.py
+4 -4
View File
@@ -31,16 +31,16 @@ def calcGST(inputIMG, w):
# GST components calculations (stop)
# eigenvalue calculation (start)
# lambda1 = J11 + J22 + sqrt((J11-J22)^2 + 4*J12^2)
# lambda2 = J11 + J22 - sqrt((J11-J22)^2 + 4*J12^2)
# lambda1 = 0.5*(J11 + J22 + sqrt((J11-J22)^2 + 4*J12^2))
# lambda2 = 0.5*(J11 + J22 - sqrt((J11-J22)^2 + 4*J12^2))
tmp1 = J11 + J22
tmp2 = J11 - J22
tmp2 = cv.multiply(tmp2, tmp2)
tmp3 = cv.multiply(J12, J12)
tmp4 = np.sqrt(tmp2 + 4.0 * tmp3)
lambda1 = tmp1 + tmp4 # biggest eigenvalue
lambda2 = tmp1 - tmp4 # smallest eigenvalue
lambda1 = 0.5*(tmp1 + tmp4) # biggest eigenvalue
lambda2 = 0.5*(tmp1 - tmp4) # smallest eigenvalue
# eigenvalue calculation (stop)
# Coherency calculation (start)