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need help to detect special structure

I need some help that how can i detect that U point and place circle on it. -tried edge detection (not clear result) image description

need help to detect special structure

I need some help that how can i detect that U point and place circle on it. -tried edge detection (not clear result) Sobel CV_8U (some how works) but how can i encircle tip as below. image description

Sobel CV_8U result: image description

need help to detect special structure

I need some help that how can i detect that U point and place circle on it. -tried edge detection (not clear result) Sobel CV_8U (some how works) but how can i encircle tip as below. below.. image description

Sobel CV_8U result: image description

need help to detect special structure

I need some help that how can i detect that U point and place circle on it. -tried edge detection (not clear result) Sobel CV_8U (some how works) but how can i encircle tip as below.. image description

Sobel CV_8U result: image description

need help to detect special structurewith feature detection

I need have Applied contour (for feature detection) but this don't give me result. Sobel8u, sobelx64, canny I have combined and try different ways to achieve but still not find solution. If any one knows some help algo or some filter to make it clear to view all edges that how can i detect that U point and place circle on it. -tried edge detection (not clear result) Sobel CV_8U (some how works) but how can i encircle tip as below.. be detected by contour feature detection.

image description

Sobel CV_8U result: image description

need help with feature detection

I have Applied contour (for feature detection) but this don't give me result. Sobel8u, sobelx64, canny I have combined and try different ways to achieve but still not find solution. If any one knows some algo or some filter to make it clear to view all edges that can be detected by contour feature detection.

image description

Sobel CV_8U Contour feature detection result: image descriptionimage description

need help with feature detection

I have Applied contour (for feature detection) but this don't give me result. Sobel8u, sobelx64, canny I have combined and try different ways to achieve but still not find solution. If any one knows some algo or some filter to make it clear to view all edges that can be detected by contour feature detection.

image description

Contour feature detection result: image description

need help with contour feature detectiondetector not giving desired result

I have Applied contour (for feature detection) but this don't give me result. Sobel8u, sobelx64, canny I have combined and try different ways to achieve but still not find solution. If any one knows some algo or some filter to make it clear to view all edges that can be detected by contour feature detection.detection or any other feature detection approach

image description

Contour feature detection result: image description