 | 1 | initial version |
Hi,
How can I detect a crescent shape? I have a binary image where the crescent is in white and the rest is black. There could be some noise and other shape in the image too. I tried with Hough circle but since it's not a complete circle, it detect other circle from the noise instead of the one in the crescent.
I was thinking about using shape comparison with contour but since a crescent is a complex polygon, I'm not sure it will work.
Any ideas on how to approach this problem?
| | 2 | add an example picture |
Hi,
How can I detect a crescent shape? I have a binary image where the crescent is in white and the rest is black. There could be some noise and other shape in the image too. I tried with Hough circle but since it's not a complete circle, it detect other circle from the noise instead of the one in the crescent.
I was thinking about using shape comparison with contour but since a crescent is a complex polygon, I'm not sure it will work.
Here is an example:
Any ideas on how to approach this problem?
| | 3 | good picture this time |
Hi,
How can I detect a crescent shape? I have a binary image where the crescent is in white and the rest is black. There could be some noise and other shape in the image too. I tried with Hough circle but since it's not a complete circle, it detect other circle from the noise instead of the one in the crescent.
I was thinking about using shape comparison with contour but since a crescent is a complex polygon, I'm not sure it will work.
Here is an example:
Any ideas on how to approach this problem?
| | 4 | add details about what I'm really searching. |
Hi,
How can I detect a crescent shape? I have a binary image where the crescent is in white and the rest is black. There could be some noise and other shape in the image too. I tried with Hough circle but since it's not a complete circle, it detect other circle from the noise instead of the one in the crescent.
I was thinking about using shape comparison with contour but since a crescent is a complex polygon, I'm not sure it will work.
Here is an example:
Any ideas on how to approach this problem?
EDIT
I know how to dilate and erode the image above to get a cleaner image. What I'm interested in is how to detect that it's a crescent.
