How to determine the blurness of an image after using the canny filter?

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I would like to get a "blurness" value after using the cannyfilter on a siemensstar image, to check the blurness level. After usind the canny filter you can identify that the sharper image has more lines than the blurry one. So what would be the next step after the canny filtering?


Question:
How can I determine now which image is sharper? Do I need to check the mean value of the histogram or…?

Thanks

What I have tried:

I tried to use the mean value of the histogram after the canny filter but the value does not correspond to the image at all.

Posted 21-Jun-23 2:43am

Member 15902014

Updated 21-Jun-23 3:38am

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Richard MacCutchan · Answer 1 · 2023-06-21T03:38:00

Solution 1

See canny filter - Google Search[^] for further information.

Posted 21-Jun-23 3:38am

Richard MacCutchan

Comments

Member 15902014 21-Jun-23 9:58am

The question is NOT what the canny filter is, rather HOW to identify AFTER using the canny filter which image is more in focus (sharper).

Richard MacCutchan 21-Jun-23 10:05am

I understand that, so you need to go and read some of those links to find out which is the best option.

Member 15902014 23-Jun-23 3:05am

well ok, but this is actually my question at the end

Richard MacCutchan 23-Jun-23 3:12am

At the risk of repeating myself, "yes, I understand that". But it is a "how to" question, not a specific error in some lines of code that you have written. So you need to research the different features of image processing to find out how to do it.