Detecting and Calculating the droplet diameter in an image with Low contrast

Question

Yabin Niu 2021-3-1

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https://ww2.mathworks.cn/matlabcentral/answers/759174-detecting-and-calculating-the-droplet-diameter-in-an-image-with-low-contrast

回答： Swetha Polemoni 2021-3-29

Hi

Is there a way to detect the droplets in the attached image and draw a boundary around them with an acceptable accuracy?

My final purpose is to find the diameter of each droplet so that I can calculate the distributions of droplet size.

I have tried to use watershed cutting and imfindcircle, but the effect is not ideal.

Thank you for your help.

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KALYAN ACHARJYA 2021-3-1

You can try with other color models. I got this by simply thresholding in the hsv color space.

Yabin Niu 2021-3-2

Thank you, Sir. I have got a good binary graph through image preprocessing. However, how to realize the perfect circle recognition and diameter statistics on the basis of binary graphics? I have tried to use watershed cutting and imfindcircle, but the current results are not ideal.

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