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

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Yabin Niu
Yabin Niu 2021-3-1
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.
  2 个评论
KALYAN ACHARJYA
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
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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回答（1 个）

Swetha Polemoni
Swetha Polemoni 2021-3-29
Hi
It is my ynderstanding that you want to find the diameter of the circles/droplets in the image. You can do it using regionprops .
Here is an example for understanding the estimation of radii and centroid of circular object in an image.

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