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Hi Gurus, I'm having a challenge to identify and count the light dust particles in an image (attached). Basic thresholding techniques doesn't seem to work as the background starts getting a lot of noise and the count gets off with a lot of margin. In the attached image the bright 4 dots are not among the area of interest but the light noisy pixels that are in the background. Any suggestions on how to tackle this problem would be highly appreciated.
Thanks, Nooh
Hi Gurus, I'm having a challenge to identify and count the light dust particles in an image (attached). Basic thresholding techniques doesn't seem to work as the background starts getting a lot of noise and the count gets off with a lot of margin. In the attached image the bright 4 dots are not among the area of interest but the light noisy pixels that are in the background. Any suggestions on how to tackle this problem would be highly appreciated.
Thanks, Nooh
Thanks a lot Grillteller for your response, much appreciated! I think you are doing the opposite. I need to get that "salt & pepper" noise not the bright spots as those spots can easily be captured via thresholding but the noise starts getting massive if I try to highlight the salt-and-pepper spots via thresholding.
If I threshold this image
I get this (Higher threshold values can totally ignore the salt-dust and will highlight the brighter spots only, so I have to go low)
Here the salt noise is highlighted but with a lot of background noise and will surely mess up the count. What I want is to count those lighter salt dust particles only. I can ignore the brighter blobs later as their size is comparatively larger.
A few light spots to be counted are manually highlighted below;
