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2019-05-24 04:27:37 -0500 marked best answer Detecting Very light particles in an image

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

sample


Edit (11th April, 2019)

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)

image description

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;

image description

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2019-04-11 09:59:56 -0500 commented answer Detecting Very light particles in an image

Thanks for the update. CLAHE seems to be on the right track. Let me try with that too. Thanks again buddy.

2019-04-11 09:58:52 -0500 commented question Detecting Very light particles in an image

Great thoughts, will surely try this as well. Yes, I'm able to remove those brights spots. The only issue I'm having is

2019-04-11 03:45:20 -0500 commented answer Detecting Very light particles in an image

Hi Grillteller, I've updated the question. Will really appreciate if you can review it again.

2019-04-11 03:38:28 -0500 received badge  Editor (source)
2019-04-11 03:38:28 -0500 edited question Detecting Very light particles in an image

Detecting Very light particles in an image Hi Gurus, I'm having a challenge to identify and count the light dust particl

2019-04-10 04:46:38 -0500 commented question Detecting Very light particles in an image

Sorry guys, I didn't get why the question was down-voted. I'm new here so I might have missed some rules. Appreciate if

2019-04-10 04:46:26 -0500 commented question Detecting Very light particles in an image

Sorry guys, I didn't get why the question get down-voted. I'm new here so I might have missed some rules. Appreciate if

2019-04-10 04:40:06 -0500 asked a question Detecting Very light particles in an image

Detecting Very light particles in an image Hi Gurus, I'm having a challenge to identify and count the light dust particl