get rid unwanted dots

I'd like to get rid of the tiny colored dots that conceal the red lines. Kindly help if you can.

[DGM]

How is this image being created? It will probably be easier to prevent the problem than try fixing the damage caused by artifacts.

Answer 1

[Image Analyst]

Those are jpeg compression artifacts. That's why you should never use jpg format for image analysis. Use PNG format instead.