How to reduce color noise due to color fringing, a phenomenon that occurs at edges of features creating false color. Color fringing can occur when taking brightfield pictures (histology slides with chromagenic dyes) through a microscope when imaging in color.
How to Reduce Color Noise in GIMP
Follow same steps as in Photoshop except that the Layer Mode is HSL Color.
How to Reduce Color Noise In Image J
Use Photoshop or GIMP