Satellite Imagery retouch....

Hello,

I would like to find someone who retouch satellite images and wonder how to use photoshop at satellite image.

In my case, for registration issue,

I only use sponge tool because everything that moves is on the road.

road color is gray.. It seems to be natural.

and I want to make images brighter but if I retouch satellite image

(I control brightness/contrast, level, curves, vibrance, color balance filter etc.)

each object's mid-shade value disappears.

I use 2 layers which are Brightness retouch layer and Original data layer to save mid-shade value.

and I use lasso tool, then I cut each object and delete.

Please kindly do me a favor to retouch satellite imagery better using Photoshop program.