corlor correction within a single image

[James2]

I have a set of UAV images. In EACH image, the center is brighter and the edges (coners) are darker. How to correct it with Photoscan? Does the "color correction" work well on this problem? The "color correction" only works on correcting the color differences AMONG several images, right? Thanks a lot!

[bigben]

I usually do this externally using Adobe Bridge/ACR/Photoshop as part of an image preparation. Either manually set the vignetting correction or use a built in profile if it has one.  This includes any colour correction/contrast tweaking/masking etc...

[James2]

Many thanks, bigben!