Hi Alexey,
Continue with the similar phenomenon, I had some photos being adjusted the contrast due to they were too dark, then I processed them with other original photos together (I found the contrast function in PS can only work for one chunk, if merged the photos will lose the adjusted contrast). However, the adjusted photos had almost less than 1cm for all the GCPs' RMS in PS after reoptimised, but when the DEM was generated, the elevation differences compared to the GCPs can reach up to 0.4m.
Is this due to the adjusted photos? Except the contrast it shouldn't modified any other things. Also many GCPs are 0.001 m in RMS after reoptimised.
Could you give some hints?
Thanks a lot.