Contrast and brightness works open issues:
Contrast and brightness works
open issues:

- each algorithm do loop on image data separately (can perform better)
- when control change while in process - older threads should be killed
- multi imageries: when same overlay over side by side, image-process-controls should be managed separately
- saving as case not supported (require server-side change)

AnSyn/ansyn,AnSyn/ansyn,AnSyn/ansyn,AnSyn/ansyn