blending colors ios <p>I want to rectangular crop the eye from one face and paste it on another face, so that in the resulting image skin color of portion of eye blend nicely with the face color of the persons on which we are pasting eyes. I am able to crop and paste, but having problem with blending. Currently, the boundaries of the rectangular cropped eye after pasting are very much visible. I want to reduce this effect, so that the eyes nicely blend with face and resulting image won't look fake.</p>