The tags computer-vision (1,393 questions tagged, 450 followers):
Computer vision enables images, or sequences of images, to be processed by a computer using an algorithm. The aim of the algorithm is to extract information from the image. Sometimes this information produces an updated image or sometimes other measurements. An example of an updated image is to ...
and image-processing (7,338 questions tagged, 858 followers)
Algorithms which extract and manipulate information from digital images.
should be synonyms.
As there are more questions and more followers to image-processing this could be the new master. On the other hand computer-vision has a better tag wiki and it is already master to machine-vision. A hard decision.