How to compare two images with iphone sdk?

Question

suppose i have taken one picture from my iphone camera and now i want to compare this image with other images and find best match image from that.

is it possible or not?

Answer 1

ObjectiveC中的图像处理算法可用的帮助非常少，但您可以深入了解Quartz 2D并尝试比较图像，甚至iPhone链接上的图像处理可能会有所帮助。

Answer 2

There is nothing built into the SDK for comparing images, but any C library for image comparison can probably be used. This question has a good discussion on image comparison algorithms.

Answer 3

Are you just comparing the differences between the two images or are you trying to match objects in the images with objects in other images?

If it's the latter then you may need to look into computer vision and stereo image analysis, particularly image rectification and point matching.

Computer Vision - A Modern Approach by Jean Ponce and David Forsyth is a fairly good book.