AES encryption for images
What do you mean "AES is not recommended for highly-redundant images"?

Perhaps you're referring to "ECB mode is not recommended for highly-redundant images" (and yes, AES can be used for ECB mode).

Yes, AES in ECB mode is not recommended for highly-redundant images, because it doesn't disguise when two 128 bit plaintext blocks are exactly the same.  Here is a famous example of a drawing of the Linux penguin encrypted using ECB mode:



As you can see, you can make out significant details of the original image.

AES in other modes (CBC, CFB, Ctr, GCM) doesn't have this weakness, and so are strongly preferred.