channels.
* Discrete Fourier transform: implements the forward and inverse DFT.
* Perceptual hash: maps visually identical images to the same or similar
- image hash-- useful in image retrieval, authentication, indexing, or
- copy detection as well as digital watermarking.
+ hash-- useful in image retrieval, authentication, indexing, or copy
+ detection as well as digital watermarking.
* Color management: accurate color management with color profiles or in
lieu of-- built-in gamma compression or expansion as demanded by the
colorspace.