libjpeg

A word about functions *not* provided by the library.  We handle a subset of
the ISO JPEG standard; most baseline, extended-sequential, and progressive
JPEG processes are supported.  (Our subset includes all features now in common
use.)  Unsupported ISO options include:
        * Hierarchical storage
        * Lossless JPEG
        * DNL marker
        * Nonintegral subsampling ratios
We support 8-bit to 12-bit data precision, but this is a compile-time choice
rather than a run-time choice; hence it is difficult to use different
precisions in a single application.

高速化

libjpeg-turbo

SIMD

http://cetus.sakura.ne.jp/softlab/jpeg-x86simd/jpegsimd.html

idct scaling decode

New djpeg -scale N/8 with all N=1...16 feature
- http://jpegclub.org/djpeg/

使い方

JPEGファイルの入出力
- http://www.syuhitu.org/other/jpeg/jpeg.html
[programing][C/C++][gail] jpeglibの勉強
- http://d.hatena.ne.jp/MaD/20070302

recent(20)

高速化

SIMD

idct scaling decode

使い方

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ファイルを介さずメモリ上で処理