Classes
Here are the data structures with brief descriptions:
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 NDepage
 NGraphics
 NExceptions
 CExceptionGeneral graphics related exception class
 CFileNotFoundInput file not found exception
 NOptimizers
 CJpegoptim
 CJpegtran
 COptimizer
 COptipng
 CPngcrush
 NProviders
 CGdPHP GD extension interface
 CGraphicsmagickGraphicsMagick interface
 CImagemagickImageMagick interface
 CImagickImagick Class Imagick
 NUi
 CGraphicsInterface for accessing graphics via URI
 CGraphicsMain graphics class
 CImgurl