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Working With Images

This section discusses the functions that allow your application to compress and decompress single-frame images stored as pixel maps (of data type PixMap ). See Working With Sequences for information on compressing and decompressing sequences of images. See Working With Pictures and PICT Files for information on compressing and manipulating single-frame images stored as pictures or picture files (in PICT format).

The Image Compression Manager provides two sets of functions for compressing and decompressing images. If you do not need to assert a lot of control over the compression operation, you can use the CompressImage and DecompressImage functions to work with compressed images. If you need more control over the compression parameters, you can use the FCompressImage and FDecompressImage functions.

You can convert a compressed image from one compression format to another by calling the ConvertImage function.

You can alter the spatial characteristics of a compressed image by calling the TrimImage function.

You can work with an image’s color table with the SetImageDescriptionCTable and GetImageDescriptionCTable functions.

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