ImageGear for C and C++ on Linux v20.0 - Updated
API Reference Guide > Core Component API Reference > Core Component Functions Reference > Image Processing Functions > IG_IP_color_reduce_popularity

This function reduces a 24-bit image to an 8-bit image while retaining its most popular, or prevalent, colors.


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AT_ERRCOUNT ACCUAPI IG_IP_color_reduce_popularity ( 
        HIGEAR hIGear, 
        BOOL bFastRemap, 
        UINT nMaxColors 


Name Type Description
hIGear HIGEAR HIGEAR handle of image.
bFastRemap BOOL Set = TRUE for reduction algorithm optimized for speed. Set = FALSE for algorithm optimized for quality.
nMaxColors UINT Number of colors to which to reduce.

Return Value:

Returns the number of ImageGear errors that occurred during this function call.

Supported Raster Image Formats:

RGB – 24 bpp.


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HIGEAR hIGear;     /* HIGEAR handle of image */
/* Reduce to 64 colors using octree algorithm   */
IG_IP_color_reduce_popularity ( hIGear, FALSE, 64 );


Use nMaxColors to specify the maximum number of colors wanted in the result.

See also the section in entitled Color Reduction.
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