MagickGetImageExtrema

MagickGetImageExtrema -- returns the extrema for one or more images, or image channels

Description

array MagickGetImageExtrema( MagickWand mgck_wnd [, int channel_type] )

Returns the extrema for one or more images, or image channels. Returns an array if successful, FALSE if an error occurred. Returned array is defined as follows: Array { [0] => the minimum pixel value for the specified channel(s) [1] => the maximum pixel value for the specified channel(s) } If the optional channel_depth parameter is specified, MagickGetImageChannelExtrema() is called on the particular image channel. channel_type must be a ChannelType constant, one of the following: MW_RedChannel MW_CyanChannel MW_GreenChannel MW_MagentaChannel MW_BlueChannel MW_YellowChannel MW_AlphaChannel MW_OpacityChannel MW_BlackChannel MW_IndexChannel MW_AllChannels

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A description of each parameter follows:

mgck_wnd	A MagickWand resource
channel_type	(OPTIONAL) ChannelType constant