Specifications

User Defined Functions
13-5
13
If saturation of the computed result is necessary, it must be provided within
the user function.
The user function of type IplUserFuncPixel may call IPL_ERROR to set
the IPL error status.
See
iplUserProcessPixel() for more information.
UserProcess
Calls user-defined function
to separately process each
channel value of pixels in an
image with integer data.
void iplUserProcess( IplImage* srcImage , IplImage*
dstImage , IplUserFunc cbFunc );
srcImage Thesourceimage.
dstImage The destination image.
cbFunc The pointer to the user-defined function (of
IplUserFunc type).
Discussion
The function iplUserProcess() scans pixels of a source image
srcImage , retrieves respective channel values, and passes them to the user-
defined function
cbFunc for processing.
The source image must contain integer data of 8-, 16-, or 32-bit depth.
Before passing channel values to
cbFunc , the function
iplUserProcess() converts them to int type.
After processing by
cbFunc , the returned values are saturated to the
destination data range, and written to the respective channel of the
destination image
dstImage . The saturation is done only for 8- or 16-bit