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Intel_C_21
Beginner
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About IPP Function "DemosaicAHD"

Hi!

My current research work is focused in image processing and algorithms for CFA interpolation. I would like to perform some experiments with the algorithms for RGB image restoration from the grayscale CFA image, implemented in Intel IPP library -  CFAToRGB and DemosaicAHD.

I am new in using this library. I have troubles with understanding the meaning of parameter “pTmp” of function DemosaicAHD.

In the function description it is written that: “The algorithm requires “the temporary image pTmp of size (srcRoi.width +6, 30)” to be defined and passed during the function call. Could someone to help me to understand:

  1. What the purpose of the temporary image is and what determines this size for the temporary image?

  2. How to define / create this image? Which IPP method to use for allocating memory?

Thanks in advance,

Iva

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Andrey_B_Intel
Employee
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Hi.

Thanks for your interest to IPP library.  

Temporal image pTmp is internal memory buffer of function for speedup calculations. 

This function requires temp buffer of Ipp8u data size of width = (srcRoi.width +6) and height = 30 where srcRoi is size of image to be processed. So you need just to call pTmp =  ippsMalloc_8u( (srcRoi.width+6)*30).  You can provide this buffer again for images with smaller width but need to allocate new buffer for images with bigger width.

Thanks.

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