CopyReplicateBorder

Copies pixels values between two images and adds the replicated border pixels.

Syntax

Case 1: Not-in-place operation

IppStatus ippiCopyReplicateBorder_<mod>(const Ipp<datatype>* pSrc, int srcStep, IppiSize srcRoiSize, Ipp<datatype>* pDst, int dstStep, IppiSize dstRoiSize, int topBorderHeight, int leftBorderWidth);

Supported values for mod:

8u_C1R	16u_C1R	16s_C1R	32s_C1R	32f_C1R
8u_C3R	16u_C3R	16s_C3R	32s_C3R	32f_C3R
8u_C4R	16u_C4R	16s_C4R	32s_C4R	32f_C4R
8u_AC4R	16u_AC4R	16s_AC4R	32s_AC4R	32f_AC4R

Case 2: In-place operation

IppStatus ippiCopyReplicateBorder_<mod>(const Ipp<datatype>* pSrc, int srcDstStep, IppiSize srcRoiSize, IppiSize dstRoiSize, int topBorderHeight, int leftBorderWidth);

Supported values for mod:

8u_C1IR	16u_C1IR	16s_C1IR	32s_C1IR	32f_C1IR
8u_C3IR	16u_C3IR	16s_C3IR	32s_C3IR	32f_C3IR
8u_C4IR	16u_C4IR	16s_C4IR	32s_C4IR	32f_C4IR
8u_AC4IR	16u_AC4IR	16s_AC4IR	32s_AC4IR	32f_AC4IR

Parameters

pSrc	Pointer to the source image ROI.
srcStep	Distance in bytes between starts of consecutive lines in the source image.
pDst	Pointer to the destination image.
dstStep	Distance in bytes between starts of consecutive lines in destination image.
srcDstStep	Distance in bytes between starts of consecutive lines in the source and the destination image.
srcRoiSize	Size of the source ROI in pixels.
dstRoiSize	Size of the destination ROI in pixels.
topBorderHeight	Height of the top border in pixels.
leftBorderWidth	Width of the left border in pixels.

Description

The function ippiCopyReplicateBorder is declared in the ippi.h file. It operates with ROI (see Regions of Interest in Intel IPP).

This function copies the source image pSrc to the destination image pDst and fills pixels ("border") outside the copied area in the destination image with the values of the source image pixels according to the scheme illustrated in Figure Creating a Replicated Border. Squares marked in red correspond to pixels copied from the source image, that is, the source image ROI.

Note that the in-place function flavor actually adds border pixels to the source image ROI, thus a destination image ROI is larger than the initial image.

The parameters topBorderHeight and leftBorderWidth specify the position of the first pixel of the source ROI in the destination image ROI.

Creating a Replicated Border

Example “Using ippiCopyReplicateBorder” shows how to use the ippiCopyReplicateBorder_8u_C1R function.

The height (width) of the destination ROI cannot be less than the sum of the height (width) of source ROI and the topBorderHeight (leftBorderWidth) parameter.

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtrErr	Indicates an error when any of the specified pointers is NULL.
ippStsSizeErr	Indicates an error condition if srcRoiSize or dstRoiSize has a field with a zero or negative value, or topBorderHeight or leftBorderWidth is less than zero, or `dstRoiSize.width < srcRoiSize.width + leftBorderWidth`, or `dstRoiSize.height < srcRoiSize.height + topBorderHeight`.
ippStsStepErr	Indicates an error condition if srcStep or dstStep has a zero or negative value.

Using ippiCopyReplicateBorder

Ipp8u src[8*4] = {5, 4, 3, 4, 5, 8, 8, 8,
                3, 2, 1, 2, 3, 8, 8, 8,
                3, 2, 1, 2, 3, 8, 8, 8,
                5, 4, 3, 4, 5, 8, 8, 8};
Ipp8u dst[9*8];
IppiSize srcRoi = { 5, 4 };
IppiSize dstRoi = { 9, 8 };
int topborderHeight  = 2;
int leftborderWidth  = 2;
		
ippiCopyReplicateBorder_8u_C1R(src, 8, srcRoi, dst, 9, dstRoi, topBorderHeight, leftBorderWidth);

		Results
source image:
5 4 3 4 5 8 8 8
3 2 1 2 3 8 8 8
3 2 1 2 3 8 8 8
5 4 3 4 5 8 8 8
		
destination image:
5 5 5 4 3 4 5 5 5
5 5 5 4 3 4 5 5 5
5 5 5 4 3 4 5 5 5
3 3 3 2 1 2 3 3 3
3 3 3 2 1 2 3 3 3
5 5 5 4 3 4 5 5 5
5 5 5 4 3 4 5 5 5
5 5 5 4 3 4 5 5 5