VXLIB_accumulateWeightedImage_i8u_io8u

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Detailed Description

Functions
VXLIB_STATUS	VXLIB_accumulateWeightedImage_i8u_io8u (const uint8_t src[restrict], const VXLIB_bufParams2D_t *src_addr, uint8_t dst[restrict], const VXLIB_bufParams2D_t *dst_addr, VXLIB_F32 alpha)
VXLIB_STATUS	VXLIB_accumulateWeightedImage_i8u_io8u_checkParams (const uint8_t src[], const VXLIB_bufParams2D_t *src_addr, const uint8_t dst[], const VXLIB_bufParams2D_t *dst_addr, VXLIB_F32 alpha)

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Function Documentation

VXLIB_STATUS VXLIB_accumulateWeightedImage_i8u_io8u	(	const uint8_t	src[restrict],
		const VXLIB_bufParams2D_t *	src_addr,
		uint8_t	dst[restrict],
		const VXLIB_bufParams2D_t *	dst_addr,
		VXLIB_F32	alpha
	)

Description:

Accumulates a weighted value from an input image to an output image.

Method:

Weighted accumulation is computed by:

    dst(x,y) = (1alpha)*dst(x,y) + alpha*src(x,y)

   

Parameters:

[in]	src[]	Pointer to array containing first input image (UQ8.0)
[in]	src_addr[]	Pointer to structure containing dimensional information of src
[in,out]	dst[]	Pointer to array containing output image (UQ8.0)
[in]	dst_addr[]	Pointer to structure containing dimensional information of dst
[in]	alpha	Parameter indicating weight for src and dst (0.0 <= alpha <= 1.0)

Assumptions:

• I/O buffer pointers are assumed to be not aliased.

Performance Considerations:

• For best performance, the following parameter settings are recommended:
  • Set widths equal to strides
  • Align all pointers to 8 byte boundaries
  • Set all stride values to a multiple of 8
  • Set all width values to a multiple of 8

VXLIB_STATUS VXLIB_accumulateWeightedImage_i8u_io8u_checkParams	(	const uint8_t	src[],
		const VXLIB_bufParams2D_t *	src_addr,
		const uint8_t	dst[],
		const VXLIB_bufParams2D_t *	dst_addr,
		VXLIB_F32	alpha
	)

Description:

Checks the parameters for programming errors for the VXLIB_accumulateImage_i8u_io16s function.

Method:

The following checks are made:

• There shall be no NULL pointers
• All images shall have the same x and y dimensions
• The strides of each image shall be equal to or greater than the x dimension
• The alpha parameter shall be (0.0 <= alpha <= 1.0)

Parameters:

[in]	src[]	Pointer to array containing first input image (UQ8.0)
[in]	src_addr[]	Pointer to structure containing dimensional information of src
[in,out]	dst[]	Pointer to array containing output image (UQ8.0)
[in]	dst_addr[]	Pointer to structure containing dimensional information of dst
[in]	alpha	Parameter indicating weight for src and dst (0.0 <= alpha <= 1.0)

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