VXLIB_erode_MxN_i8u_i8u_o8u

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Detailed Description

Functions
VXLIB_STATUS	VXLIB_erode_MxN_i8u_i8u_o8u (const uint8_t src[restrict], const VXLIB_bufParams2D_t *src_addr, uint8_t dst[restrict], const VXLIB_bufParams2D_t *dst_addr, const uint8_t mask[restrict], const VXLIB_bufParams2D_t *mask_addr)
VXLIB_STATUS	VXLIB_erode_MxN_i8u_i8u_o8u_checkParams (const uint8_t src[restrict], const VXLIB_bufParams2D_t *src_addr, const uint8_t dst[restrict], const VXLIB_bufParams2D_t *dst_addr, const uint8_t mask[restrict], const VXLIB_bufParams2D_t *mask_addr)

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Function Documentation

VXLIB_STATUS VXLIB_erode_MxN_i8u_i8u_o8u	(	const uint8_t	src[restrict],
		const VXLIB_bufParams2D_t *	src_addr,
		uint8_t	dst[restrict],
		const VXLIB_bufParams2D_t *	dst_addr,
		const uint8_t	mask[restrict],
		const VXLIB_bufParams2D_t *	mask_addr
	)

Description:

Implements MxN Erosion, with programmable structuring element mask.

Method:

The output pixels is the min value of the pixels in the TRUE mask regions of the MxN neighborhood of the input pixel.

Parameters:

[in]	src[]	Pointer to array containing input image (UQ8.0)
[in]	src_addr[]	Pointer to structure containing dimensional information of src
[out]	dst[]	Pointer to array containing output image (UQ8.0)
[in]	dst_addr[]	Pointer to structure containing dimensional information of dst
[in]	mask[]	Pointer to array containing mask image (UQ8.0)
[in]	mask_addr[]	Pointer to structure containing dimensional information of mask

Assumptions:

• I/O buffer pointers are assumed to be not aliased.
• Output height should be == (Input height - (Mask height - 1))
• Output width should be == (Input width - (Mask width - 1)) OR (Input width)
• Mask values are either 255 (TRUE), or 0 (FALSE)
• Mask stride should be equal to the mask width
• Minimum dimension of the mask is 1 for both width and height
• Maximum dimension of the mask is 9 for both width and height

Performance Considerations:

• For best performance, the following parameter settings are recommended:
  • Set output width values to a multiple of 16
  • Set widths equal to each other and equal to strides (allows processing over whole image in single loop)

VXLIB_STATUS VXLIB_erode_MxN_i8u_i8u_o8u_checkParams	(	const uint8_t	src[restrict],
		const VXLIB_bufParams2D_t *	src_addr,
		const uint8_t	dst[restrict],
		const VXLIB_bufParams2D_t *	dst_addr,
		const uint8_t	mask[restrict],
		const VXLIB_bufParams2D_t *	mask_addr
	)

Description:

Checks the parameters for programming errors for the VXLIB_erode_MxN_i8u_i8u_o8u function.

Method:

The following checks are made:

• There shall be no NULL pointers
• Output height should be == (Input height - (Mask height - 1))
• Output width should be <= Input width
• The strides of each image shall be equal to or greater than the x dimension
• The min value for mask width and height should be 1
• The max value for mask width and height should be 9
• The mask width should be equal to the stride

Parameters:

[in]	src[]	Pointer to array containing input image (UQ8.0)
[in]	src_addr[]	Pointer to structure containing dimensional information of src
[out]	dst[]	Pointer to array containing output image (UQ8.0)
[in]	dst_addr[]	Pointer to structure containing dimensional information of dst
[in]	mask[]	Pointer to array containing mask image (UQ8.0)
[in]	mask_addr[]	Pointer to structure containing dimensional information of mask

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