VXLIB_magnitude_i16s_i16s_o16s

Functions
VXLIB_STATUS	VXLIB_magnitude_i16s_i16s_o16s (const int16_t src0[restrict], const VXLIB_bufParams2D_t *src0_addr, const int16_t src1[restrict], const VXLIB_bufParams2D_t *src1_addr, int16_t dst[restrict], const VXLIB_bufParams2D_t *dst_addr)
VXLIB_STATUS	VXLIB_magnitude_i16s_i16s_o16s_checkParams (const int16_t src0[], const VXLIB_bufParams2D_t *src0_addr, const int16_t src1[], const VXLIB_bufParams2D_t *src1_addr, const int16_t dst[], const VXLIB_bufParams2D_t *dst_addr)

Detailed Description

Function Documentation

VXLIB_magnitude_i16s_i16s_o16s()

VXLIB_STATUS VXLIB_magnitude_i16s_i16s_o16s	(	const int16_t	src0[restrict],
		const VXLIB_bufParams2D_t *	src0_addr,
		const int16_t	src1[restrict],
		const VXLIB_bufParams2D_t *	src1_addr,
		int16_t	dst[restrict],
		const VXLIB_bufParams2D_t *	dst_addr
	)

Description:

This kernel takes two gradients in S16 format and computes the S16 normalized magnitude.

Method:

The magnitude is computed using the following equation:

 dst(x,y) = sqrt(src0(x,y)^2+src1(x,y)^2)

Parameters

[in]	src0[]	Pointer to array containing first gradient input image (SQ15.0)
[in]	src0_addr[]	Pointer to structure containing dimensional information of src0
[in]	src1[]	Pointer to array containing second gradient input image (SQ15.0)
[in]	src1_addr[]	Pointer to structure containing dimensional information of src1
[out]	dst[]	Pointer to array containing magnitude output image (SQ15.0)
[in]	dst_addr[]	Pointer to structure containing dimensional information of dst

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

VXLIB_magnitude_i16s_i16s_o16s_checkParams()

VXLIB_STATUS VXLIB_magnitude_i16s_i16s_o16s_checkParams	(	const int16_t	src0[],
		const VXLIB_bufParams2D_t *	src0_addr,
		const int16_t	src1[],
		const VXLIB_bufParams2D_t *	src1_addr,
		const int16_t	dst[],
		const VXLIB_bufParams2D_t *	dst_addr
	)

Description:

Checks the parameters for programming errors for the VXLIB_magnitude_i16s_i16s_o16s 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

Parameters

[in]	src0[]	Pointer to array containing first gradient input image (SQ15.0)
[in]	src0_addr[]	Pointer to structure containing dimensional information of src0
[in]	src1[]	Pointer to array containing second gradient input image (SQ15.0)
[in]	src1_addr[]	Pointer to structure containing dimensional information of src1
[out]	dst[]	Pointer to array containing magnitude output image (SQ15.0)
[in]	dst_addr[]	Pointer to structure containing dimensional information of dst