Detailed Description

Computes the absolute difference between two images. The output image dimensions should be the same as the dimensions of the input images.

Absolute Difference is computed by:

\[ out(x,y) = |in_1(x,y) - in_2(x,y)| \]

If one of the input images is of type VX_DF_IMAGE_S16, all values are converted to vx_int32 and the overflow policy VX_CONVERT_POLICY_SATURATE is used.

\[ out(x,y) = saturate_{int16} ( |(int32)in_1(x,y) - (int32)in_2(x,y)| ) \]

The output image can be VX_DF_IMAGE_U8 only if both source images are VX_DF_IMAGE_U8 and the output image is explicitly set to VX_DF_IMAGE_U8. It is otherwise VX_DF_IMAGE_S16.

Functions
vx_node VX_API_CALL	vxAbsDiffNode (vx_graph graph, vx_image in1, vx_image in2, vx_image out)
	[Graph] Creates an AbsDiff node. More...

vx_status VX_API_CALL	vxuAbsDiff (vx_context context, vx_image in1, vx_image in2, vx_image out)
	[Immediate] Computes the absolute difference between two images. More...

Function Documentation

vx_node VX_API_CALL vxAbsDiffNode	(	vx_graph	graph,
		vx_image	in1,
		vx_image	in2,
		vx_image	out
	)

[Graph] Creates an AbsDiff node.

Parameters

[in]	graph	The reference to the graph.
[in]	in1	An input image in `VX_DF_IMAGE_U8` or `VX_DF_IMAGE_S16` format.
[in]	in2	An input image in `VX_DF_IMAGE_U8` or `VX_DF_IMAGE_S16` format.
[out]	out	The output image in `VX_DF_IMAGE_U8` or `VX_DF_IMAGE_S16` format, which must have the same dimensions as the input image.

Return values

vx_node A node reference. Any possible errors preventing a successful creation should be checked using vxGetStatus

vx_status VX_API_CALL vxuAbsDiff	(	vx_context	context,
		vx_image	in1,
		vx_image	in2,
		vx_image	out
	)

[Immediate] Computes the absolute difference between two images.

Parameters

[in]	context	The reference to the overall context.
[in]	in1	An input image in `VX_DF_IMAGE_U8` or `VX_DF_IMAGE_S16` format.
[in]	in2	An input image in `VX_DF_IMAGE_U8` or `VX_DF_IMAGE_S16` format.
[out]	out	The output image in `VX_DF_IMAGE_U8` or `VX_DF_IMAGE_S16` format.

Return values

VX_SUCCESS	Success
*	An error occurred. See `vx_status_e`.