Accumulate Weighted

Detailed Description

Accumulates a weighted value from an input image to an output image. The accumulation image dimensions should be the same as the dimensions of the input image.

Weighted accumulation is computed by:

\[ accum(x,y) = (1 - \alpha)*accum(x,y) + \alpha*input(x,y) \]

Where \( 0 \le \alpha \le 1 \) Conceptually, the rounding for this is defined as:

\[ output(x,y)= uint8( (1 - \alpha) * float32( int32( output(x,y) ) ) + \alpha * float32( int32( input(x,y) ) ) ) \]

Functions
vx_node VX_API_CALL	vxAccumulateWeightedImageNode (vx_graph graph, vx_image input, vx_scalar alpha, vx_image accum)
	[Graph] Creates a weighted accumulate node. More...
vx_status VX_API_CALL	vxuAccumulateWeightedImage (vx_context context, vx_image input, vx_scalar alpha, vx_image accum)
	[Immediate] Computes a weighted accumulation. More...

Function Documentation

vx_node VX_API_CALL vxAccumulateWeightedImageNode	(	vx_graph	graph,
		vx_image	input,
		vx_scalar	alpha,
		vx_image	accum
	)

[Graph] Creates a weighted accumulate node.

Parameters

[in]	graph	The reference to the graph.
[in]	input	The input VX_DF_IMAGE_U8 image.
[in]	alpha	The input VX_TYPE_FLOAT32 scalar value with a value in the range of \( 0.0 \le \alpha \le 1.0 \).
[in,out]	accum	The VX_DF_IMAGE_U8 accumulation image, which must have the same dimensions as the input image.

Returns

vx_node.

Return values

vx_node

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

vx_status VX_API_CALL vxuAccumulateWeightedImage	(	vx_context	context,
		vx_image	input,
		vx_scalar	alpha,
		vx_image	accum
	)

[Immediate] Computes a weighted accumulation.

Parameters

[in]	context	The reference to the overall context.
[in]	input	The input VX_DF_IMAGE_U8 image.
[in]	alpha	A VX_TYPE_FLOAT32 type, the input value with the range \( 0.0 \le \alpha \le 1.0 \).
[in,out]	accum	The VX_DF_IMAGE_U8 accumulation image.

Returns

A vx_status_e enumeration.

Return values

VX_SUCCESS	Success
*	An error occurred. See vx_status_e.