Detailed Description

Computes the mean pixel value and the standard deviation of the pixels in the input image (which has a dimension width and height).

The mean value is computed as [R00081]:

\[ \mu = \frac{\left(\sum_{y=0}^h \sum_{x=0}^w src(x,y) \right)} {(width * height)} \]

The standard deviation is computed as [R00082]:

\[ \sigma = \sqrt{\frac{\left(\sum_{y=0}^h \sum_{x=0}^w (\mu - src(x,y))^2 \right)} {(width * height)}} \]

Functions
vx_node VX_API_CALL	vxMeanStdDevNode (vx_graph graph, vx_image input, vx_scalar mean, vx_scalar stddev)
	[Graph] Creates a mean value and standard deviation node. More...

Function Documentation

vx_node VX_API_CALL vxMeanStdDevNode	(	vx_graph	graph,
		vx_image	input,
		vx_scalar	mean,
		vx_scalar	stddev
	)

[Graph] Creates a mean value and standard deviation node.

Parameters

[in]	graph	The reference to the graph [R00207].
[in]	input	The input image. `VX_DF_IMAGE_U8` is supported [R00208].
[out]	mean	The `VX_TYPE_FLOAT32` average pixel value [R00209].
[out]	stddev	The `VX_TYPE_FLOAT32` standard deviation of the pixel values [R00210].

Return values

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