Histogram

Detailed Description

Generates a distribution from an image.

This kernel counts the number of occurrences of each pixel value within the window size of a pre-calculated number of bins. A pixel with intensity 'I' will result in incrementing histogram bin 'i' where [R00066]

\[ i = (I - offset)*numBins/range for I >= offset \]

and

\[ I < offset + range. \]

Pixels with intensities that don't meet these conditions will have no effect on the histogram [R00067]. Here offset, range and numBins are values of histogram attributes (see VX_DISTRIBUTION_OFFSET, VX_DISTRIBUTION_RANGE, VX_DISTRIBUTION_BINS).

Functions
vx_node VX_API_CALL	vxHistogramNode (vx_graph graph, vx_image input, vx_distribution distribution)
	[Graph] Creates a Histogram node. More...

Function Documentation

vxHistogramNode()

vx_node VX_API_CALL vxHistogramNode	(	vx_graph	graph,
		vx_image	input,
		vx_distribution	distribution
	)

[Graph] Creates a Histogram node.

Parameters

[in]	graph	The reference to the graph [R00194].
[in]	input	The input image in VX_DF_IMAGE_U8 [R00195].
[out]	distribution	The output distribution [R00196].

Returns

vx_node [R00197].

Return values

vx_node

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