Histograms

Functions
array	histogram (const array &data, unsigned nbins)
	Histogram of all values in data.
array	histogram (const array &data, unsigned nbins, float min, float max)
	Histogram of all values in data.
array	histequal (const array &data, const array &histogram)
	Data normalization via histogram equalization.

---

Function Documentation

array af::histogram	(	const array &	data,
		unsigned	nbins
	)

Histogram of all values in data.

Parameters:

[in]	data	treated as vector
[in]	nbins	Number of output bins to populate

Returns:

non-normalized histogram of data

Examples:

examples/image/gfor_hist_demo.cpp, and examples/image/image_demo.cpp.

array af::histogram	(	const array &	data,
		unsigned	nbins,
		float	min,
		float	max
	)

Histogram of all values in data.

Parameters:

[in]	data	treated as vector
[in]	nbins	Number of bins to populate between min and max
[in]	min	minimum bin value
[in]	max	maximum bin value

Returns:

non-normalized histogram of data

array af::histequal	(	const array &	data,
		const array &	histogram
	)

Data normalization via histogram equalization.

Parameters:

[in]	data	non-normalized input (assume values [0-255])
[in]	histogram	target histogram to approximate in output (assume 256 bins)

Returns:

data with histogram approximately equal to histogram

Examples:

examples/image/image_demo.cpp.