HistogramExtensions Class Reference

extends the long[] class by methods that help analyze a histogram. More...

Static Public Member Functions
static int[]	FindPeaks (this IList< int > histogram, int blurSize, int minDiff)
	Find peaks in the histogram identified by the supplied criteria. More...
static int[]	FindPeaks (this IList< long > histogram, int blurSize, int minDiff)
	Find peaks in the histogram identified by the supplied criteria. More...
static double[]	Filter (this IList< int > histogram, double[] kernel)
	Filter a histogram array with the given kernel . At the beginning and end of the histogram, the histogram uses constant extension More...
static double[]	Filter (this IList< long > histogram, double[] kernel)
	Filter a histogram array with the given kernel . At the beginning and end of the histogram, the histogram uses constant extension More...
static double[]	Filter (this IList< double > histogram, double[] kernel)
	Filter a histogram array with the given kernel . At the beginning and end of the histogram, the histogram uses constant extension More...
static int	SumBetween (this IList< int > histogram, int lowerLimit, int upperLimit)
	Count the number of pixels that lie between two limits in the histogram. More...
static long	SumBetween (this IList< long > histogram, int lowerLimit, int upperLimit)
	Count the number of pixels that lie between two limits in the histogram. More...

Detailed Description

extends the long[] class by methods that help analyze a histogram.

Member Function Documentation

Filter() [1/3]

static double[] Filter ( this IList< double >  histogram, double[]  kernel  )

static

Filter a histogram array with the given kernel . At the beginning and end of the histogram, the histogram uses constant extension

Parameters

histogram	Histogram to be filtered.
kernel	Kernel to be used

Returns

Filter result.

Filter() [2/3]

static double[] Filter ( this IList< int >  histogram, double[]  kernel  )

static

Filter a histogram array with the given kernel . At the beginning and end of the histogram, the histogram uses constant extension

Parameters

histogram	Histogram to be filtered.
kernel	Kernel to be used

Returns

Filter result.

Filter() [3/3]

static double[] Filter ( this IList< long >  histogram, double[]  kernel  )

static

Filter a histogram array with the given kernel . At the beginning and end of the histogram, the histogram uses constant extension

Parameters

histogram	Histogram to be filtered.
kernel	Kernel to be used

Returns

Filter result.

FindPeaks() [1/2]

static int[] FindPeaks ( this IList< int >  histogram, int  blurSize, int  minDiff  )

static

Find peaks in the histogram identified by the supplied criteria.

Parameters

histogram	Histogram to analyze.
blurSize	Averaging window size (must be >= 1).
minDiff	Minimum grey value difference between two peaks.

Returns

Peak positions in the histogram.

Exceptions

ArgumentNullException	If histogram is null.
ArgumentOutOfRangeException	If blurSize or minDiff are out of rang.e

FindPeaks() [2/2]

static int[] FindPeaks ( this IList< long >  histogram, int  blurSize, int  minDiff  )

static

Find peaks in the histogram identified by the supplied criteria.

Parameters

histogram	Histogram to analyze.
blurSize	Averaging window size (must be >= 1).
minDiff	Minimum grey value difference between two peaks.

Returns

Peak positions in the histogram.

Exceptions

ArgumentNullException	If histogram is null.
ArgumentOutOfRangeException	If blurSize or minDiff are out of rang.e

SumBetween() [1/2]

static int SumBetween ( this IList< int >  histogram, int  lowerLimit, int  upperLimit  )

static

Count the number of pixels that lie between two limits in the histogram.

Parameters

histogram	The histogram to calculate the sum on.
lowerLimit	Lower limit to count from.
upperLimit	Upper limit to count to (including).

Returns

Number of pixels with a gray value between lowerLimit and upperLimit .

Exceptions

ArgumentOutOfRangeException

If lowerLimit is smaller than zero or upperLimit is larger or equal to the number of entries in the Histogram.

SumBetween() [2/2]

static long SumBetween ( this IList< long >  histogram, int  lowerLimit, int  upperLimit  )

static

Count the number of pixels that lie between two limits in the histogram.

Parameters

histogram	The histogram to calculate the sum on.
lowerLimit	Lower limit to count from.
upperLimit	Upper limit to count to (including).

Returns

Number of pixels with a gray value between lowerLimit and upperLimit .

Exceptions

ArgumentOutOfRangeException

If lowerLimit is smaller than zero or upperLimit is larger or equal to the number of entries in the Histogram.