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Description

The Histogram tool calculates the histogram for the given image. Typically for black and white image, black is defined by 0 and white is defined by 255. The histogram is analysed to give information about the image in question.

Note for 32bit images the histogram rang is from 0 to maximum intensity +1

Histogram

Smoothing
The averaging applied to the histogram. This smoothes out the histogram and makes the peaks smoother.

Units
Only applies to the Parameters (Not the plot) which can be in greylevel or as a percentage of max

Arg
For Min and Max this is a percentage form the limit

NOTE the plot uses a Limit% and not the Arg as on the parameters property page In window the color is BGR
in linux RGB

Histogram Results

Histogram Results.

Number Selector
For a color image the results are shown for each color.  1 is blue, 2 is green, 3 is red.

Mean
The average intensity

Mode
The most common, i.e. dominant single intensity

Mass Mode
Unlike the mode, the Mass mode takes into account the total peak volume. This intensity, therefore, represents the peak eneryy and the mass mode index represents the overall most dominant intensity.

Median
The central intensity of the population

Sample Size
the number of sample
NOTE if smoothing is done this make the samplecount for each plane in a color image change and so no longer the same

Auto Threshold
The suggested threshold to make the image either black or white

Minimum
The minimum pixel intensity

Maximum
The maximum pixel intensity

Variance
The variance of the image. The variance is the Standard Deviation squared

Standard Deviation
The Standard deviation of the pixel analyzed.

Dark Peak
The intensity of the dark peak

Light Peak
The intensity of the light peak

Contrast
The contrast between the dark peak and the light peak

Inputs

CIFViewer

CIF

ROI

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