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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
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
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