b) Histogram Specification
Histogram Specification is also known as Histogram Matching.
c) Scanning Electron Microscope
SEM stands for Scanning Electron Microscope.
It is called Global Histogram Processing.
Only in dark images, we notice that the components of histogram are concentrated on the low side on intensity scale.
Local Histogram Processing is used.
a) Image enhancement
It is mainly used for Enhancement of usually dark images.
Histogram is the basis for numerous spatial domain processing techniques.
d) Probability Density Function
PDF stands for Probability Density Function.
Utilising non-overlapping regions usually produces "Blocky" effect.
c) Histogram linearisation
Histogram Linearisation is also known as Histogram Equalisation.