In Histogram Matching r and z are gray level of input and output image and p stands for PDF, then, what does pz(z) stands for?

Specific probability density function

Specified pixel distribution function

Specific pixel density function

Specified probability density function

In Histogram Matching r and z are gray level of input and output imag

1.	In Histogram Matching r and z are gray level of input and output image and p stands for PDF, then, what does pz(z) stands for?
A.	Specific probability density function
B.	Specified pixel distribution function
C.	Specific pixel density function
D.	Specified probability density function
Answer» E.