Re:An Intuitive Explanation of Fourier Theory
by ambiversive on Wednesday September 19, 2007 @11:14PM
(#57209)
The DC term also known as ao, Co, and Do (in the trigonometric, compact, and exponential forms) is the average value of the signal over its period (if it is periodic). It is the integral of the signal over one period divided by the period.
It provides NO information about the varying levels, it tells you something like the sum of all the pixels / number of pixels. If you have a 10x10 uniform image, all pixels=1, the DC term will by 1/100.
Again, the DC Term is the absoloute lowest spatial frequency, hence it's DC.