why is pca used in photography what is pca of natural light why does pca work in natural imagery how does the fourier transform work? is pca stationary is pca a stationary signal why is pca necessary for natural light why is pca useful for natural images what is pca is pca stationary why do fourier transforms have a linear basis why does a natural fourier transform give a fourier basis how to explain how pca is used in natural images why does pca of a stationary signal need a fourier transform? a. pixel density b. color which is stationary pca of natural image which type of signal is also known as translation invariant? how to use fourier transform for natural images when pca is used, what is the coefficient of variation why is pca necessary why do pca maps have a fourier base