Abramowitz and Stegun - Page index. Alpha: Computational Knowledge Engine. Fourier Transforms. Fourier transform theory. Next: The discrete Fourier transform Up: Computer Vision IT412 Previous: Lecture 4 Subsections So far we have been processing images by looking at the grey level at each point in the image.
These methods are known as spatial methods. However, there are many ways of transforming image data into alternative representations that are more amenable for certain types of analysis. The most common image transform takes spatial data and transforms it into frequency data. Analyse spectrale.