Where 2-D DFT is necessary in image processing applications instead of 2-D DCT? As we know the 2-D DCT is a real-valued kernel and less computational complexity and it used in several image processing applications like image compression etc. 2-D DFT is a complex kernel and high computational complexity, So in which image processing application of 2-D DFT is more advantageous than 2-D DCT?
Why DFT is instead of DCT in image processing applications?
Any suggestions would be greatly appreciated!
Thanks
Sukumar.
Any place you would like to filter an image with anti symmetric filter.