<Li> Digital radio reception without a superheterodyne circuit, as in a modern cell phone or radio scanner; </Li> <Li> Image processing to remove periodic or anisotropic artifacts such as jaggies from interlaced video, strip artifacts from strip aerial photography, or wave patterns from radio frequency interference in a digital camera; </Li> <Li> Cross correlation of similar images for co-alignment; </Li> <Li> X-ray crystallography to reconstruct a crystal structure from its diffraction pattern; </Li>

Explain the role of fourier transform in signal processing