Analysis on FFT and DWT Transformations in Image Processing

摘要

An Image processing is a coming out research which needs heed in bio-medical field. There are many image processing methods which are useful to bring out information for analysis, memory space and conserves computing time. Transformation is one of image processing techniques. Some of the transformation techniques are wavelet transform, Hilbert transform, Radon Transform, Fourier transform etc. Transformation techniques are chosen based on their applications, advantages and disadvantages. The wavelet transformation be a technique which equates time domain and frequency domain. It is exactly as popular as the time-frequency representation of a non -stationary signal. Where Fourier transform breaks down the image into real and imaginary components, which is nothing but representation of image in frequency domain. In this paper, discrete wavelet transform using Haar and fast Fourier transform are applied on images using MATLAB 2018a.