Mumbai University > Electronics > Sem 7 > Digital image processing

Marks: 5M

Year: May 2011

Fourier analysis is basically representation of a signal by a set of orthogonal sinusoidal waveforms. The coefficients of this representation are called frequency components and the waveforms are ordered by frequency. The computational simplicity of the Walsh function is due to the fact that Walsh transform are real and they have values either +1 or -1.Walsh codes are created out of Hadamard matrices and Transform. Hadamard is the matrix type from which Walsh created these codes. Walsh codes have just one outstanding quality i.e. in the family of Walsh codes all are orthogonal to each other and are used to create channelization within the 1.25 MHz band frequency.