Subsampled Factor, Passband Frequency Range and Filter Order Used For Design of Oversampled Filter Bank for 2d Image Analysis
Dr.Mrs.S.R. Chougule, Dr.Smt.R.S. Patil · IOSR Journal of VLSI and Signal processing · 2012
This paper proposes an oversampled filter bank, which gives the resultant near perfect reconstruction of input image.An oversampled filter bank structure that can be implemented using popular and efficient fast filter banks to allow subband processing of an input signal with substantially reduced aliasing between subbands.For filters design direct form-II structure FIR filters are used and transformed into two dimensional forms using frequency transformation techniques.Investigation of oversampled filter bank using different oversampled factors and different filter orders for different images are carried out.The analysis of outputs of filter banks images are carried out by using peak signal to noise ratio [PSNR] of compressed images.By using local thresholding segmentation where major components of images are exposed and analysis of filter bank output images are carried out which is helpful to find the difference between images. I.