27-06-2012, 04:09 PM
Wavelet Video-Processing Technology
Wavelet Video-Processing.docx (Size: 13.76 KB / Downloads: 29)
Wavelet processing allows saving the real-time images in a minimal amount of hard-disk space. Postprocessing of the images for archival purposes even further reduces hard-disk requirements. Offer higher compression ratios and higher resolution than conventional JPEG or MPEG techniques.
Wavelet image compression involves a set of filters that consist of a low-frequency filter and a high-frequency filter that are orthogonal to each other. The purpose of the technique is to discard the least significant coefficients (from a visual-
perception standpoint) of the wavelet-filtered signals. An inverse wavelet transform reconstructs the original signal using the available coefficients. The more coefficients the technique discards, the higher the compression ratio but also the greater degradation of the reconstructed image. However, an intelligent choice of the discarded coefficients
makes the degradation imperceptible to a point and graceful beyond that point.
Wavelet Video-Processing.docx (Size: 13.76 KB / Downloads: 29)
Wavelet processing allows saving the real-time images in a minimal amount of hard-disk space. Postprocessing of the images for archival purposes even further reduces hard-disk requirements. Offer higher compression ratios and higher resolution than conventional JPEG or MPEG techniques.
Wavelet image compression involves a set of filters that consist of a low-frequency filter and a high-frequency filter that are orthogonal to each other. The purpose of the technique is to discard the least significant coefficients (from a visual-
perception standpoint) of the wavelet-filtered signals. An inverse wavelet transform reconstructs the original signal using the available coefficients. The more coefficients the technique discards, the higher the compression ratio but also the greater degradation of the reconstructed image. However, an intelligent choice of the discarded coefficients
makes the degradation imperceptible to a point and graceful beyond that point.