home *** CD-ROM | disk | FTP | other *** search
/ Developer Source 4 / developer source - volume 4.iso / dobbs / apr94 / codyf101.gif next >
Graphics Interchange Format  |  1996-01-18  |  25KB  |  677x1098  |  1-bit (2 colors)
Labels: text | diagram | screenshot | line | black and white | font
OCR: (a) T 0.0 .0.1 02 .0.4 .05 Normalized Frequency (b) Input Signal Level 3 Approximation Level 2 Approximation Level 1 Approximation Level 0 Approximation Figure 1: (a) The Discrete Wavelet Transform (1)WT) divides the spectrum of the sampled data into octave bands; (b) the resolution at each level of the DWT is half that of the level above it and twice that of the level below. At lower levels, time resolution is sacrificed for frequency localization.