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Graphics Interchange Format  |  2000-06-28  |  82.9 KB  |  352x291  |  8-bit (256 colors)
   ocr: 10 20 SU 40 100 200 300 LOw-FrequencySgnal gn-Frequency Signal LOw-Frequencylmage ignerrequenzy Image Figure 1: A collection of signals and images, showing only low-frequency or only high-frequency components. (top left) Low-Frequency Signal, (top right) High-Frequency Signal, (bottom left) Low-Frequency Image, (bottom right) High-Frequency Image.