Digital encoder for facsimile transmission
作者： Helmuth O. Sautter , Wallace E. Sherbon , Soo Young Chai
DOI:
关键词: Computer vision 、 Computer science 、 Gray level 、 Image (mathematics) 、 Background data 、 Encoding (memory) 、 Binary signal 、 Facsimile transmission 、 Computer graphics (images) 、 Encoder 、 Block (data storage) 、 Artificial intelligence
摘要: A scheme for digitally encoding continuous-tone information from an original pictorial image reducing the amount of which must be transmitted includes processing electrical scanning signals via separate networks (20, 30) to generate (a) high-resolution detail data "black" and "white" pels, (b) low resolution gray-scale or background approximating grayness two-dimensional blocks (104) pels (102). In network (30), are first compared (31) different position dependent threshold values a binary signal (108) black white represents gray-scale. Then, any (102) determined in (20) subtracted (36) modified (110) The number each block is counted (42), count gray level particular Subtracting generates lighter area found. Each further compressed encoded represent information.
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