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There has been considerable interest recently in the transmission of newspapers by high-resolution digital facsimile. Newspapers contain two types of materials: texts and halftone pictures. For text materials it has been found1 that at low resolutions (around 100 points per inch) the digital (binary) picture has a poorer quality than an analog picture of(More)
A. COMPUTER SYNTHESIZED TWO EXPERIMENTS HOLOGRAMS-In a previous report, we derived a new method for recording a complex function in the form of a real non-negative function. The new method has advantages over the conventional holographic method because it does not require a reference signal or a biasing constant in recording the complex wave front of an(More)
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