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Digital electronic still camera

  • US 5,295,077 A
  • Filed: 01/23/1992
  • Issued: 03/15/1994
  • Est. Priority Date: 01/23/1991
  • Status: Expired due to Term
First Claim
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1. A digital electronic still camera, comprising:

  • image pickup means for picking up an image of a field to be photographed;

    block-dividing means for dividing the image into a plurality of blocks which are respectively made up of a plurality of pixels;

    transforming means for executing an adaptive discrete cosine transformation of each block of the image to generate a corresponding block of image data;

    quantizing means for quantizing the image data of each block with reference to a quantization table selected as an optimum one from a plurality of quantization tables having different quantization step sizes;

    image attributable judging means for judging an image attribute based on a spectrum distribution of the image data selected as membership functions of fuzzy decision;

    quantization table setting means for selecting a quantization table as the optimum one based on the image attribute obtained;

    coding means for coding the image data quantized; and

    recording means for recording the coded image data into a memory.

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