Image processing method and apparatus

Details Image processing method and apparatus Image processing method and apparatus

1997-02-20

1999-03-30

Evans, Arthur G.

Image analysis

Histogram processing

For setting a threshold

382299, 345127, B41J 1500

Patent

active

058899278

ABSTRACT:
An image processing method and apparatus which can obtain an image, at a desired resolution, far from degradation in image at a high speed is disclosed. Input original image data is converted into hierarchical codes by a JBIG-CODEC 95, and the codes of the layers are stored in a memory. To obtain image information at a desired resolution, a code necessary for representing an image having, of the resolutions which can be represented by the hierarchical codes stored in the memory, a resolution hither than and closest to the desired resolution is selected to execute decoding processing in the JBIG-CODEC 95, thereby obtaining reproduced image data. A resolution conversion unit 96 converts the resolution of the reproduced image into a desired resolution by using, e.g., linear interpolation and outputs the converted image data.

REFERENCES:
patent: 5153936 (1992-10-01), Morris et al.
patent: 5751857 (1998-05-01), Kobayashi

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