Image signal compression method and system

Details Image signal compression method and system Image signal compression method and system

2007-09-04

2007-09-04

Couso, Jose L. (Department: 2621)

Image analysis

Image compression or coding

C382S238000, C348S390100

Reexamination Certificate

active

10112265

ABSTRACT:
An image signal compression method and system. Without involving the current processing pixel, an encryption key and a decryption key are respectively and separately generated by a compression subsystem and a decompression subsystem. Both of the encryption and decryption keys are separately generated using the same principle of pixel prediction. Both of the encryption and decryption keys have the same value. In the compression subsystem, the encryption key is subtracted from the pixel value of the current processing pixel to generate a compressed data. In the decompression subsystem, the decryption key is added to the compressed data to recover the pixel value of the current processing pixel.

REFERENCES:
patent: 4562467 (1985-12-01), Bradley
patent: 4785356 (1988-11-01), Gonzales et al.
patent: 5751860 (1998-05-01), Su et al.
patent: 5923783 (1999-07-01), Kawauchi et al.
patent: 6100933 (2000-08-01), Coelho

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