Apparatus and method for storing and transmitting images represe

Details Apparatus and method for storing and transmitting images represe Apparatus and method for storing and transmitting images represe

1987-02-25

1989-05-30

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 19, 358 37, H04N 967

Patent

active

048355992

ABSTRACT:
In order to represent a color image with a reduced quantity of information, during the transformations from color parameter pixel information to luminance/chrominance information, the first of the three luminance/chrominance parameters (i.e., the luminance) is determined for each pixel point. The two remaining luminance/chrominance parameters are determined for a predetermined pixel subarray. The luminance/chrominance subarray parameters are determined by calculating the remaining luminance/chrominance parameters for the pixel array. The remaining luminance/chrominance parameters are then determined for each pixel subarray location by calculating a weighted average of the parameters for the pixel locations that are in the neighborhood of the subarray. Only the averaged luminace/chrominance parameters for the subarray are then stored along with the first luminance/chrominance parameters for all pixels. When the color parameter information is reconstructed, the first luminance/chrominance parameter is used for each pixel and a weighted value of the remaining luminance/chrominance parameters from the neighboring subarray pixel locations are used. A component architecture, suitable for implementing the transformation of the color parameters into luminance/chrominance parameters is described as well a component architecture for reconstructing the color parameters from the reduced luminance/chrominance parameter information.

REFERENCES:
patent: 4531151 (1985-07-01), Hentschke
patent: 4575709 (1986-03-01), Tomlinson

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