Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Image compression with color interpolation for a single sensor image system










Image Number 6 for United States Patent #5172227.

In accordance with the present invention, the R,G,B color image signals from a single sensor having a color filter array are all transformed to .GAMMA.-space by changing them to R.sup.1/.GAMMA., G.sup.1/.GAMMA., B.sup.1/.GAMMA., respectively, where .GAMMA. is approximately 2.4. In this space, all operations such as color differencing, interpolation of those missing pixels required for color differencing, compression, decompression, edge enhancement and final interpolation of all missing pixels are performed without further transformation of the image signals. For the same final bit rate, noise in the reproduced image is reduced by refraining from interpolating the missing color pixels prior to compression of the image data. In order to avoid over-emphasizing features of the image which are already sufficiently sharp, the combined outputs of horizontal and vertical sharpening processes are subjected to a paring process of the invention which suppresses strong high-spatial frequency components as a function of their amplitude. In the compression-decompression process of the invention, each spatial frequency coefficient of the spatial frequency-transformed image is divided by a normalization factor determined by cascading in the spatial frequency domain the human visual system contrast sensitivity function, the edge enhancement modulation transfer function and the image display modulation transfer function and inversing the resulting matrix elements.








 
 
  Recently Added Patents
Synthesis of 8-amino boron dipyrromethenes having blue fluorescence
Emergency whistle, flashlight, and compass
Writing implement
Wall flow type exhaust gas purification filter
Solar cell using polymer-dispersed liquid crystals
Cover panel for frame based door lock
Agent for expelling parasites in humans, animals or birds
  Randomly Featured Patents
Cover device of a storage battery
Battery powered means and method for facilitating measurements while coring
Protractor
Method for joining a film onto a substrate
Banded ECP sensor
Adjustable door frame
Speech synthesizing method and apparatus
Gas mixer and manifold assembly for ALD reactor
Image forming apparatus service system
Circuit and method for measuring current in a circuit