Method and apparatus for acquiring luminance information and...

Details Method and apparatus for acquiring luminance information and... Method and apparatus for acquiring luminance information and...

2005-04-26

2005-04-26

Jankus, Almis R. (Department: 2671)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

C345S207000, C345S589000, C345S590000, C348S189000, C348S191000, C382S169000, C324S701000

Reexamination Certificate

active

06885369

ABSTRACT:
A method for evaluating the quality of an image, for extracting a luminance gradient displayed on a display device and for evaluating local luminance unevenness caused therein. The method includes the steps of: subdividing the image to be used as an evaluation object into a plurality of pixels; acquiring a first luminance information by calculating the difference between the sum of luminance values of predetermined pixels and the luminance value of a predetermined pixel, the predetermined pixels forming a first pixel group surrounding the predetermined pixel; acquiring a second luminance information by calculating the difference between the sum of luminance values of predetermined pixels and the luminance value of the predetermined pixel, the predetermined pixels constituting a second pixel group; acquiring a third luminance information by adding the first luminance information and the second luminance information; and evaluating the luminance of a screen photographed based on the third luminance information.

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