发明名称 |
Method and apparatus for acquiring luminance information and for evaluating the quality of a display device image |
摘要 |
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.
|
申请公布号 |
US2002118878(A1) |
申请公布日期 |
2002.08.29 |
申请号 |
US20020076753 |
申请日期 |
2002.02.13 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
TANAHASHI KOHSEI;KOHCHI MASAO |
分类号 |
G01M11/00;G02F1/13;G06T5/00;G06T7/00;(IPC1-7):G06K9/00 |
主分类号 |
G01M11/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|