发明名称 |
Vignetting compensation |
摘要 |
A method used for the compensation of vignetting in digital cameras has been achieved. The compensation for vignetting is done in two steps. The first step is done during production of the camera unit and involves taking and analyzing an image of a test screen, preferably a gray test screen. This results in a set of e.g. 5×5 coefficients describing a polynomial surface. The second step is done for each image that is taken by the camera and involves calculating and applying a gain-table based on polynomial coefficients to all pixels of the image to compensate vignetting.
|
申请公布号 |
US7692700(B2) |
申请公布日期 |
2010.04.06 |
申请号 |
US20030379863 |
申请日期 |
2003.03.04 |
申请人 |
DIGITAL IMAGING SYSTEMS GMBH |
发明人 |
JOHANNESSON ANDERS;LARSSON INGEMAR |
分类号 |
G06T3/00;H04N9/64;H04N5/20;H04N5/217;H04N5/225;H04N5/243;H04N5/357 |
主分类号 |
G06T3/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|