发明名称 |
Method and apparatus for determining and correcting for illumination variations in a digital projector |
摘要 |
The need is met according to the present invention by providing a method of correcting pixel by pixel variations in a display, the method including the steps of creating a defect map of pixel intensity offsets for the display; correcting an input signal according to the defect map; and displaying the corrected input signal on the display, wherein the offset defect map is created by modulating a pixel in the display at a predetermined rate at a predetermined intensity; sensing the display with a photosensor to generate a sensed signal; demodulating the signal with a synchronous demodulator at the predetermined rate to produce a demodulated signal representing a sensed intensity; and employing the sensed intensity and the predetermined intensity to generate a correction offset.
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申请公布号 |
US2003076419(A1) |
申请公布日期 |
2003.04.24 |
申请号 |
US20010032974 |
申请日期 |
2001.10.22 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
ORFITELLI WILLIAM A.;MARKIS WILLIAM R. |
分类号 |
H04N5/21;H04N5/74;(IPC1-7):H04N17/02 |
主分类号 |
H04N5/21 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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