| 摘要 |
To correct the gray levels or pixel intensities of images provided by a digital infrared camera having a two-dimensional array of detector elements with non-sensitive areas therebetween, correction coefficients respectively allocated to the detector elements are stored in a memory of an image processing system. The gray levels of image pixels are corrected by the respective corresponding correction coefficients. The correction coefficients are progressively updated and improved by means of a dynamic correction process. To distinguish stationary features in a scene being viewed from non-uniformities among the detector elements so that such stationary features do not influence the updating of the correction coefficients, the image of the scene incident on the detector is moved relative to the detector, by means of a microscanner deflecting the image beam incident, on the detector. The image is preferably moved to respective positions spaced apart from each other by one half of the physical spacing between adjacent detector elements, and the sequence of movement is selected to minimize the time-spacing between respective image data to be read-out.
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