Hardware algorithm based on liquid crystal partial gating image system

Since the CCD camera produces the halo while highlight is shining on it, the pixels on the CCD sensitive plane interacts on each other, and then the image blur follows next, an image improvement algorithm for overcoming the phenomenon of the halo is proposed. With the characteristic that the HTPS liquid crystal could perform the real-time control of the light transmissibility of each pixels, the pixels on the liquid crystal and main CCD are coupled one by one by optical fiber tapers. The image information gathered by a photometric CCD is processed by Cyclone II (core of the image processing unit). The liquid crystal is controlled by Cyclone II for improving the image quality. The PAL signal is gathered by the video capture chip. The Y channel gray scale information can be adjusted by the empirical formula and the output signal is transformed to VGA format. The experiment indicates that this system can precisely control the light transmissibility of each pixel on HTPS liquid crystal, entrusts the CCD camera with the ability to image normally under the highlight, and increases the resolution of the camera by a factor of two.