CAJ | 학술논문

鉴于CCD相机在强光照射时会产生光晕,CCD敏感面像素之间互相影响,进而导致成像模糊不清,提出一种克服光晕现象的像质增强算法.利用HTPS(高温聚硅)液晶具有可实时控制各像素光透过率的特性,使液晶和主CCD由光纤光锥进行像素一对一耦合.用Cyclone II芯片作为图像处理单元,测光CCD采集图像信息,控制液晶改善图像质量.实验结果表明,该系统能够精确控制HTPS液晶上每个像素的透过率,使CCD相机能在强光下正常成像,其灰度分辨能力提高了1倍,从而提高了图像的清晰度.
감우CCD상궤재강광조사시회산생광훈,CCD민감면상소지간호상영향,진이도치성상모호불청,제출일충극복광훈현상적상질증강산법.이용HTPS(고온취규)액정구유가실시공제각상소광투과솔적특성,사액정화주CCD유광섬광추진행상소일대일우합.용Cyclone II심편작위도상처리단원,측광CCD채집도상신식,공제액정개선도상질량.실험결과표명,해계통능구정학공제HTPS액정상매개상소적투과솔,사CCD상궤능재강광하정상성상,기회도분변능력제고료1배,종이제고료도상적청석도.
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.