【摘要】 文章讨论了在DCT域中进行红外视频图像预处理的可能性,并提出了一种基于DCT域的压缩视频预处理算法。该算法通过DCT域低通滤波、系数变换和对比度拉伸实现了红外图像的增强处理。仿真结果表明,提出的算法克服了对视频压缩、解压再处理的弊端,提高了系统的整体性能和响应速度,改善了视频图像的视觉效果。更多还原

【Abstract】 The probability of preprocessing IR video image and compressing video synchronously were discussed. Then an IR image preprocessing algorithm for compressed video in the Discrete Cosine Transform (DCT) domain was presented. In this algorithm, compressed IR image was enhanced by low-pass filtering, coefficient transform and contrast stretching in DCT domain. Simulation result shows that the algorithm throws off the time-consuming process of compressing-decompressing-processing, upgrades the performance and responding speed and improves the visual effect of video.更多还原