CAJ | 학술논문

多视点视频是由一组摄像机拍摄得到的视频序列。通常情况下，各个摄像机的性能参数很难做到完全一致，从而引起不同视点的视频图像之间产生颜色差异。提出了在多视点视频编码中使用一种新的颜色补偿模式，这种模式能够有效利用相互独立编码的帧间视频的信息，从而减少由多阵列摄像而带来的颜色误匹配。该方法在RGB颜色空间上建立颜色补偿模型，并进一步将颜色补偿模型扩展到YCbCr颜色空间以适用现有视频编码标准。与原始视点间参考图像相比，经过补偿后的视点间参考图像与当前编码图像更为相似，从而提高了MVC的编码效率。此外，颜色补偿模型参数可以分别从编码端和解码端推导得出，不需要将其写入码流。实验结果也表明提出的方法能够提高编码的效率和得到更好的视频质量。
다시점시빈시유일조섭상궤박섭득도적시빈서렬。통상정황하，각개섭상궤적성능삼수흔난주도완전일치，종이인기불동시점적시빈도상지간산생안색차이。제출료재다시점시빈편마중사용일충신적안색보상모식，저충모식능구유효이용상호독립편마적정간시빈적신식，종이감소유다진렬섭상이대래적안색오필배。해방법재RGB안색공간상건립안색보상모형，병진일보장안색보상모형확전도YCbCr안색공간이괄용현유시빈편마표준。여원시시점간삼고도상상비，경과보상후적시점간삼고도상여당전편마도상경위상사，종이제고료MVC적편마효솔。차외，안색보상모형삼수가이분별종편마단화해마단추도득출，불수요장기사입마류。실험결과야표명제출적방법능구제고편마적효솔화득도경호적시빈질량。
Multi-view video is a kind of video sequence taken by a set of cameras. Generally, it is difficult for the performance parameter of each camera to totally agree with each other, which consequently causes color differences among video images of different viewpoints. A new color compensation model is proposed for the Multi-View Video Coding(MVC), which can effi-ciently use information of inter-view of mutual independent coding to reduce the color mismatch caused by multi-arrays of cam-era shooting. This method can establish color compensation model in RGB color space and furthermore can extend it to YCbCr color space to suit for present video code standard. Compared to the previous inter-view reference images, the modified in-ter-view reference pictures are more similar to the present code image which consequently improves the coding efficiency of MVC. Moreover, the color compensation parameter can be derived in both encoder and decoder, therefore no additional data need to be transmitted to the decoder. The experimental results also show that the proposed method improves the coding efficien-cy of MVC and obtains a better video quality.