CAJ | 학술논문

由于高清电视图像与标清电视图像分辨率上的巨大差异,标清电视图像转为高清电视图像极为困难,像素形状的改变使得传统的图像放大方法很难保证高清电视图像的质量。通过对标清电视图像进行裁剪,利用像素中心点坐标进行双线性插值,保证了像素点的精确位置,消除了像素形状的改变造成的插值误差。考虑到巨大的放大倍数,本文对插值得到的高清电视图像做了后续的锐化处理。实验证明,本文的方法得到的高清电视图像比传统算法得到的高清电视图像在图像质量上有了大大改善。
유우고청전시도상여표청전시도상분변솔상적거대차이,표청전시도상전위고청전시도상겁위곤난,상소형상적개변사득전통적도상방대방법흔난보증고청전시도상적질량。통과대표청전시도상진행재전,이용상소중심점좌표진행쌍선성삽치,보증료상소점적정학위치,소제료상소형상적개변조성적삽치오차。고필도거대적방대배수,본문대삽치득도적고청전시도상주료후속적예화처리。실험증명,본문적방법득도적고청전시도상비전통산법득도적고청전시도상재도상질량상유료대대개선。
It is very hard to transform SDTV images to HDTV images because of the great difference of resolution between them.Moreover,the change in pixel shape from rectangular to square makes the traditional methods of image enlarging impossible to ensure the quality of HDTV images.Based on this reason,we give a new interpolation algorithm： first cut the SDTV image,and then use the center coordinate of pixels to do bilinear interpolation.This method ensures the accuracy of pixel position,erases the interpolation errors which are caused by the change in pixel shape.Considering the huge enlarging multiples,we do sharpen treatment to the HDTV images.The experiment results show that the method can greatly improve the quality of HDTV images comparing with the traditional methods.