Interpolation Algorithm of Transforming Standard-definition TV Images to High-definition TV Images
Shihong Wu · Journal of Hubei University of Education · 2011
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.