A Novel Video Scaling Algorithm Based On Linear Interpolation WithQuality Enhancement

A non-adaptive image interpolation algorithm is proposed to scale images for any given scaling factor with an enhancement scheme to ensure a better picture. |In the proposed algorithm, two reference frames, one with higher resolution and another with lower resolution are generated using an original videoframefor the User defined scaling factor. Later, two Intermediate frames are generated from these reference frames using the filtering based re-sampling Lanczos3 kernel. Finally, the desired scaled frame is obtained by linearly interpolating the two intermediate frames.The scaled frame is then passed through an enhancement phase, where a Sharpening Filter is employed, to obtain an enhanced scaled frame. The algorithm compares favorably with other interpolating techniques such as Bilinear Interpolation and B-Spline interpolation in terms of the image quality. The quality of the scaled frames expressed as PSNR is better than 45dB. Keywords-Image scaling, Video scaling, Filtering, Sampling, Interpolation