Enhanced sub-pixel interpolation technique (Needs implementation and tests)

There's a sophisticated and much highly accurate, but traditional, approach for interpolating sub-pixels. Given:

where upper case letters represents the pixels into integer coordinates.

The sub-pixels can be defined by doing a 24-taps fractional DCT interpolation. It's an improvement to one that be done in this paper:

http://web.pkusz.edu.cn/ldm/files/2013/01/6.A-Comparison-of-Fractional-pel-Interpolation-Filters-in-HEVC-and-H.264AVC.pdf

My default sub-pixel precision is 1/64 (1/8 x 1/8). Probably, shall be made using step-by-step.

I'm not worried about processing time.

[Steven Lord]

Thanks for letting us know.

If you want to implement that but are having difficulty doing so, post what you've done so far and ask a SPECIFIC question about where you're having trouble and you may receive some guidance.

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer