Arbaaz Singh, Indian Institute of Technology, India

A suitable interpolation method is essential to keep the noise level minimum along with the time-delay. In recent years, many different interpolation filters have been developed for instance H.264-6 tap filter, and AVS- 4 tap filter. This work demonstrates the effects of a four-tap low-pass tap filter (Grid-adaptive filter) on a hole-filled depth image. This paper provides (i) a general form of uniform interpolations for both integer and sub-pixel locations in terms of the sampling interval and filter length, and (ii) compares the effect of different finite impulse response filters on a depth-image. Furthermore, the author proposed and investigated an integrated Grid-adaptive filter, that implement hole-filling and interpolation concurrently, causes reduction in time-delay noticeably along with high PSNR.

Depth Images, Hole filling, Interpolation, Interpolation filter