# Sinc Interpolation implementation in Matlab for reconstructing or interpolating?

I am working on my project and I need to have a Sinc Interpolation function for a real world image. But, it seems that I have not caught the concept of Sinc interpolation. Could some one help me with this issue? this function is for adding some value among samples or it is used for reconstructing? How can I use this function for reconstructing signal.

• the $\operatorname{sinc}(\cdot)$ function is the impulse response to an ideal, theoretical, brick-wall LPF which is used in the Nyquist/Shannon/Whitaker Sampling and Reconstruction Theorem to reconstruct the bandlimited continuous-time waveform from the samples. so the interpolation concept is the same as the reconstruction concept and then sampling the continuous-time reconstructed at different times than the original samples. – robert bristow-johnson Mar 13 '15 at 18:13