In order to preserve the texture and edge information and to improve the space resolution of single frame

a novel super resolution reconstruction was proposed by using Nonsubsampled Contourlet transformation and interpolation method based on edge direction.The image is transformed into the high-pass sub-band and low-pass sub-band by NSCT.The threshold is set in the high-pass sub-band

the high-pass sub-band coefficients is enhanced and de-noised

and low-frequency components are replaced by the enhanced amplitude of the original image.A high-resolution image is achieved by inverse NSCT.The experimental results indicate that

compared with traditional super resolution reconstruction algorithms

this algorithm can get smooth edges and recovery the texture features

and resist Gaussian noise.