Inter-frame difference oversample reconstruction for optical microscanning thermal microscope imaging system

In order to get standard 2×2 microscanning oversample high resolution image, based on Taylor expansion, an algorithm of inter-frame difference oversample reconstruction method is presented. Correction matrix A^-1 is obtained with four nonstandard 2×2 microscanning images Y and standard 2×2 microscanning images X can be acquired according to the equation X=A^-1Y. Then a high spatial resolution oversample image is given with X. Experimental results showed the proposed algorithm is better than the bilinear amplification and direct interpolation. The image spatial resolution and quality is improved with more details. Futhmore the algorithm proposed is simple, fast and has low computational complexity.