[Algorithm for restoring spectrogram with sub-pixel resolution].

Insufficient spatial resolution of detectors is an obstacle to capturing spectra with high resolution.An effective solution is sub-pixel restoration,which can restore a high resolution spectrogram from sub-pixel shifted low resolution ones.In the present paper,an algorithm for sub-pixel restoration is suggested.It utilizes the bidirectional recursive relation between sub-pixel values and estimates each sub-pixel value from both directions of head-end and end-head.As a result,the averaged value will be accepted as the sub-pixel value.Numerical experiments on single gauss profile and superposition ones verified the effectiveness of the algorithm.