| 光谱学与光谱分析 |
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| Algorithm for Restoring Spectrogram with Sub-Pixel Resolution |
| YANG Huai-dong, CHEN Ke-xin, HE Qing-sheng, JIN Guo-fan |
| State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, China |
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Abstract 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.
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Received: 2008-08-10
Accepted: 2008-11-12
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Corresponding Authors:
YANG Huai-dong
E-mail: yanghd@tsinghua.edu.cn
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