Open AccessTHE ELIMINATION OF BRIGHT CONTINUOUS SPECTRAL BACKGROUND IN SPECTROGRAM BY MEANS OF COHERENT OPTICAL PROCESSING
Author(s) -
Guoguang Mu,
Kang Hui,
Zhengming Li
Publication year - 1980
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.29.794
Subject(s) - spectrogram , optics , continuous spectrum , fourier transform , physics , filter (signal processing) , point (geometry) , optical filter , computer science , speech recognition , mathematics , computer vision , geometry , quantum mechanics
From the point of view of the optical information processing, we consider the spectrogram in which the spectral lines are immersed in the bright continuous background as a low contrast optical picture. By means of the coherent optical processing system and a special high-pass filter, the Fourier spectrum of the continuous background can be reduced and then the final result may appear as a spactrogram without continuous background. This may be considered as a new method for enhancement of the ratio S/N of a spectrogram.