Real-time noise reduction enhancement method for ultraviolet Raman spectrum system

Abstract

The invention discloses a real-time noise reduction enhancement method for an ultraviolet Raman spectrum system, and belongs to the field of spectrum detection and spectrum processing technologies andsignal processing. The method comprises: collecting ultraviolet Raman signals in real time, counting the collected Raman signal data, predicting the effective peak value of the Raman signals, and theeffective peak value comprising an effective valley and a top peak; processing each frame of collected Raman spectrum; aiming at each frame of Raman spectrum, segmenting each frame of Raman spectruminto blocks through the obtained effective troughs, respectively judging the attributes of the segmented blocks, the attributes of the regions refering to the attributes of noise regions or the attributes of effective Raman signal regions, filtering the noise regions, and then splicing the Raman signal regions and the filtered noise regions; and then, splicing the processed N + 1 frames of spectrums along a time axis to form a 2D image, filtering the 2D image through an iterative bilateral filtering method, and superposing and normalizing the N + 1 spectrums along the time axis after filteringto obtain a Raman spectrum subjected to noise reduction processing.

Description

technical field The invention relates to a noise reduction and enhancement method for an ultraviolet Raman spectroscopy system, in particular to a method for reducing spectral random noise of a real-time ultraviolet Raman signal, increasing the signal-to-noise ratio and thereby enhancing the Raman peak signal, belonging to spectral detection and spectroscopy Processing technology and the field of signal processing. Background technique Raman spectroscopy is a non-destructive spectroscopic detection method based on inelastic light scattering (i.e., changes in the energy / frequency of the incident laser light) from laser-matter interactions. By measuring the specific Raman spectrum (Raman fingerprint) of the molecular system to be tested, the sample can be quickly, simply, and repeatably non-contact non-destructive testing and quantitative analysis, with short time required, small amount of sample, and accurate measurement results Features. However, the sensitivity of Raman s...

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Problems solved by technology

The technical problem to be solved by the real-time noise reduction and enhancement method of the ultraviolet Raman spectroscopy system disclosed by the present invention is: reduce the random noise of the real-time Raman spectroscopy, enhance the Raman characteristic peak, and realize the Raman spectroscopy detection system with low Raman signal-to-noise ratio Optimization of acquired real-time spectra

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