Abstract：This study proposed a new method using visible and near infrared (Vis/NIR) hyperspectral imaging for the detection and visualization of the chilling storage time for turbot flesh rapid and nondestructively. A total of 160 fish samples with 8 different storage days were collected for hyperspectral image scanning, and mean spectra were extracted from the region of interest (ROI) inside each image. Partial least squares regression (PLSR) was applied as calibration method to correlate the spectral data and storage time for the 120 samples in calibration set. Then the PLSR model was used to predict the storage time for the 40 prediction samples, which achieved accurate results with determination coefficient (R2) of 0.966 2 and root mean square error of prediction (RMSEP) of 0.679 9 d. Finally, the storage time of each pixel in the hyperspectral images for all prediction samples was predicted and displayed in different colors for visualization based on pseudo-color images with the aid of an IDL program. The results indicated that hyperspectral imaging technique combined with chemometrics and image processing allows the determination and visualization of the chilling storage time for fish, displaying fish freshness status and distribution vividly and laying a foundation for the automatic processing of aquatic products.
Key words：Hyperspectral imaging;Turbot;Chilling storage time;Partial least squares regression;IDL;Visualization
朱逢乐，章海亮，邵咏妮，何 勇* . 基于高光谱成像技术的多宝鱼肉冷藏时间的可视化研究 [J]. 光谱学与光谱分析, 2014, 34(07): 1938-1942.
ZHU Feng-le, ZHANG Hai-liang, SHAO Yong-ni, HE Yong* . Visualization of the Chilling Storage Time for Turbot Flesh Based on Hyperspectral Imaging Technique. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(07): 1938-1942.
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