Hyperspectral Imaging for Food Quality Analysis and Control by Da-Wen Sun

By Da-Wen Sun

In response to the mixing of desktop imaginative and prescient and spectrscopy options, hyperspectral imaging is a unique expertise for acquiring either spatial and spectral details on a product. Used for almost twenty years within the aerospace and army industries, extra lately hyperspectral imaging has emerged and matured into essentially the most robust and swiftly growing to be tools of non-destructive nutrients caliber research and keep an eye on. Hyperspectral Imaging for foodstuff caliber research and regulate presents the center information regarding how this confirmed technological know-how may be essentially utilized for nutrition caliber evaluate, together with info at the apparatus to be had and choice of the main applicable of these tools. also, real-world food-industry-based examples are integrated, giving the reader very important insights into the particular program of the technological know-how in comparing meals items. *Presentation of rules and tools offers middle realizing of the way this technology plays, in addition to guide on determining the main applicable gear for implementation *Includes real-world, functional program to illustrate the viability and demanding situations of operating with this know-how *Provides worthy details for making right decision on use of hyperspectral imaging

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To make this sophistication much clearer, it can be considered that the spatial and spectral resolution in most widely used hyperspectral imaging systems implemented in food quality assessment are of 512 Â 320 pixels. If under certain applications a unity binning factor (b1 ¼ 1) is required in the spatial direction, this will result in line-scan images with a spatial resolution of 512 pixels (512 divided by 1). On the other hand, if a binning factor of value b2 ¼ 2 is used the resulting spectral resolution would be 160 pixels (320 divided by 2) in the spectral axis.

E. a lens or mirror. 6 Working principle of prism-grating-prism (PGP) spectrograph (courtesy of Specim Ltd). com/companions/ 9780123747532/) in the direction of the spectral axis, marked with different sizes of A00 . The focused radiation is detected by a 2D detector array such as charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) detector. The imaging spectrograph allows a 2D detector array to sample one spatial dimension of length 6x and infinite width 6y and the spectral dimension of the 3D cube simultaneously.

Therefore, an object imaged on the slit will be recorded as a function of its entire spectrum and its location in the sample. In this design an array of detectors is used to scan over a two dimensional scene using a two dimensional detector perpendicular to the surface of the specimen. This configuration is normally used when either the specimen or the imaging unit is moving one in respect to the other, such as those used in industrial applications. The sensor detectors in a pushbroom scanner are lined up in a row called a linear array.

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