Get Computer vision technology in the food and beverage PDF

By D-W Sun

Using desktop imaginative and prescient structures to regulate production techniques and product caliber has develop into more and more very important in foodstuff processing.  This publication experiences snapshot acquisition and processing applied sciences and their functions particularly sectors of the nutrients undefined. half one presents an creation to computing device imaginative and prescient within the nutrition and beverage industries, discussing computing device imaginative and prescient and infrared recommendations for photograph acquisition, hyperspectral and multispectral imaging, tomographic options and photograph processing. half considers machine imaginative and prescient applied sciences for automated sorting, international physique detection and removing, automatic slicing and picture research of foodstuff microstructure, whereas the belief specializes in the present and destiny purposes of machine imaginative and prescient in particular parts of the foodstuff and beverage industries, reminiscent of qc of meats, grain caliber review and the assessment and keep watch over of fruit, vegetable and nut caliber.

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Their main disadvantages are lower sensitivity and longer response time. However, these problems are almost solved with the advent of surface micro-machining technology. Most uncooled detectors are based on pyroelectric materials or microbolometer technology. Pyroelectricity is the ability of some materials to generate an electrical potential when they are heated or cooled. It was first discovered in minerals such as quartz, tourmaline and other ionic crystals. The first generation of uncooled thermal cameras looks very similar to the conventional cathode ray tube, except for the face plate and target material.

This IR transparent face plate IR lens Signal Pyroelectric x electrode plate deflection Mesh y Focusing deflection plate Anode Modulator Electron beam Cathode Video signal Amplifier Fig. 12 Schematic diagram of the first-generation pyroelectric tube. Published by Woodhead Publishing Limited, 2012 Computer vision and IR techniques for image acquisition 23 type of camera offers high detectivity but produces image at relatively low speed (typically 1 Hz). Furthermore, absolute temperature measurement often requires individual calibration of each element, which significantly slows down the image acquisition time.

Illumination sources Halogen lights are the most common broadband illumination source. Light is generated through incandescent emission when high temperature is applied on the tungsten filament that is housed in a quartz glass envelope filled with halogen gas. Quartz tungsten halogen (QTH) lamps generate a smooth spectrum in the wavelength range from visible to infrared. The QTH lamps can be used to directly illuminate the target or be placed in a lamp housing, where light is delivered via an optical fiber.

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