Download e-book for iPad: Computer Vision Technology for Food Quality Evaluation, by Da-Wen Sun

By Da-Wen Sun

ISBN-10: 0128022329

ISBN-13: 9780128022320

Computer imaginative and prescient expertise for nutrients caliber assessment, moment Edition remains to be a useful source to engineers, researchers, and technologists in examine and improvement, in addition to a whole connection with scholars attracted to this speedily increasing box. This new version highlights the latest advancements in imaging processing and research thoughts and technique, captures state-of-the-art advancements in desktop imaginative and prescient know-how, and pinpoints destiny tendencies in learn and improvement for meals caliber and defense evaluate and regulate. it's a certain reference that gives a deep realizing of the problems of knowledge acquisition and snapshot research and gives thoughts to unravel difficulties and extra increase effective equipment for foodstuff caliber assessment.

  • Thoroughly explains what machine imaginative and prescient know-how is, what it might do, and the way to use it for meals caliber evaluation
  • Includes a wide selection of laptop imaginative and prescient concepts and purposes to guage a wide selection of foods
  • Describes the professionals and cons of alternative recommendations for caliber evaluation

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Additional info for Computer Vision Technology for Food Quality Evaluation, Second Edition

Example text

8 highlights this difference schematically. As can be seen in Fig. 8A, an area-scan camera provides a fixed resolution, permitting a simplified installation where an object is completely stationary. In contrast, a line-scan camera delivers not only high, but technically unlimited, resolution since it can capture an image of fixed width but infinite length. Therefore line scan is suitable for imaging an object which moves continuously. Examples of line-scan applications are shown in Fig. 8B-i and B-ii.

11C shows the attenuated transmitted energy as observed by probe B. Both graphs show that information relating to the amplitude of both the transmitted and reflected pulses can be measured, and this can also be used for imaging. As shown in Fig. 11 the signals are usually rectified and filtered to present a simple 1-D picture, and the time base can be delayed to allow for a couplant gap. To provide a full 2-D image, the ultrasonic probe must be scanned over the surface of the sample. In doing so, the Tx/Rx probe is connected via mechanical linkages to position transducers, which measure its x and y coordinates and its orientation.

With the exception of stereovision, most passive 3-D techniques are monocular systems, in that they require a view from one direction only. Therefore the passive system requires the precise calibration in the illuminator and camera for a range of gray levels in the inspected object. In contrast, active imaging uses an additional energy or light, which is projected onto the object’s surface. By viewing the light from different angles, a 3-D range image can be reconstructed using a range of methods like the triangulation, the moire´ interferometry, the holographic interferometry, and the Fresnel diffraction.

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Computer Vision Technology for Food Quality Evaluation, Second Edition by Da-Wen Sun


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