Understanding and Applying Machine Vision, Second Edition, Revised and Expanded (Manufacturing Engineering and Materials Processing)

Understanding and Applying Machine Vision, Second Edition, Revised and Expanded (Manufacturing Engineering and Materials Processing)

Language: English

Pages: 416

ISBN: 0824789296

Format: PDF / Kindle (mobi) / ePub

A discussion of applications of machine vision technology in the semiconductor, electronic, automotive, wood, food, pharmaceutical, printing, and container industries. It describes systems that enable projects to move forward swiftly and efficiently, and focuses on the nuances of the engineering and system integration of machine vision technology.

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Page 30 Figure 3.6  Pharma Vision system from Focus Automation inspecting a roll  of pharmaceutical labels on a rewinder for print defects. 3.5—  Machine Vision Industry­Related Definitions The following are definitions associated with the different segments of the machine vision industry: Merchant machine vision vendor ­ A company that either offers a general­purpose, configurable machine vision system or a turnkey application­specific machine.

Use in machine vision applications. Alternatively, it may adapt a personal computer to a machine vision application. MVSW can be sold to GPMV builders, ASMV,  builders, merchant system integrators, OEMs, or end­users. Web scanner supplier ­ A company providing a turnkey system to inspect unpatterned products produced in webs (paper, steel, plastic, textile, etc.). These systems.

Human viewing. In machine vision applications these circuits may distort the linearity of the sensor, defeating a linear gray scale relationship that may be the basis of a  decision. Disabling gamma correction can increase the contrast between the dark image and the bright image. The resolution performance of a camera is influenced by the operating mode. Of fundamental importance is adequate illumination for a high signal­to­noise ratio. The.

Resolution. Regrettably, the term resolution reflects concepts that have evolved from different industries for different types of detectors and by researchers from  different disciplines. The TV industry adopted the concept of TV lines; the solid­state imaging community adopted pixels as equivalent to photosites; and the  photographic industry established the concept of line pairs, or cycles per millimeter:.

Processing such as Fourier transforms, spatial filtering is typically performed as follows: on a pixel­by­pixel basis, an output image is generated based on a pixel's  brightness relative to its immediate neighboring pixels. Where a neighborhood's pixel brightness makes rapid transitions from light to dark or vice versa, the image may  be said to contain high frequency components. A neighborhood of slowly varying pixel brightness represents low­frequency components.

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