Image performance characteristics

The subject of the secondary protein structure as a means of defining the performance characteristics ofwheat endosperm-known as hardness-been explored over a seven year period [39, 40]. Another approach, taken by Baron et al., involves the IMS imaging of the endosperm cell walls rather than of the protein found in the endosperm itself [61]. All of these authors performed the imaging in situ, following removal of the protein and starch, in order to study the compositional and architectural heterogeneity and, in relation to this, wheat hardness. In this case, the research was focused on kernel hardness rather than on endosperm hardness, as was the case with our studies. A further study of carbohydrate polymers by the same group involved the investigation of cereal arabinoxylans in relation to their structure and physico-chemical properties. 

The performance characteristics of four optoelectronic image detectors (OIDs) are discussed. The detectors discussed are the silicon intensified target vidicon (SIT), the intensified SIT, the intensified silicon photodiode array detector (ISPD), and the self-scanned photodiode array detector. The main objective of the paper is to provide research workers interested in applying OIDs to a particular application with comparative performance information so that the best detector for a particular application may be selected. 

A general-purpose TM NE A photoemissive device active to 1.1 pm has yet to be developed. Nevertheless, from a comparison of spectral and performance characteristics of opaque NEA and classical photoemitters, it will be seen that NEA devices may soon permit high-gain room-temperature near-infrared imaging with orders of magnitude increase in performance over previous S-1 and modified S-20 characteristics. 

Aramid-reinforced laminate and prepreg allow fast microvia hole formation and at the same time maintain the performance characteristic of a smooth surface for fine-line conductor imaging. The ablation speed of non-woven (aramid) laminates and prepregs is close to that achieved when using nonreinforced materials such as resin-coated foil, dry film, or liquid dielectrics. Since aramid laminates are very stable, they allow the fabrication of doublesided, very thin, etched innerlayers, which are then pressed to a multilayer package in a single... 

This tutorial text will familiarize the reader with the operating principles and practical performance characteristics of commercial infrared (IR) thermal sensing and imaging instruments, and will guide the reader in their selection and application. 

Published performance characteristics of commercially available IR thermal imaging systems can be found in Appendix A. Detailed discussions of diagnostic software and image recording methods can be found in Chapter 4. 

A detailed discussion of performance characteristics and features follows, along with a discussion of typical thermographic display approaches utilized by various imager manufacturers. This is followed by a discussion of currently available thermographic image archiving, processing and report preparation software. 

Salient performance characteristics of a typical imager in this category are ... 

It is an unfortunate fact that many students and indeed design engineers are reluctant to get involved with plastics because they have an image of complicated materials with structures described by complex chemical formulae. In fact it is not necessary to have a detailed knowledge of the strucmre of plastics in order to make good use of them. Perfectly acceptable designs are achieved provided one is familiar with their performance characteristics in relation to the proposed service conditions. An awareness of the structure of plastics can assist in understanding why they exhibit a time-dependent response to an aj lied force, why acrylic is transparent and stiff whereas polyethylene is opaque and flexible, etc., but it is not necessary for one to be an expert... 

Theory and Equipment. Many diseases of the human body can be identified by visual appearance. Tumors in the upper gastrointestinal (GI) tract, for example, possess a characteristic salmon pink color (3). The presence of such a color can be an indication of disease. Endoscopy is the medical imaging tool used to detect such colors in the inside of hoUow internal organs such as the rectum, urethra, urinary bladder, stomach, colon, etc. An endoscope is the instmment used to perform endoscopy. Endoscopic imaging involves the production of a tme color picture of the inside of the human body using lenses and either hoUow pipes, a fiber optic bundle, or a smaU CCD camera. AU three use a large field-of-view, sometimes referred to as a fish eye, lens to aUow a 180° field of view. 

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