gray scale


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gray scale

[′grā ‚skāl]
(optics)
A series of achromatic tones having varying proportions of white and black, to give a full range of grays between white and black; a gray scale is usually divided into 10 steps; however, electronic scanners can typically differentiate 16 to 256 levels.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

gray scale

A series of achromatic samples in discrete steps in lightness from white to black.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

gray scale

A series of shades from white to black. The more shades, or levels, the more realistic an image can be recorded and displayed, especially a scanned photo. Scanners differentiate typically from 16 to 256 gray levels, and high-resolution gray scale is widely used for medical x-rays.

At a resolution of 300 dpi, each square inch comprises 90K pixels (300x300). At one byte per pixel (256 levels), a 10x10" image would take up 9MB of storage (90K x 100). See halftone.
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References in periodicals archive ?
Out of a total of 36 patients with benign tumors, 26 (72.22%) patients were correctly diagnosed on gray scale USG alone, while 33 (91.66%) patients were correctly diagnosed when color and spectral Doppler were used along with the gray scale USG.
The gray scale image after blurring is compared with the gray scale distribution in the original gray scale graph, and if the local gray scale distribution is equal, it can be used as the background image.
SGS Softlines is now able to provide an AATCC authorized training program focusing on the best practices using gray scales for visual color assessment.
MY9268 is a 16-channel, 16-bit gray scale pulse width modulation driver with 8-bit Global Current Control.
It is certainly possible that these materials would resolve many of the difficulties mentioned above by allowing access to these images at a larger scale (and perhaps without the gray scale difficulties).
Also on the gray scale, this is a steelier tone, but it, too, has a timeless quality to it.
Each channel has individual 6-bit dot correction current adjustment and 12-bit gray scale PWM dimming.
Such a characteristic of black ink enables rather simple generating gray scale or lightness by color modulation with black halftoning/printing elements ([[??].sub.K] coverage).
It prints a variety of UV curable inks with 360 dpi resolution and eight levels of gray scale at 80 fpm.
Helen Keen of the University of Leeds (England) reached consensus on which ultrasound-detectable abnormalities--synovitis (gray scale and power Doppler) and osteophytes--are important and feasible for inclusion in a scoring system.
Using contour based algorithms, the sensors provide edges that are more stable and reliable than edges found using photometric (gray scale) methods.
First watermark is called Primary Watermark, which is a gray scale digital image.