Gray Scaling

dithering

)The use of many shades of gray to represent an image. Continuous-tone images, such as black-and-white photographs, use an almost unlimited number of shades of gray. Conventional computer hardware and software, however, can only represent a limited number of shades of gray (typically 16 or 256). Gray-scaling is the process of convertinga continuous-tone image to an image that a computer can manipulate.

While gray scaling is an improvement over monochrome, it requires larger amounts of memory because each dot is represented by from 4 to 8 bits. At a resolution of 300 dpi, you would need more than 8 megabytes to represent a single 8 by 11-inch page using 256 shades of gray. This can be reduced considerably through data compressiontechniques, but gray scaling still requires a great deal of memory.

Many optical scanners are capable of gray scaling, using from 16 to 256 different shades of gray. However, gray scaling is only useful if you have an output devicemonitor or printer — that is capable of displaying all the shades. Most color monitors are capable of gray scaling, but the images are generally not as good as on dedicatedgray-scaling monitors.

Note that gray scaling is different from dithering. Dithering simulates shades of gray by altering the densityand pattern of black and white dots. In gray scaling, each individual dot can have a different shade of gray.

Webopedia Staff
Webopedia Staff
Since 1995, more than 100 tech experts and researchers have kept Webopedia’s definitions, articles, and study guides up to date. For more information on current editorial staff, please visit our About page.

Related Articles

Photo Editing Software

Photo editing software is used to manipulate or enhance digital images. This category of software ranges from basic apps, which are able to apply...

SOHO Business Solutions: Free Email Marketing Services

Just like big businesses, SOHO (small office/home office) owners can leverage email marketing systems to communicate with customers, partners and employees. Just like big businesses,...

Fintech

Fintech, also known as "financial technology," is a term used to describe companies that use innovative technology to create more efficient, transparent, and cost-effective...

Cyber Security

Cyber security is the practice of protecting computer systems, networks, and data by using a variety of different strategies and tools. Many large companies...

ScalaHosting

ScalaHosting is a leading managed hosting provider that offers secure, scalable, and affordable...

HRIS

Human resources information system (HRIS) solutions help businesses manage multiple facets of their...

Best Managed Service Providers...

In today's business world, managed services are more critical than ever. They can...