dithering

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A technique used in computer graphics to create the illusion of varying shades of gray or additional colors by distributing the screen pixels or imagesetter dots of an image Dithering relies on the eye's tendency to blur spots of different colors by averaging their effects and merging them into a single perceived shade or color
Dithering is the approximation of a colour by the visual mixing of adjacent pixels of a similar colour used in producing acceptable images based on a limited colour range Pixels are automatically arranged in such a way as to fool the human eye Without dithering techniques many bitmap images would look harsh with jagged edges when the available colour palette is restricted to 256 colours or less
A technique for mixing two or more colours together in a dot pattern to create the illusion of additional colours
present participle of dither
a display technique that is used in ERDAS IMAGINE to allow a smaller set of colors appear to be a larger set of colors
Dithering is a method of simulating full-colour images on a 256-colour computer display Pixels from the 256-colour palette are combined into patterns that approximate other colours The human eye merges these patterns into a single combined colour when viewed at a distance Dithering can increase the size of GIF images as it increases the likelihood of increasing the horizontal variation in such images The use of the 216 colour Netscape palette (the non-dithering, browser default palette) avoids dithering If necessary, this palette can be translated into either an adaptive or optimized palette for further colour reduction
To approximate a color from a mixture of other colors when the required color is not available For example, pink can be approximated by placing red pixels adjacent to white pixels
Dithering is a common technique to improve digitizing when quantization noise (see also Quantization Error/Noise) can no longer be treated as random This happens when an analog input signal remains at the same value for many consecutive samples, causing the digitized output to look "stuck" at a certain digital output code even when the input is changing by less than ±0 5LSB The quantization noise now looks more like a threshold or a distortion rather than additive random noise To get around this effect, a small amount of random noise is added to the analog input signal This added noise causes the digital output to randomly toggle between two adjacent codes, thereby avoiding the previously described thresholding effect
A technique for alternating the values of adjacent dots or pixels to create the effect of intermediate values In printing color images or displaying color on a computer screen, dithering refers to the technique of making different colors of adjacent dots or pixels give the illusion of a third color; for example, a printed field of alternating cyan and yellow dots appears to be green Dithering can give the effect of shades of gray on a black-and-white display or the effect of more colors on a color display
A technique that is used to add more colors or shades of gray to an existing image, the goal being to improve the appearance of the image Can be thought of as the inverse to quantization
A technique for creating an image with apparent levels of gray by grouping black and white dots into cells According to the number of black and white dots and their arrangement in the cell, the eye perceives the cell as a single gray, not as a group of black and white dots Commonly used by laser printers to simulate grey images The NDLP use of diffuse dithering represents a special case in which the scanner's dot pattern is randomized
One of many processes for reducing the total number of colors present in an image while retaining visual fidelity Dithering can be done by interleaving pixels of selected colors to locally approximate the desired color Dithering can be applied to either a color or a greyscale color space and may be necessary due to a limited number of colors available on the display device
When a color that is not browser safe is displayed, two browser safe colors are mixed (or alternated) to create the desired color This is called dithering
A process which gives the illusion of varying shades of gray or shades of color
{i} mixing of colors, blending of pixels of different colors in order to create an area of intermediate color (Computers)
Dithering occurs when a Web browser attempts to display colors that are not in its native color palette, by placing close together pixels in colors that the computer can display The results are generally unattractive, as seen below
A method of displaying colours that are not available on a printer/monitor etc The illusions of created by mixing available colours
A process by which computers approximate the display of colors in an image that are not available given the particular system configuration Dithering is achieved by varying the patterns of dots that make up the image Dithering slows down the display of graphics, so using colors that are available on as many systems as possible improves the performance of web pages that include graphics E
(n ) The process of simulating unavailable colors in a displayed graphic by using a pattern of two or more available colors
When working with a computer display system that supports 8-bit color (or less), the video card can display only 256 different colors at one time Dithering is a technique to simulate the display of colors that are not in the current color palette of a particular image It accomplishes this by arranging adjacent pixels of different colors into a pattern which simulates colors that are not available to the computer
the alternating dots of two or more colors, typically to blend between colors or to create a new color not found in the color table From a distance a dithered color will appear to be a single color Older 8bit monitors also use dithering to display colors that are not present in the system palette Use the web safe (or 216 color table) to avoid having this adversely affect your images
Process simulating shades of gray or color variations by varying sizes and shapes of pixel groupings instead of an ordered array of halftone dots Process reduces the contrast between dots of different colors/shades and creates a more flowing, natural look
Error diffusion, or dithering, is a way of avoiding aliasing due to a cut-down palette size If a colour cannot be matched exactly then the nearest colour is used and the difference remembered Then on the next pixel the difference is added to the desired colour and the result matched to the nearest colour available In this way a mid-blue, for example, might be represented by a scattering of dark blue and light blue, if that mid-blue were not available in the current palette
Dithering is a process in which differently colored adjacent pixels are used to simulate colors and shades that do not actually exist in an images color palette
Dithering is a useful feature when performing color reductions This function diffuses adjacent pixels to represent colors, which are not actually in the image, resulting in a closer representation of the original color balance Less Dithering level cause smaller image file size The recommendation is to reduce Dithering level to the value where the image quality is acceptable
the process of representing intermediate colors by patterns of tiny colored dots that simulate the desired color
If you have a computer with a display system that supports 8-bit colour, the video card can display only 256 different colours at one time Dithering is a technique used to stimulate the display of colours that are not in the current colour palette of a particular image It accomplishes this by arranging adjacent pixels of different colours into a pattern which stimulates colours that are not available to that computer
When working with a computer display system that supports 8-bit color (or fewer colors), the video card can display only 256 different colors at one time Dithering is a technique to simulate the display of colors that are not in the current color palette of a particular image It accomplishes this by arranging adjacent pixels of different colors into a pattern which simulates colors that are not available to the computer
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To render an approximation of (an image, etc.) by using dot patterns in similar colours to those that are unavailable on the system
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In digital recording and signal processing, dithering is a mathematical process where a random noise is added to the least significant bit of a digital word With very low level signals, the quantization error becomes correlated to the signal level This creates a measurable amount of distortion By adding dither, the correlation between the signal level and the quantization error is canceled, allowing the digital system to encode amplitudes smaller than the least significant bit If you change the word size as a signal passes from one digital system to another, being able to add dither allows you to maintain a high quality signal
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act nervously; be undecided; be uncertain
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Low-level noise added to the signal to reduce the effect of quantization error
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{i} state of confusion, extreme agitation or excitement; vacillation, hesitation
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Dithering is a mathematical process where a random noise is added to the least significant bit of a digital word With very low level signals, the quantization error becomes correlated to the signal level This creates a measurable amount of distortion By adding dither, the correlation between the signal level and the quantization error is canceled, allowing the digital system to encode amplitudes smaller than the least significant bit If you change the word size as a signal passes from one digital system to another, being able to add dither allows you to maintain a high quality signal
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Dither is a process through which exta bits in the digital audio stream are removed Usually, it happens when there is a 20 or 24 bit converter going into a 16 bit device (like an SBM into a dat deck) Obviously, the extra bits have to go away, and there are different ways of doing it Many devices merely throw away the least significant bits, while others, such as Sony's Super Bit-Mapping, actually does sound analysis and shaping to produce the best possible dithering result
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To convert an digitised image containing continuous tones, including colour, into one consisting of two colours only, usually black and white This is necessary for the image to be printed It is also possible to dither a coloured image into the four process colours: cyan, magenta, yellow and black, suitable for a colour printer
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To approximate a color that is not part of the current palette by combining pixels of different colors close to each other Viewed from a distance, it gives the effect of the desired color, but viewed closely, the dots are visible Dithering can be avoided by selecting non-dithering colors that are compatible with different browsers
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a process of changing the color value of a pixel to the closest matching color value in the palette; placing image pixels closer together to create the illusion of more colors than an image actually uses
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Since a majority of graphics displays are still 8-bit (and can only display 256 colors simultaneously), special techniques are needed to display images with many more colors present Dithering simulates additional colors by juxtaposing two different colors to imply a new one An extreme example of dithering is the display of early Macintoshes, which approximated levels of grays by clusters of small black and white dots
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To do something nervously
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A slight up and down vibratory motion of the machine tool ram and attached electrode used to improve cutting stability
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The mixing of adjacent pixels to simulate additional colors when available colors are limited, such as on an 8-bit monitor The positioning of different colored pixels within an image that uses a 256 color palette to simulate a color that does not exist in the palette A dithered image often looks noisy, or composed of scattered pixels
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The process of approximating pixel colours when reducing the colour depth of an image Dithering can improve transitions between colours when reducing a 24-bit image to 8-bit format
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To be uncertain or unable to make a decision about doing something
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make a fuss; be agitated act nervously; be undecided; be uncertain
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To simulate a color that is not part of the current palette on-screen (or in print) by combining pixels of different colors close to each other Viewed from a distance, it gives the effect of the color Viewed closely, the dots are visible Dithering can give a noisy appearance to a picture on-screen, but it often can be avoided by selecting non-dithering colors that are compatible with different browsers and platforms See RGB and Creating Small, Fast-Loading Graphics for Web Pages for more help with this DitheredcolorMagnified8 times
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To approximate a color that is not part of the current pallette by combining pixels of different colors close to each other Viewed from a distance, it gives the effect of the desired color, but viewed closely, the dots are visible Dithering can be avoided by selecting non-dithering colors that are compatible with different browsers
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dithers an image to a color map
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When someone dithers, they hesitate because they are unable to make a quick decision about something. We're still dithering over whether to marry If you have been dithering about buying shares, now could be the time to do it. to keep being unable to make a final decision about something dither over/about/between (didder (14-19 centuries))
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A process that deliberately adds a tiny amount of noise to a signal in order to mask unwanted sounds introduced when the signal's original bit depth is reduced Dithering is recommended when transferring audio to a device that uses a lower bit depth
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Applied to sampling this technique is used to work out the best fit of a sound when you change the resolution of a sample i e "I recorded this at 20bit/96Khz and then dithered down to CD quality 16bit/44 1Khz " Back
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make a fuss; be agitated
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The process of adding low-level random noise to audio signals in order to reduce quantization noise in A/D converters Dither is also applied during digital audio wordlength reduction (e g , 20 to 16 bit conversion)
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The mixing of adjacent pixels to simulate additional colors when available colors are limited, such as on an 8-bit monitor or an 8-bit palette
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When a color cannot be shown directly, you can dither the color to fool the eye into seeing that color by using dots of other colors The human eye blends the dots into a single color, when the dots are small
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The process of patterning dots of color in an image to achieve the effect of more colors than the current bit-depth permits
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{f} hesitate; tremble; be excited or agitated
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an excited state of agitation; "he was in a dither"; "there was a terrible flap about the theft"
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To fill the gap between two pixels with another pixel having an average value of the two to minimize the difference or add detail to smooth the result
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To create a gray-scale image by using fixed patterns of black and white pixels to represent each shade of gray Every time the image needs a particular shade of gray, the software uses the same pattern
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the mixing of adjacent pixels to simulate additional colors when available colors are limited, such as on an 8-bit monitor
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Literally, dither is noise added intentionally to a digital recording Low level signals are difficult for digital gear to record; the sampling machine simply has difficulty deciding whether the necessary bits should be turned on or off, creating "quantization noise " By adding a small amount of very controlled noise to the original signal, the bits can be made to positively switch on or off, improving low level sound resolution The noise used is often "shaped" to be in-offensive to human ears Good dithering algorithms, whether hardware or software based, can make an incredible difference in the sound quality of a digital recording!
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[dI dhEr]
dithering