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Topic: Color space encoding

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In the News (Mon 22 Apr 19)

  Color space - Wikipedia, the free encyclopedia
These spaces, such as Pantone, are in effect a given set of names or numbers which are defined by the existence of a corresponding set of physical color swatches.
CIE 1931 XYZ color space is the first attempt to produce a color space based on measurements of human color perception and it is the basis for almost all other color spaces.
It corresponds closely to the YUV scheme used in PAL television except that the YIQ color space is rotated 33° with respect to the YUV color space.
en.wikipedia.org /wiki/Color_space_encoding   (1224 words)

 A Standard Default Color Space for the Internet - sRGB
For color to be reproduced in a predictable manner across different devices and materials, it has to be described in a way that is independent of the specific behavior of the mechanisms and materials used to produce it.
Color management is a term that describes a technology that translates the colors of an object (images, graphics or text) from their current color space to the color space of the output devices like monitors, printers,...
Since the image is in a known color space and the profile for that color space would ship with the OS and browser, this enables the end users to enjoy the benefits of color management without the overhead of larger files.
www.w3.org /Graphics/Color/sRGB.html   (6019 words)

 Color space -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-22)
A color model is an abstract mathematical model describing the way (A visual attribute of things that results from the light they emit or transmit or reflect) colors can be represented as (Click link for more info and facts about tuple) tuples of numbers, typically as three or four values or color components (e.g.
When formally defining a color space, the usual reference standard is the (Click link for more info and facts about CIE) CIE (Click link for more info and facts about Lab color space) Lab color space, which was specifically designed to encompass all colors the average human can see.
These spaces, such as (Click link for more info and facts about Pantone) Pantone, are in effect a given set of names or numbers which are defined by the existence of a corresponding set of physical color swatches.
www.absoluteastronomy.com /encyclopedia/c/co/color_space.htm   (1458 words)

 CSS3 module: Color
The format of an HSLA color value in the functional notation is 'hsla(' followed by the hue in degrees, saturation and lightness as a percentage, and an , followed by ')'.
The two color swatches on the left illustrate setting the background color of a table cell in two ways: The first column uses the named color value, and the second column uses the numeric color value, which should be the same.
User agents may default the 'flavor' color to the dominant accent color used on the physical machine/mechanism that the user is interacting with (frequently a mouse, keyboard, monitor and computer case, often just a laptop), if the UA is able to retrieve that information from the platform and machine.
www.w3.org /TR/2002/WD-css3-color-20020219   (3230 words)

In the case of the sRGB color space, we have a six-sided polyhedron, often referred to as the “RGB color cube,” which is misleading since the sides are only equal in the encoding (0-255 thrice), and not very equal perceptually.
Second, a color space is a two-dimensional boundary on the volume defined by this vector, usually determined by the minimum and maximum value of each primary, which is called the color gamut.
In the case of a quantized color space, it is preferable for reasons of perceptual uniformity to establish a non-linear relationship between color values and intensity or luminance.
www.anyhere.com /gward/hdrenc/hdr_encodings.html   (6879 words)

 colorspace-faq -- FAQ about Color and Gamma   (Site not responding. Last check: 2007-10-22)
Color is the perceptual result of light in the visible region of the spectrum, having wavelengths in the region of 400 nm to 700 nm, incident upon the retina.
The colors that can be mixed from a particular set of CMY primaries cannot be determined from the colors of the primaries themselves, but are also a function of the colors of the sets of combinations of the primaries.
A direct color image can be converted to indexed color with an image-dependent colormap by a process of color quantization that searches through all of the triples used in the image, and chooses the palette for the image based on the colors that are in some sense most "important".
www.faqs.org /faqs/graphics/colorspace-faq   (12951 words)

 Color Space Animations
This area is shown because we wish to indicate what portions of the visible gamut may be represented in these color spaces, though we cannot show them in their true colors due to limitations of conventional image formats and displays.
The degree of color gamut contraction is a function of luminance and the encoding.
This color space has better saturation at the top end than its RGB counterparts, but it also has the odd behavior we mentioned where the brightest representable values are not white.
www.anyhere.com /gward/hdrenc/colorspaces.html   (707 words)

 Color space encoding   (Site not responding. Last check: 2007-10-22)
A Color space encoding is a technique used to represent colors of a particular color space in a format that can be understood by digital computers.
The problem of encoding colors into a format that digital computers recognize is limited by the binary number system; each bit can encode two distinct values, or colors.
The average human is said to be able to distinguish between several million different colors, depending upon the individual's perceptive capability, and upon environmental conditions, so the 24-bit color space encoding is generally considered sufficient to represent all of the colors that humans are able to distinguish.
www.eurofreehost.com /co/Color_space_encoding.html   (357 words)

 ipedia.com: Color space Article   (Site not responding. Last check: 2007-10-22)
A color space in the most generic sense is identical to the concept of gamut.
In general use however, a color space is the gamut which can be described by the combination between a given color model and a certain mapping of its colors onto the Lab color space (e.g.
These spaces, such as Pantone, are in effect a given set of colors which are described by the existence of a corresponding set of physical color swatches by which the colors are identified.
www.ipedia.com /color_space.html   (981 words)

 ColorSpace   (Site not responding. Last check: 2007-10-22)
Similarly, the intensity of a spectral color may alter its perception considerably; for example, a low-intensity orange-yellow is brown, and a low-intensity yellow-green is olive-green.
Color is something that is so integral to our lives and the world around us yet it is very difficult to come to a conclusive answer to this question.
The colors in the brain are arranged in a somewhat circular manner which was first discovered by Munzel a french painter.
colorspace.typepad.com   (1474 words)

 Xlib Programming Manual: Color Structures
Because the color specification can be encoded for the various color spaces, encoding for the spec member is identified by the format member, which is of type XcmsColorFormat.
Formats for device-independent color spaces are distinguishable from those for device-dependent spaces by the 32nd bit.
In contrast, RGB Device values generated as a result of converting color specifications are always gamma corrected, and RGB Device values acquired as a result of querying a colormap or passed in by the client are assumed by Xlib to be gamma corrected.
tronche.com /gui/x/xlib/color/structures.html   (529 words)

 Spectral Spaces and Color Spaces   (Site not responding. Last check: 2007-10-22)
It has been long known that color experiences under controlled conditions may be ordered into a color space based on three primary attributes.
In this work, we compare color spaces, preceptual or based on dimensionality reduction using color matching functions and additional operations (uniform color spaces) to spectral spaces derived with a variety of dimensionality reduction techniques.
Thus, spectral spaces offer more discrimination of spctra than color spaces, however in a way that is not in agrement with human color vision.
www.ece.ncsu.edu /imaging/Projects/SpectralSpaces   (256 words)

 Welcome to CADENCE   (Site not responding. Last check: 2007-10-22)
It is the standard color space for the Web (in both the HTML and CSS specifications) and is also the standard for many image formats, including PNG, SVG, VRML, and JPEG/EXIF.
With other color spaces, operations that involve contrast, alpha blending, and other adjustments can destroy color information, which is readily apparent to the average viewer.
Since sRGB is the official Web color space, and the one I reviewed with the widest adoption, you should consider setting your workstation to use it.
cadence.advanstar.com /newsletter/sheerin/1202_1.html   (1185 words)

 NASA - JPL Solar System Simulator
The Jupiter, Saturn, Uranus and Neptune flyby movies which SPACE developed were greeted with great excitement, shown on NOVA programs and major TV networks, and fostered much enthusiasm for the space program around the world.
To create a mission simulation, SPACE used a spacecraft model, scientific instrument characteristics, and a conic elements file that described spacecraft and celestial body states.
Color rendering used dithering, simple antialiasing, careful color space encoding and a high order depth priority algorithm.
space.jpl.nasa.gov /faq.html   (1867 words)

 Color Constancy
This is a color space (model) where distances between points in this space are equivalent to the amount of change in the percieved color.
The second type, known as a pseudo-color image, a shade of color is assigned to a specific intensity level or to a range of intensity values.
A technique, known as intensity slicing, assigns a shade of color to all grey levels that fall under a specified value and a different shade of color to those grey levels that exceed the specified value.
www.mcs.csuhayward.edu /~grewe/CS6825/Mat/Color/color3.htm   (798 words)

 Adobe RGB (1998) color image encoding
Effective color management requires that a color profile be attached to every image or graphic to indicate the "native" color conditions — also known as the color space — under which the file was created.
Adobe applications introduced the idea of a "working" color space, one that is not necessarily tied to a specific device but that represents the ideal conditions for image reproduction.
The Adobe RGB (1998) profile has been widely adopted as a working space because it provides a relatively large and balanced color gamut that can be easily repurposed for reproduction on a variety of devices.
www.adobe.com /adobergb   (307 words)

 AMIO - Test Charts   (Site not responding. Last check: 2007-10-22)
Full size color bars are 75%: white is at 235, fl at 16, colors at 180 each.
100% color bars are provided on the bottom right: white is at 235, fl at 16, colors at 235 each.
Some intelligence was used to layout the color patches in a way as to not disturb each other too much on a waveform monitor, but the task was apparently rather difficult.
www.amio.ca /site/article_TestCharts.html   (715 words)

These include the use of dithering, simple antialiasing, careful color space encoding and most importantly the use of a high order depth priority algorithm for solving the hidden surface problem.
The spacecraft camera boom was also encoded in a way to make it articulated in the same manner as the real spacecraft.
When a color frame was produced, a master program examined the positions of all the visible objects, wrote out command files for the appropriate rendering programs and invoked them in the correct order.
research.microsoft.com /users/blinn/FLYBY.HTM   (1668 words)

 Zvon - RFC 2301 [File Format for Internet Fax] - Base Color Fax Mode
This encoding differs in two ways from the other L*a*b* encodings used in TIFF [TIFF, TTN1]: it specifies a different default range for the a* and b* components, based on a comprehensive evaluation of existing hardcopy output, and it optionally allows selectable range for the L*, a* and b* components.
With this encoding, the minimum sample value is mapped to 0 and the maximum sample value is mapped to (2^n - 1), i.e.
T.42 specifies the ITULAB encoding in terms of a range and offset for each component, which are related to the minimum and maximum values as follows: minimum = - (range x offset) / 2^n - 1 maximum = minimum + range The Decode field default values depend on the color space.
www.zvon.org /tmRFC/RFC2301/Output/chapter6.html   (1133 words)

 A Chaotic Waterwheel   (Site not responding. Last check: 2007-10-22)
Also visualizing trajectories in phase space (section 2 and 3) using proper ways of color-encoding is useful.
The 3-dimensional visualization in phase space can give more detailed information that can not be provided by the 2-dimensional diagram as for instance visualizing a limit cycle (see section 3 for r=24.1).
On the other hand visualizing for instance 500 trajectories for r=6.0 (see section 3) in 3-D phase space would not give anything else than a dense mesh of curves.
www.cg.tuwien.ac.at /studentwork/VisSem97/Lorenz97/conclusion.html   (156 words)

 Color Management Functions   (Site not responding. Last check: 2007-10-22)
ous color spaces, encoding for the spec member is identified
space added at run time may be different each time the pro-
for the various color spaces are defined as follows:
moonbase.wwc.edu /~davija/XLIB/06-01.html   (364 words)

 Streaming Media Careers
The encoding engineer will have a varied knowledge of digital video encoding processes from capture to compression; will understand hi-definition formats and encoding processes, have a knowledge of digital and standard television video formats; and have a discriminating eye for video quality and compression artifacts.
The encoding engineer will work with two other engineers in a secure video facility within an office environment.
The team is responsible for generating high-quality encoding of a vast number of movie assets per week.
www.streamingmedia.com /industryjobs/job_detail.asp?job_id=3562   (413 words)

 Movie-List Forums - Video encoding position with Buena Vista/Disney Burbank
The Encoding QC Engineer position is located in Burbank, California and resides within the Buena Vista Datacasting business unit; part of The Walt Disney Company.
Reporting to the Manager, Video Operations and Production, this position will be primarily responsible for the daily operational encoding of digital media content for Buena Vista Datacasting and the pre-QC of all incoming movie audio/video physical tape assets.
Other Encoding Engineer responsibilities include editing, noise reduction and scaling of film/video sources, databasing of metadata, writing and carrying out video quality plans, scripting command-line applications, tracking order status, providing progress reports, coordinating content delivery with IT personnel, notifying lab manager of technical issues, and reprocessing content when quality fails.
www.movie-list.com /forum/printthread.php?t=9361   (391 words)

 HD Testchart
The computergenerated file is encoded in 8bit RGB space and available as a TIFF file.
The chart can then be examined by eye, on the waveform monitor and be exported back to an RGB file to be compared in an image processing program.
Some intelligence was used to layout the color patches in a way that the do not disturb each other too much on a waveform monitor, but the task was rather difficult.
www.belle-nuit.com /testchart.html   (915 words)

 JPEG Lossy (DCT) Compression Encoding
Compression encoding generally used for full color and grayscale continuous-tone pictorial images; does not work well with bitonal or palette-color images.
The encoding process is described in the specification and on a number of web sites, including http://www.faqs.org/faqs/compression-faq/part2/ (Subject [75] on this lengthy page).
JPEG images transform RGB color space to YCrCb (luminance-chrominance) color space before compression, and then transform back to RGB for display.
www.digitalpreservation.gov /formats/fdd/fdd000017.shtml   (811 words)

 Color Management Functions   (Site not responding. Last check: 2007-10-22)
Xlib provides a mechanism for using string names for colors.
Color strings are used in the following functions:
A numerical color specification consists of a color space
moonbase.wwc.edu /~davija/XLIB/06-02.html   (152 words)

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