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Chroma key - Wikipedia, the free encyclopedia A chroma key is the removal of a color (or small color range) from one image to reveal another image "behind" it. When the phase of the chroma signal corresponds to the preprogrammed state or states associated with the background color(s) behind the principal subject, the signal from the alternate background is inserted in the composite signal and presented at the output. When the phase of the chroma signal deviates from that associated with the background color(s) behind the principal subject, video associated with the principal subject is presented at the output. en.wikipedia.org /wiki/Chroma_key   (508 words)

Munsell color system - Wikipedia, the free encyclopedia "Chroma" was measured out from the center of the wheel, with lower chroma being less saturated (washed out, such as pastels). For instance light yellow colors have considerably more potential chroma than light purples, due to the nature of the eye and the physics of color stimuli. This led to a wide range of possible chroma levels, and a chroma of 10 may or may not be maximal depending on the hue and value. en.wikipedia.org /wiki/Munsell_color_system   (490 words)

mir DMG: Chroma Subsampling Chroma is sampled at half the horizontal frequency as luma, but the vertical frequency is the same. Chroma is sampled at half the horizontal frequency as luma, and also at half the vertical frequency. Chroma subsampling modes are defined by a pair of ratios and a pair of offsets. www.mir.com /DMG/chroma.html   (600 words)

Chroma subsampling - Wikipedia, the free encyclopedia In digital image processing, chroma subsampling is the use of lower resolution for the color (chroma) information in an image than for the brightness (intensity or luma) information. Because the human eye is less sensitive to color than intensity, the chroma components of an image need not be as well defined as the luma component, so many video systems sample the color difference channels at a lower definition (i.e., sample frequency) than the brightness. The three terms of the ratio are: the number of brightness ("luminance" "luma" or Y) samples, followed by the number of samples of the two color ("chroma") components: U/Cb then V/Cr, for each complete sample area. en.wikipedia.org /wiki/YUV_4:2:2   (780 words)

High Quality Chroma Key   (Site not responding. Last check: 2007-10-29) Additionally, a high quality chroma key algorithm is intended to serve as an example of a fairly complex real-world algorithm which would be interesting to implement using Intel MMX or other multimedia enhanced architecture. The fundamental problem for a chroma key function is, first, to decide which pixels in the foreground image belong to the blue backing and which - to needed foreground objects and, second, how to identify and process boundary pixels. As a second part of the project, it was planed to re-implement the chroma key algorithm on MMX architecture as an example of a fairly complex real-world application. www.cs.utah.edu /~michael/chroma   (1924 words)

CHROMA - Chroma & Art Education   (Site not responding. Last check: 2007-10-29) Chroma is committed to the support of the visual arts, art education and art educators internationally. Chroma aims to establish a community of art educators across the world by publishing valuable and significant information about current trends and issues in contemporary art education. Chroma will also give art educators a global forum in which to discuss issues and ideas and will provide them with the opportunity for publishing programs and articles online. www.chromaonline.com /art_education/art_education.htm   (326 words)

Chroma Chem Pty Ltd   (Site not responding. Last check: 2007-10-29) Chroma Chem.’s vision is to be a leader in the development of consumer safety products for the food and beverage and consumer health industries by further development of existing patents and future assistance to developing technology. Chroma Chem is targeting the wine and beverage bottling market in first instance and then plans to sell to the food and pharmaceutical packaging industry. Chroma Chem has arranged to outsource part of the manufacturing process for its tamper evident indicator for the Australian market and, under negotiations with the USA. www.chroma-chem.com /mission_and_strategy.html   (183 words)

The Chroma The Chroma had 16 VCO's (usable either as 16 individual, or 8 pairs), 2 filters (each capable of highpass/lowpass) that could be put in series or parallel, and could do FM and (I think) ring modulation. Chroma was pre-MIDI, but it could be interfaced with an Apple II to provide 8-voice multitimbral operation and (I think) sequencing. Each comes close to the Chroma in terms of "fat" but (hangs head in shame) I've never had the chance to play with a Matrix 12 (although I saw a guy in a band playing an Xpander once). www.ibiblio.org /emusic-l/rms/chroma.html   (832 words)

DVD Player Benchmark - Chroma Upsampling Error When the interlaced algorithm is applied to progressive images, chroma samples that were supposed to be used for scan lines 1 and 2 are instead interpolated to scan lines 1 and 3, and the chroma samples for scan lines 3 and 4 instead are affecting 2 and 4. In the simplest case, where the chroma lines are just copied to the adjacent image lines, the end result is that scan line 2 gets the chroma information that should have gone to scan line 3, and vise-versa, all the way down the screen. The chroma information from field 1 leaks into field 2 and vice versa on every pair of fields, and the result is a bizarre pre- and post-echo in the chroma channel. www.hometheaterhifi.com /volume_8_2/dvd-benchmark-special-report-chroma-bug-4-2001.html   (6028 words)

Chroma Home   (Site not responding. Last check: 2007-10-29) The Chroma Group (Chroma) is a software company that develops complex analytical applications for life and earth sciences, using advanced technology for pattern recognition and complex systems simulation. Chroma is funded by Draper Fisher Jurvetson and TDI. Chroma’s Chief Scientist, Dr. Fredric Young, is a theoretical biophysicist, former NIH researcher, early Genentech employee, and inventor of several patented, breakthrough technologies, including ImageGenetics®, a biomathematical pattern recognition technology. www.chromagraphics.com   (241 words)

Chroma Sampling: An Investigation   (Site not responding. Last check: 2007-10-29) Separate luma and chroma are used so that the resolution of the chroma can be reduced with respect to the resolution of the luma so that large savings cand be made in the amount of data that needs to be transmitted - it is a form of compression. The chroma of the BetacamSP is also showing significant differences from the original Digital Betacam, of similar magnetude to that of the DVCAM differences, but again we see clearly that the chroma resolution is somewhere between that of Digital Betacam and DVCAM. I have spent the last year working with the chroma components of DV format video in an attempt to develop smart algorithms that would allow the quality of upsampled chroma to be improved beyond what "simple" interpolation offers especially for use when chroma keying from DV sources or for up-rezzing DV to HD formats. www.nattress.com /Chroma_Investigation/chromasampling.htm   (3409 words)

CHROMA * chamber ensemble   (Site not responding. Last check: 2007-10-29) CHROMA then joins innovative and acclaimed opera company Tête à Tête for workshops of a new version of Homer's Odyssey taking place on the Shetland Islands, involving a company of singers, musicians and local knitters and spinners. CHROMA also has an active programme of outreach and education work, varying from concerts in hospitals and schools to composer’s workshops and masterclasses. CHROMA is currently Ensemble-in-Residence at the University of London’s Royal Holloway and Bedford College, and continues to host composer's workshops for the students there. www.nocommentary.co.uk /chroma/about.htm   (697 words)

chroma key This is because the feathering value is being re-calculated at every frame and, while softening the edge of the key a great deal, it is actually including parts of a transition between chroma color and subject. In choosing a method for that initial Chroma Key stage, one can choose from keying an expandable and collapseable range of colors, a linear color key, a difference matte and an extract matte. Another bonus of using AE for your Chroma Keying is that you can use a SEED PROJECT for all your footage that uses the same lighting and subject matter. www.lafcpug.org /chroma_key_part_2.html   (3684 words)

Rhodes Chroma · Vintage Synthesizers The Chroma represents what could be thought of as the second generation of analog/digital hybrid synthesizer instruments. The Chroma also helped usher in a concept that annoyed some synthesizer programmers: menu-driven voice programming with a single data slider and multiple dual-function membrane switches (which probably influenced Yamaha in their design of the DX7). CBS bought the Chroma design, assigned it to their Rhodes division, and hired Philip Dodds and the former ARP engineering team to produce the synthesizer. www.rhodeschroma.com /?id=vintage   (2526 words)

WizKids - Mage Knight Chroma is an excellent example of offense through passivity. You may want to be more cautious with her when she’s at the end of her dial, but she does pick up Dodge to help prolong her life or until she can be healed. Chroma's overall feel made it so that she practically designed herself. wizkidsgames.com /mageknight/article.asp?cid=38867&frame=figuregallery   (252 words)

Chroma Keying in Final Cut Pro HD Chroma keying is a really useful skill to add to your effects creation toolset. In this article, I'll be attempting to use the FCP Chroma Keyer on "Linda", which is one of the more difficult keying jobs that I have faced in the past few years. Chroma keying often alters certain color values, so it's a good idea to do a color correction pass to your subject (and/or your background). www.kenstone.net /fcp_homepage/chroma_key_fcp_hd_monahan.html   (6351 words)

H.264/MPEG-4 AVC - Wikipedia, the free encyclopedia For chroma the resolution is typically halved (see 4:2:0) therefore the motion compensation precision is down to one-eighth pixel. An exact-match integer 4×4 spatial block transform (similar to the well-known DCT design), and in the case of the new FRExt "High" profiles, the ability for the encoder to adaptively select between a 4×4 and 8×8 transform block size for the integer transform operation. A secondary Hadamard transform performed on "DC" coefficients of the primary spatial transform (for chroma DC coefficients and also luma in one special case) to obtain even more compression in smooth regions. en.wikipedia.org /wiki/H.264   (3793 words)

Chroma's Company Information CSS supports Chroma ATE's existing product lines of automatic power supply test systems, power instrumentation and PXI instruments as well as develops a number of yet-to-be-announced new products which the company plans to develop in the coming years. Chroma's Irvine facility has both hardware and software engineers on staff and is fully staffed for repairs, calibrations and to provide technical assistance to our customers. Chroma ATE, Inc. is a publicly traded company on the Taiwan stock exchange with sales in excess of $80MM U.S. Chroma's Test and Measurement Business Unit is a world leader of power supply ATE and related instrument products and is headquartered in Taipei. www.chromausa.com /company.htm   (204 words)

Chroma Chem Pty Ltd   (Site not responding. Last check: 2007-10-29) The mission of Chroma Chem is to develop quality consumer safety products and licence manufacturing and distribution of them to the packaging and bottling industries internationally. Located in Adelaide Australia, Chroma Chem Pty Ltd began operating as a new business focussing on the development and licensing of packaging safety products on 3 June 2002. Chroma Chem has developed a range of indicators that ensure greater security and safety for packaging. www.chroma-chem.com   (180 words)

Upgrading the Rhodes Chroma Power Supply In the case of the Chroma we have a sizable current draw from the microprocessor circuitry (which itself creates a certain amount of switching noise). The Chroma uses static RAM chips for patch memory, and it is likely that the select and write lines of the chips will go through inappropriate chaotic changes as the power is turned on or off. The original Chroma power supply had four male Molex connectors soldered into the power supply pc board, and cables plugging into those ran to the I/O board, the Channel Motherboard and the EQ board. www.till.com /articles/ChromaPowerSupply   (1478 words)

CHROMA sequence annotator   (Site not responding. Last check: 2007-10-29) CHROMA: consensus-based colouring of multiple alignments for publication. The output from CHROMA can be edited and ultimately printed out with high fidelity in other programmes such as Microsoft Word You may also read the documentation on-line when it is ready. www.lg.ndirect.co.uk /chroma   (277 words)

Chroma subsampling in JPG compression Chroma subsampling is a method that stores color information at lower resolution than intensity information. Chroma subsampling may be a reasonable compression strategy for high resolution images, but for color web images, one is better served by turning off chroma subsampling and compressing more aggressively to achieve the same file size. One should note that turning off chroma subsampling may not always be the wisest choice for compromising between file size and image quality. www.wfu.edu /~matthews/misc/jpg_vs_gif/JpgCompTest/JpgChromaSub.html   (982 words)

Chroma Energy - Home Page   (Site not responding. Last check: 2007-10-29) Chroma Energy is a technology based software and service company to the oil and gas industry. We provide a ‘full spectrum’, best of breed interpretation system to both domestic and international E and P companies using a fully integrated petroleum systems analysis. Services include prospect generation, evaluation and high-grading, large seismic volume data mining, AVO/AVA analysis and reservoir characterization utilizing seismic inversion, pattern recognition and conventional mapping. www.chromaenergy.com   (75 words)

Chroma Key Lighting Remember, Chroma Key is much more than just a “turn it on - turn it off” feature on a digital mixer. With that tape now playing as the incoming source, set up your Chroma Key and let that gigantic backdrop be filled in with Mount Everest or the Empire State Building. Another “color bleeding” problem solver for Chroma Key is the use of amber-colored gels over your backdrop illumination lights. www.studio1productions.com /Articles/ChromaLighting.htm   (1038 words)

If you want an economy 24"printer, and are considering the Encad Chroma 24, you might wish to check out other 24 inch ... But since oldies such as the Encad Chroma 24 are available by the hundreds in the used printer arena, it is necessary to provide suggestions. This is not entirely the blame of the printer (but is the fault of the printer company who does not inform end-users of this aspect of reality). Because if you go for a Chroma 24, there is no one you can count on to assist you. www.large-format-printers.org /EncadChroma24largeformatprinter/Encad_Chroma_24_inchprinter.htm   (1607 words)

Chroma   (Site not responding. Last check: 2007-10-29) Powers: Chroma could create a rainbow of energy that caused massive electrical disturbances in the atmosphere. The Infinitors argued among themselves while trying to decide what to do with Chroma, and he took this opportunity to return to space. In pre-Crisis DC continuity Chroma was active in the Earth-2 universe. www.angelfire.com /ar/hellUSA/Chroma.html   (224 words)

Chroma Systems Solutions, Inc. Chroma is a world recognized leader in power supply testing equipment which includes automated power supply test systems, electronic loads, programmable AC power supplies and related equipment to support the power conversion industry. Chroma is a leading worldwide supplier of automated testing equipment to the power conversion industries. Chroma Systems Solutions provides a unique PXI/cPCI Power Supply Card designed to offer the ATE integrator an option to lower System size and cost. www.chromausa.com   (307 words)

Keyboard Magazine - Chroma Dodds is particularly proud of one reaction at the Chroma’s unveiling at the summer 1982 NAMM show in Atlanta: “Bob Moog came up, sat down, and played it for a few minutes. The Chroma also helped usher in a concept that annoyed some synthesists: Menu-driven voice programming with a single data slider and multiple dual-function membrane switches — undeniable influences on Yamaha in their design of the DX7. CBS bought the Chroma design, assigned it to their Rhodes division, and hired Philip Dodds and the former ARP engineering team to produce the Chroma. www.keyboardmag.com /story.asp?storycode=11135&newstype=A   (958 words)

Chroma Colour Imaging - News Chroma have teamed up with Slide File, Dublins leading stock photography agency to produce a digitally printed calendar for the next millennium. The calendar was designed by Chroma and highlights the variety of images carried by A limited run of 300 of the calendars were printed and most have been distributed to clients of both Slide File and Chroma. www.chroma.ie /news.html   (312 words)

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