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EIA 1956 Resolution Chart
The EIA 1956 Resolution Chart (until 1975 called RETMA Resolution Chart 1956) is a test card originally designed in 1956 to be used with black and white analogue TV systems, based on the previous (and very similar) RMA 1946 Resolution Chart. It consisted of a printed chart filmed by a TV camera and displayed on a TV screen. Inspecting the chart allowed to check for defects like ringing, geometric distortions, raster scan linearity, cathode-ray tube uniformity and lack of image resolution. If needed, a technician could used it to perform the necessary hardware adjustments. Today, this chart continues to be used to measure image resolution of modern cameras and lenses and also in scientific research. Features and operation The chart is composed of several features, each designed for a specific test: *Large white circle: Allows for image geometry adjustments (image should be centered with the circles being perfectly round). *Vertical stripe boxes: A grating with a resolution of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EIA Resolution Chart 1956
Eia or EIA may refer to: Medicine * Enzyme immunoassay * Equine infectious anemia * Exercise-induced anaphylaxis * Exercise-induced asthma * External iliac artery Transport * Edmonton International Airport, in Alberta, Canada * Erbil International Airport, in Kurdistan Region, Iraq * Evergreen International Airlines, an American airline Other uses * Eia, a former Medieval manor that is now part of Central London * Electronic Industries Alliance, formerly Electronic Industries Association, an American trade organization ** EIA standards * Emerging issues analysis * Emirates Investment Authority * Energy Information Administration of the United States Department of Energy * Environmental impact assessment * Environmental Investigation Agency, a British environmental organisation * Equity-indexed annuity * European Inventor Award, awarded annually by the European Patent Office * International Anticommunist Entente (French: ') People with the surname * Harald Eia Harald Meld ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
