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Perceptual MegaPixel
The Perceptual MegaPixel (P-MP) is a proprietary ranking of lens-camera combinations, created by DxO Labs. It is intended to express the resolution of which a combination of camera and lens is capable. Complete scientific or technical documentation of the process used to compute P-MP values has never been published, and P-MP measurements have never been made without the cooperation of DxO Labs. The name of the measurement is a trade mark A trademark (also written trade mark or trade-mark) is a type of intellectual property consisting of a recognizable sign, design, or expression that identifies products or services from a particular source and distinguishes them from oth .... The P-MP meant for photographers to consider when comparing the sharpness of a combination of camera and lens. DxO Labs claims that P-MP is a more accurate and relevant value for photographers to consider when weighing-up camera sharpness. As of March 2017, the "Canon EF 300mm f/2.8L IS II USM" l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DxO Labs
DxO is a French company dedicated to photography. Founded in 2006, it is located in Boulogne-Billancourt. It markets DxO PhotoLab, ViewPoint, and FilmPack image processing software and a connected camera, the DxO ONE. History DxO created DxOMark.com, which provides image quality ratings for standalone cameras, lenses, and mobile devices that include cameras. However it has spun off from them, DxOMark Image Labs. On October 25, 2017, DxO announced the acquisition of the Nik Collection assets from Google. Products DxO PhotoLab DxO PhotoLab is software which corrects various optical aberrations, notably image distortion, with corrections tuned to particular lenses and cameras. It also adjusts lighting and color rendering. The software reads the Exif file to gather information about the camera, the lens and the settings that were used. Its automatic optical adjustment can fix: * Distortion of curved line (should be straight) * Color fringes * Light fall off of vignetting * Make s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Image Resolution
Image resolution is the detail an image holds. The term applies to digital images, film images, and other types of images. "Higher resolution" means more image detail. Image resolution can be measured in various ways. Resolution quantifies how close lines can be to each other and still be visibly ''resolved''. Resolution units can be tied to physical sizes (e.g. lines per mm, lines per inch), to the overall size of a picture (lines per picture height, also known simply as lines, TV lines, or TVL), or to angular subtense. Instead of single lines, line pairs are often used, composed of a dark line and an adjacent light line; for example, a resolution of 10 lines per millimeter means 5 dark lines alternating with 5 light lines, or 5 line pairs per millimeter (5 LP/mm). Photographic lens and film resolution are most often quoted in line pairs per millimeter. Types The resolution of digital cameras can be described in many different ways. Pixel count The term ''resolution'' is o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trade Mark
A trademark (also written trade mark or trade-mark) is a type of intellectual property consisting of a recognizable sign, design, or expression that identifies products or services from a particular source and distinguishes them from others. The trademark owner can be an individual, business organization, or any legal entity. A trademark may be located on a package, a label, a voucher, or on the product itself. Trademarks used to identify services are sometimes called service marks. The first legislative act concerning trademarks was passed in 1266 under the reign of Henry III of England, requiring all bakers to use a distinctive mark for the bread they sold. The first modern trademark laws emerged in the late 19th century. In France, the first comprehensive trademark system in the world was passed into law in 1857. The Trade Marks Act 1938 of the United Kingdom changed the system, permitting registration based on "intent-to-use", creating an examination based process, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
