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A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.
This chart, in conjunction with the RMA 1946 Resolution Chart [35] and later widescreen patterns, is commonly used to test consumer and professional standalone, smartphone and tablet cameras for photo and videography [12] and other imaging equipment like microscopes [9] or CCTV cameras. [11] [36]
Imatest was founded by photographer/engineer Norman Koren in Boulder, Colorado in 2004 to develop software for testing digital camera image quality. Using Imatest software, a variety of image quality factors can be analyzed including Acutance (image sharpness), color response, image noise , dynamic range , tonal response, lens flare, lens ...
The DXOMARK Lens Score provides ratings for camera lenses, as tested using its proprietary tool-set in combination with various camera models. [8] [10] [17] As with the DxOMark Sensor Score, the DXOMARK Lens Score is an aggregation of five separate sub-scores; namely: sharpness, distortion, vignetting, transmission, and chromatic aberration.
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 ...
The ability of a lens to resolve detail is usually determined by the quality of the lens, but is ultimately limited by diffraction.Light coming from a point source in the object diffracts through the lens aperture such that it forms a diffraction pattern in the image, which has a central spot and surrounding bright rings, separated by dark nulls; this pattern is known as an Airy pattern, and ...
It is about 70 MP, which is currently highest-resolution single-sensor digital cinema camera (as of January 2012). [citation needed] Film 35 mm film is scanned for release on DVD at 1080 or 2000 lines as of 2005. The actual resolution of 35 mm original camera negatives is the subject of much debate.
The only way in practice to approach the theoretical sharpness possible in a digital imaging system such as a camera is to use more pixels in the camera sensor than samples in the final image, and 'downconvert' or 'interpolate' using special digital processing which cuts off high frequencies above the Nyquist rate to avoid aliasing whilst ...
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