Chromatic aberration
The concept ofaberration color covers several different optical phenomena (Chromatic Aberration, Longitudinal chromatic aberration) Which result from any unwanted color fringes around the elements of an image. This is because in a converging lens for example, radiation of shorter wavelengths (purple / blue) converge closer to the lens than the wavelengths longer (red): the diffraction is not for all colors with the same angle. This phenomenon is particularly visible around transitions high Contrast in relatively neutral image.
Direct access
Instructions for writing or reading data by using addresses that identify their location.
English: direct access, random access.
Multiple Access
Technique that allows multiple devices to access a common resource shared
- According to a technical breakdown in the weather (TDMA or TDMA: time division ...)
- Or by a technical breakdown in frequencies (FDMA or FDMA: frequency division ...)
- Or by carrier detect (see CSMA / CD)
Sequential access
Instructions for writing or reading data, conducted by following a predetermined order of arrangement.
English: serial access.
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