Difference between revisions of "Digital camera"
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Digital cameras have only optical elements like the lenses in common with traditional film cameras. They use an optoelectronic chip - often a ([[CCD]]) - instead of a [[film]]. The lens projects the picture onto the CCD. The signals for brightness and colour of each singular smallest unit of the chip (pixel) are transfered into a digital memory device. Each digital picture is a file of such pixelwise informations. Usually a little one-chip-computer (camera processor) controls such a camera. This computer changes the raw file's format into a compressed file format, for example the JPEG-Format. Some cameras offer an option to let the camera store the raw data uncompressed. A serial interface for connection to a computer makes the image-files available for reworking them with imaging software. | Digital cameras have only optical elements like the lenses in common with traditional film cameras. They use an optoelectronic chip - often a ([[CCD]]) - instead of a [[film]]. The lens projects the picture onto the CCD. The signals for brightness and colour of each singular smallest unit of the chip (pixel) are transfered into a digital memory device. Each digital picture is a file of such pixelwise informations. Usually a little one-chip-computer (camera processor) controls such a camera. This computer changes the raw file's format into a compressed file format, for example the JPEG-Format. Some cameras offer an option to let the camera store the raw data uncompressed. A serial interface for connection to a computer makes the image-files available for reworking them with imaging software. | ||
| − | The term [[Analog Camera]] should refer to non-digital electronic cameras, which also have no film, such as the Olympus VC-100 still camera and most older video/TV cameras - not, as is sometimes mistakenly intended, to film cameras. | + | The term [[Analog Camera]] should refer to non-digital electronic cameras, which also have no film, such as the [http://www.olympus-global.com/en/corc/history/camera/electronic.cfm#01 Olympus VC-100 still camera] and most older video/TV cameras - not, as is sometimes mistakenly intended, to film cameras. |
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Revision as of 14:41, 5 March 2008
Digital cameras have only optical elements like the lenses in common with traditional film cameras. They use an optoelectronic chip - often a (CCD) - instead of a film. The lens projects the picture onto the CCD. The signals for brightness and colour of each singular smallest unit of the chip (pixel) are transfered into a digital memory device. Each digital picture is a file of such pixelwise informations. Usually a little one-chip-computer (camera processor) controls such a camera. This computer changes the raw file's format into a compressed file format, for example the JPEG-Format. Some cameras offer an option to let the camera store the raw data uncompressed. A serial interface for connection to a computer makes the image-files available for reworking them with imaging software.
The term Analog Camera should refer to non-digital electronic cameras, which also have no film, such as the Olympus VC-100 still camera and most older video/TV cameras - not, as is sometimes mistakenly intended, to film cameras.
