Optical resolution

Optical resolution
Many scanners and some digital cameras have two resolution figures quoted in their spec sheets - optical and interpolated.

Optical resolution
Techniques Glossary Optical resolution
Many scanners and some digital cameras have two resolution figures quoted in their spec sheets - optical and interpolated.

Optical Resolution
Optical resolution is often the lead specification in scanner advertisements. After all, it's usually the first concern-as well as one of the more confusing factors-for newcomers.

optical resolution
the maximum physical resolution of a device. Optical resolution provides better quality than interpolated resolution of the same number, which uses software to create additional image information.

Optical Resolution - The resolution of a scanner that is calculated by dividing the width of the scanned area by the number of pixels in the CCD.

Optical Resolution
The physical resolution at which a device can capture an image. The term is used most frequently in reference to optical scanners and digital cameras.
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Optical Resolution is an absolute number that the camera's image sensor can physically record.

Optical Resolution
The maximum physical resolution that a device or system is capable of capturing without aid of interpolation. Often used to define the native resolution of scanners.
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optical resolution
Maximum spatial resolution without recourse to interpolation. Resolution imaged by optical system in a capture device without subsequent software interpolated pixels.
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Optical resolution. The resolution that a scanner uses to sample the original image. This is often different from the highest resolution quoted for the scanner, as this is scaled up by interpolating the optically scanned file.

Optical resolution
The true resolution of a scanner and the key factor in determining the amount of detail visible in a image. Optical resolution is one type of resolution; the other is interpolated resolution.

Optical Resolution - The true level of resolution (image detail) found in a flatbed scanner.

OTF - Off the film.

The horizontal optical resolution of the scanner is determined by the number of photosites on its sensor. However, the vertical resolution is determined by the distance the paper or light source advances between scans.

Scanners rated like this have an optical resolution of 1200 dpi and a 'mechanical' resolution of 2400 dpi. In this situation the 2400 dpi resolution is only really available in the motion direction of the media or scanning head.

This is called optical resolution and is measured by how many pixel the scanner can actually see. A 300 dpi scanner can capture 300 dots per inch. Scanner head moves in one direction capturing 300 dots per inch.

True scanner resolution is optical resolution, not interpolated resolution. Interpolated resolution will read higher than optical because it's been enhanced by the software bundled with the scanner.

Canon FS4000US film scanner provides an impressive 4,000 dpi optical resolution. Including both SCSI-2 and USB interfaces, 14-bit A/D conversion, and autofocus, this film scanner offers an excellent mix of professional functions.

You need to look for "optical resolution" in scanners, or actual active CCD pixel count in each horizontal and vertical direction in cameras.
FILE TYPES: (see details at File Formats and exapmples at D200 Quality Settings.) ...

That resolution is known as the camera's optical resolution. Some cameras, however, use built-in software coding to capture images with resolution than exceeds the camera's hardware limitations.

This is commonly known as digital zoom and results in a lower quality image than optical zoom, as no optical resolution is gained.

See also: Digital, Resolution, Image, Camera, Photograph