Canon CanoScan FS4000US User Manual page 119

Histogram
A graphical representation of the distribution of data bearing varying brightness values in an image.
Brightness is expressed as a value ranging from 0 to 255. The histogram shows exactly how much of
the sampled area is distributed between bright areas (highlights) and dark areas (shadows).
Image File
An image that has been expressed as a collection of dots that are assigned varying color and
brightness values and that has been converted into a data format that can be read by a computer.
The fundamental structure of an image file is a bitmap, the horizontal and vertical arrangement of the
dot information, which is supplemented by other data in popular image formats, such as TIFF, JPEG
and BMP formats.
Color Mode
A mode that is selected to scan an image. The available options are 42-bit color, 24-bit color, 14-bit
grayscale, 8-bit grayscale and black and white.
Input Resolution
When the scanner scans film it reads the image as a collection of dots. The input resolution is the
setting for how finely to read the image. Raising the value increases the image file size.
Optical Resolution
The resolution at which a scanner reads information from the object it scans. See also "dpi" and
"Resolution."
Output Resolution
The resolution for output to a printer (printing), fax, monitor (display) or file.
Pixel
The acronym for picture element. A pixel is the smallest unit forming an image.
Plug-in
Plug-in refers to software whose functions can be added by incorporation into application software.
For example, FilmGet FS for Macintosh is plug-in software (plug-in driver) that can be incorporated
into image processing software such as Photoshop LE. In this case, FilmGet FS for Macintosh can be
started up directly from the menu of that image processing software, and scanned images can be
displayed on that image processing software. See also "TWAIN."
Preview
A low resolution scan of a film image that is displayed in the preview area. The preview image is used
to inspect the image, select the area of the image for the final scan (scan area), adjust the brightness
and coloring, and carry out other image processing.
Appendices
FilmGet FS User's Guide
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