Canon FS 3.6 manual Image File, Resolution, Scan, Threshold, Tone Curve, Twain

Appendices

Image File

An image that has been expressed as a collection of dots assigned varying color and brightness values 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 the TIFF, JPEG and BMP formats.

Resolution

The density of the dots that comprise an image expressed as a collection of dots. The fineness or coarseness of an image is expressed as the number of dots per inch (dpi).

RGB

An acronym for the “three base tones of light,” red, green and blue, used in varying combinations to reproduce the full spectrum of colors on monitors and other output devices. The scanner detects red, green and blue light reflected from the original film with its sensors. Color printers use the complementary colors to RGB, namely cyan, magenta, yellow and black (CYMK) to express colors. Cyan, yellow and magenta are referred to as the “three base tones of color.”

Scan

The process whereby a scanner is used to read information off an original document or image. In CanoCraft FS, clicking the [Save] or [Scan] button causes the scanner to scan a film using various settings, such as resolution, brightness, color balance and special effects, and to save the resulting image as a file in the specified location.

Threshold

When an image is expressed using only two colors, black or white, the threshold is the dividing point at which the original data is assigned either a black or white value.

Tone Curve

See Gamma Correction.

TWAIN

The standard application programming interface for input devices, such as image scanners. If both the input device and software comply with this standard, the two are compatible regardless of the manufacturer or model type.

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