Contex IQ 2400 Series, Technical Service Manual

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Service Guide IQ / IQ Quattro
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Emulsion
The light sensitive silver, coated on the clear acetate film base, that forms the photograph when a picture is taken and the film is developed.
Equalizing
Distributing all color or tone equally along a density range.
File Format (image)
The format in which a scanned picture is saved. Many programs can insert or import a picture from a file, if it is saved in a file format that the program supports.
Common file formats include TIFF (Tagged Image File Format), BMP (Windows bitmap), JPEG (Joint Photograph Expert Group), and FPX (FlashPix format).
Flip Horizontal
To flip the picture left/right.
Foreground
Foreground when scanning raster data (black and white, or monochrome data) refers to the pixels that represent data of interest (background refers to everything
else). Typically, lines and shapes are represented by black pixels (foreground) and empty space is represented by white pixels (background). When scanning
grayscale data, background means the gray level of a region of pixels that surrounds some desired foreground data.
Gamma Adjustment
An adjustment that makes the tone distribution lighter or darker in an image.
Gamut Transformation
Color Management System function, where out-of-gamut colors are converted to colors within the gamut of the targeted device, e.g., a printer.
Gamut
The color range scanable, printable or displayable by a device; e.g., if some of the displayable colors are outside of the gamut of the printer they cannot be printed.
GCR
Gray component replacement. A color separation setting used on color photographs where cyan, magenta and yellow inks are replaced by black ink (in a balance
that would yield a gray value). The advantages are a reduction in overall ink usage and some increase in image detail.
Grayscale
A term for a black and white photographic image or a scanner setting. Refers to the range of 256 gray tones that make up the image.
Half-toning
The processes of offset printing and laser printing are intrinsically bilevel. However, these devices can reproduce a range of tone levels by halftoning; e.g., an array
of widely spaced dots produces the perception of light gray, and an array of tightly spaced dots produces dark gray. Halftone dots are usually placed in a regular
grid. In color printing it is conventional to use cyan, magenta, yellow and black grids that have exactly the same dot pitch but different carefully-chosen screen
angles.