Moire

An unwanted pattern that can occur when a halftone image is scanned or when it is scaled in an application after it has been scanned.

PICT

An industry-standard file format supported by many applications.

Pixel

Picture Element. Each image is composed of a number of pixels. Pixels are sometimes called dots.

Pixel Depth

An EPSON TWAIN setting that lets you select the amount of color information in a file.

Port

An interface channel through which data is transmitted between devices.

Resolution

Indication of how finely an image is resolved into pixels. Measured in dots per inch (dpi), pixels per inch (ppi), or sometimes samples per inch (spi).

RLE Compression

Run-Length Encoding. A type of data compression.

Saturation

The amount of color in a specific hue. Unsaturated colors tend to be pale. Saturated colors tend to be rich and vibrant.

scaling

Reducing or increasing the size of an image.

scan

An operation performed by the sensor and the carriage of a scanner. The image is divided into pixels by scanning.

Scanning Area

The physical size of the image that can be scanned by the scanner.

4 Term Glossary