ImageGear .NET - Updated
User Guide > File Formats and Compressions > File Formats > File Formats Reference > IMG
Full Name Xerox 9700 graphic image (IMG)
Format ID ImGearFormats.IMG
File Extension(s) *.img
Data Type Raster Image
Data Encoding Binary
Multi-Page Support No
Alpha Channel Support No
Metadata Update Support No
ImageGear Platforms Support WIN32, WIN64, Unix, Unix64, .NET, .NET64, MAC

ImageGear Supported Versions

ImageGear Supported Features

ImageGear Read Support

ImageGear Write Support


ImageGear Filter Control Parameters



The IMG header contains the width, height and resolution of the image. Following the header is compressed data. The sample values of a binary image are compressed and then encoded into a sequence of bits. Compression is achieved by predicting a pixel value based on pixel values that have already been computed. For example, the predicted value of a pixel may be that of the corresponding pixel on the previous scan line. Up to fifteen different compression techniques are used, each designed to remove redundancy from a certain kind of image - text characters, line art, and halftones of various screen frequencies. The algorithm adapts to the properties of the image by selecting the technique that will perform the best.

References Used

Xerox System Integration Standard. Raster Encoding Standard. Xerox, XNSS 178506, June 1990.