LEADTOOLS Mixed Raster Content (MRC) C API Introduction

Summary

The LEADTOOLS Mixed Raster Content (MRC) C API incorporates image compression, file format support, and image processing into your Windows applications.

Unlike standard compression schemes, LEADTOOLS MRC compression offers programmers the advantage of programming optimal compression for documents that have both text and color images in the same file. This results in high compression factors and high detail retention.

Mixed Raster Content mode (T.44) enables different coding methods and resolutions to be used within a single page by defining a 3-layer image model for structuring and combining the scanned image data. The image is segmented and each segment is assigned a type based on the number of colors used in that segment. Segments can be combined and compressed using different compression schemes to create a file that balances quality with compression. MRC breaks an image into three different layers: foreground, background, and mask. Each layer is compressed separately using the optimal compression for that data type and is later uncompressed and recombined to restore the original image.

For more information about foreground layers and background layers, see General Information about MRC.

The Raster Content format was defined for use for color and grayscale fax as part of standard RFC-2301 (File Format for Internet Fax).

Key Features

• Automatic segmentation of image areas with the option to optimize manually.
• Manual segmentation of the image.
• Multipage saving capability.
• Compression for each area type.
• Three techniques are possible: Standard MRC T.44, LEADTOOLS MRC, or PDF by MRC segmentation.
• With LEADTOOLS MRC technique, choose from CCITT G3 1D, CCITT G4 2D, CCITT G4 or JBIG for best compression of 1 bit areas.
• With PDF segmentation through MRC technique, choose from ZIP, LZW, Fax G3 1D, Fax G3 2D, Fax G4 or JBIG2 for best compression of 1 bit areas.
• Choose from JBIG, GIF (LEADTOOLS MRC), ZIP, or LZW (PDF through segmentation) for best compression of 2 bit areas.
• Compress color areas with JPEG, CMW, CMP (LEADTOOLS MRC), ZIP, or LZW (PDF through segmentation).

Supported Environments

See Also

Reference

API Overview

Getting Started

LEADTOOLS PDF with Mixed Raster Content (PDF) File Format

LEADTOOLS Mixed Raster Content (MRC) File Format

TIFF (Tagged Image File Format) with standard MRC compression

Files to be Included with Your Application

Version History

LEADTOOLS Mixed Raster Content (MRC) C API Changes