Technology / Imaging

LEADTOOLS CCITT G3/G4 Image Compression SDK

CCITT G3/G4 Image Compression

LEADTOOLS supports CCITT Group3 and Group4 industry standards for compressing bitonal (1-bit) image data. Both Group3 and Group4 encode the source image line by line. The difference between the two algorithms is in the way the two standards handle successive scan lines.

In Group3 1D, each scan line is encoded independently, whereas in Group4, scan lines are encoded with reference to the previous one, resulting in improved compression ratios. In Group3 1D, a scan line is encoded as a set of runs, each representing a number of white or black pixels, with white runs alternating with black runs. Every run is encoded using a variable number of bits, which can be uniquely identified upon decoding. This means that frequently occurring lengths of run may be encoded very efficiently, while infrequent ones cause the data to grow. For example, a white run of 2 or 3 pixels can be encoded using just 2 bits, while a run of 1000 pixels can be encoded in 25.

Group4 encoding is more complex as compared to Group3 encoding. Each scan line is compared with the previous one. Because of this, vertical features in the source image are used to achieve high compression ratios.

There is also a Group3 2D algorithm. Group3 2D is a combination of Group3 1D and Group4 compression schemes.

Overview of LEADTOOLS CCITT G3/G4 Image Compression SDK Technology

  • Load and save CCITT G3/G4 compressed image data in many formats including TIFF, PDF and Intergraph
  • Keep 1-bit images CCITT G3/G4 compressed in memory reducing application memory footprint
  • CCITT G3/G4 image compression technology available as C DLL, C++ classes, .NET classes (C# & VB), WinRT Libraries, iOS, OS X, Android, Linux, Silverlight classes and Web services
  • Add CCITT G3/G4 image compression to single and multithreaded applications
  • Native 32 and 64-bit binaries for CCITT G3/G4 image compression

comparison Chart of Bitonal Image Compressions

Other LEADTOOLS SDK Technologies Related to CCITT G3/G4 Image Compression

LEADTOOLS SDK Products that Include CCITT G3/G4 Image Compression

Hover over each product for a description. Click for more details.

LEADTOOLS Imaging Pro SDK

LEADTOOLS Imaging Pro includes the tools developers need to add powerful imaging technology to applications. With more than 25 years of imaging development expertise, LEADTOOLS Imaging Pro includes 150+ image formats, image compression, image processing, image viewers, imaging common dialogs, 200+ display effects, TWAIN and WIA scanning, screen capture and printing.

LEADTOOLS Barcode Pro SDK

LEADTOOLS Barcode Pro includes everything developers need to detect, read and write over 100 different 1D and 2D barcode types and sub-types such as UPC, EAN, Code 128, QR Code, Data Matrix, and PDF417. By building upon the award-winning LEADTOOLS Imaging Pro features including 150+ image formats, image compression, image processing, image viewers, imaging common dialogs, 200+ display effects, TWAIN and WIA scanning, screen capture and printing, LEADTOOLS Barcode Pro offers one of the best values in barcode imaging technology on the market.

LEADTOOLS PDF Pro SDK

LEADTOOLS PDF Pro includes everything developers need to read, write, view (as raster) and edit PDF files with advanced capabilities such as the extraction of text, images, hyperlinks and metadata, updating, splitting and merging pages from existing PDF documents, converting to PDF/A as a real document, linearization, and reducing PDF document size with the LEADTOOLS PDF Optimizer. By building upon the award-winning LEADTOOLS Imaging Pro features including 150+ image formats, image compression, image processing, image viewers, imaging common dialogs, 200+ display effects, TWAIN and WIA scanning, screen capture and printing, LEADTOOLS PDF Pro offers one of the best values on the market.

LEADTOOLS Pro Suite SDK

LEADTOOLS Pro Suite is a an extensive bundle in the LEADTOOLS Pro line of SDKs and includes HTML5 Zero-footprint image viewers, barcode detect/read/write, advanced PDF read/write/view/edit, 150+ image formats, image compression, image processing, image viewers, imaging common dialogs, 200+ display effects, TWAIN and WIA scanning, screen capture and printing. Developers using LEADTOOLS Pro Suite can develop robust imaging applications and solutions at a fraction of the cost of similar feature sets found elsewhere on the market.

LEADTOOLS Document Imaging SDK

Develop powerful document imaging applications with LEADTOOLS Document Imaging. Features include advanced PDF viewing and editing, comprehensive image annotation, specialized bitonal image display and image processing. Other features include performance and memory optimizations for bitonal images, document image cleanup including inverted text, border, hole-punch and line removal, and scanning with LEADTOOLS Fast TWAIN and WIA.

LEADTOOLS Recognition Imaging SDK

The LEADTOOLS Recognition Imaging SDK is a handpicked collection of LEADTOOLS SDK features designed to build end-to-end document imaging applications within enterprise-level document automation solutions that require OCR, MICR, OMR, ICR, barcode, forms recognition and processing, PDF, print capture, archival, annotation and display functionality. This powerful set of tools utilizes LEAD's award-winning image processing technology to intelligently identify document features that can be used to recognize and extract data from any type of scanned or faxed form image.

LEADTOOLS Document Imaging Suite SDK

The LEADTOOLS Document Imaging Suite SDK is a comprehensive collection of LEADTOOLS SDK features designed to build end-to-end document imaging applications within enterprise-level document automation solutions that require OCR, MICR, OMR, ICR, barcode, forms recognition and processing, PDF, HTML5 Zero-footprint viewing, print capture, archival, annotation and display functionality. This powerful set of tools utilizes LEAD's award-winning image processing technology to intelligently identify document features that can be used to recognize and extract data from any type of scanned or faxed form image.

LEADTOOLS Medical Imaging SDK

Develop powerful Medical Imaging applications with the LEADTOOLS Medical Imaging SDK. Features include comprehensive DICOM data set support, 8-16 bit extended grayscale image support, image annotation, specialized extended grayscale image display such as window level and LUT processing, and specialized medical image processing. Other features include lossless JPEG compression, and signed and unsigned image data processing.

LEADTOOLS PACS Imaging SDK

Develop robust PACS Imaging applications with LEADTOOLS PACS Imaging. Features include Medical Web Viewer Framework, high and low-level PACS SCP and SCU functions and controls, secure PACS communication, comprehensive DICOM data set support, image annotation, extended grayscale image display such as window level and LUT processing, and specialized medical image processing. Other features include lossless JPEG compression, JPIP and signed and unsigned image data processing.

LEADTOOLS Medical Imaging Suite SDK

Develop powerful PACS and Medical imaging applications with LEADTOOLS Medical Imaging Suite. Features include Zero-footprint HTML5 DICOM Viewer, Medical Web Viewer Framework, Medical 3D, DICOM Multimedia codecs, high and low-level PACS SCP and SCU functions and controls, secure PACS communication, Print to PACS, comprehensive DICOM data set support, image annotation, extended grayscale image display such as window level and LUT processing, and specialized medical image processing. Other features include lossless JPEG compression, JPIP, and signed and unsigned image data processing.

LEADTOOLS Multimedia Suite SDK

The LEADTOOLS Multimedia Suite SDK is a comprehensive collection of multimedia development technology that provides developers with everything they need to create enterprise-level multimedia applications for a wide variety of industries including defense, broadcast, security and more. By bundling features from the Multimedia SDK, DVD Module, Video Streaming Module, MPEG-2 Transport Module, Imaging Pro SDK and Distributed Computing SDK, Multimedia Suite offers a tremendous value for the world-class technology it includes.

LEADTOOLS Online Documentation for CCITT G3/G4 Image Compression

LEAD Technologies Logo
LEADTOOLS Logo