Overview of LEADTOOLS JBIG and JBIG2 Image Compression SDK Technology
LEADTOOLS completely supports bitonal, grayscale and color image data, and can make full use of JBIG and JBIG2 compression and decompression technology. LEADTOOLS also supports the progressive capability of JBIG, which is the ability to store and send multiple representations of images at different resolutions without any extra storage overhead.
To achieve the highest compression ratios possible, LEADTOOLS takes full advantage of all the functional blocks of the JBIG compression standard:
- The Adaptive Arithmetic Encoder, which presents the heart of this format, has the ability to predict
and hence encode future data symbols based on the data which is being currently encoded.
- The Adaptive Template Block provides real coding gain for images rendered by grayscale with halftoning. This gain ratio approaches 80% in some situations.
- The Typical Prediction Block speeds implementations and provides some coding gain.
- The Resolution Reduction Block is used to get a lower resolution version of an image so that no loss
of data is encountered. This is mainly important for bi-level images, to avoid any deletion of thin lines.
- The Deterministic Prediction Block provides good coding gain when saving more than one resolution layer in the same file.
LEADTOOLS also supports JBIG2. JBIG2 is a raster file format created by ISO/IEC 14492 and is an industry standard lossless and lossy compressed file format for bitonal image data. LEADTOOLS supports the various JBIG2 flavors of text and generic region encoding and decoding procedures based on sequential coding of the image pixels using arithmetic coding. Saving images in as JBIG2 results in smaller image file sizes when compared to other industry standard compressed formats such as JBIG, CCITT G3 or G4. JBIG2 can compress bitonal images 2 - 5 times better than the same image compressed with CCITT G4 compression. .
JBIG Defined:
JBIG is an acronym for 'Joint Bi-level Image experts Group'. This was a group of experts nominated by national standards bodies and major companies to work to produce standards for bi-level image coding. The JBIG group has developed IS 11544 (ITU-T T.82) standard for the lossless compression of a bi-level image. JBIG can also be used for coding grayscale and color images with limited numbers of bits per pixel. JBIG is similar to Group 3 or Group 4 fax, but offers between 20% and 80% improvement in compression over these methods. JBIG compression averages about a 20:1 over the original uncompressed image.
Other LEADTOOLS SDK Technologies Related to JBIG and JBIG2 Image Compression
LEADTOOLS SDK Products that Include JBIG and JBIG2 Image Compression
Hover over each product for a description. Click for more details.
LEADTOOLS Mobile Imaging is a full featured mobile raster imaging SDK the Microsoft .NET Compact Framework and supports load, save, decompression and compression of many industry standard and proprietary image formats via .NET Compact Framework classes. Advanced document imaging and barcode support is available. Developers have access to LEADTOOLS imaging functionality for applications designed to run on devices such as personal digital assistants (PDAs) and mobile phones. LEADTOOLS Mobile Imaging SDK supports Pocket PC, SmartPhone, WinCE Standard SDK 4.2 and WinCE Standard SDK 5.0.
The LEADTOOLS Document Imaging SDK is a comprehensive document imaging SDK. Some of the features included are image annotation, memory optimizations for bitonal image data and enhanced display of black and white images. Additionally, LEADTOOLS Document Imaging supports the load, save, decompression and compression of over 150 image formats via C DLL, C++ classes, .NET classes, WIC codecs, WF activities and WCF services. Also includes extended grayscale and color support such as 12 and 16 bit grayscale data and 48 and 64 bit color data.
The LEADTOOLS Recognition Imaging SDK includes everything a developer needs to create solutions to OCR document images and process form images. Some of the features included are OCR with text searchable PDF output, MICR, forms recognition and processing, image processing to improve recognition performance, and full barcode support.
The LEADTOOLS Document Imaging Suite SDK is the most comprehensive document imaging SDK available. Some of the features included are OCR with text searchable PDF output, MICR, forms recognition and processing, image processing to improve recognition performance, full barcode support, EMF to document format conversion, printer output capture and raster PDF load, save, conversion and compression.
The LEADTOOLS Medical Imaging SDK includes complete DICOM dataset support as well as medical image viewing functionality. LEADTOOLS Medical Imaging is a full featured raster, document and medical imaging SDK that supports load, save, decompression and compression of over 150 image formats via C DLL, C++ classes, .NET classes, WIC codecs, WF activities and WCF services. Also includes extended grayscale and color support such as 12 and 16 bit grayscale data and 48 and 64 bit color data.
LEADTOOLS PACS Imaging is a full featured PACS, raster, document, medical imaging SDK that includes functions to implement a complete PACS client and server solution as well as medical imaging functionality. LEADTOOLS PACS Imaging SDK supports the load, save, decompression and compression of over 150 image formats via C DLL, C++ classes, .NET classes, WIC codecs, WF activities and WCF services. Also includes extended grayscale and color support such as 12 and 16 bit grayscale data and 48 and 64 bit color data.
LEADTOOLS Medical Imaging Suite is a full featured PACS, raster, document, and medical imaging SDK that includes functions to implement a complete PACS client and server solution as well as medical imaging, medical 3D, and multimedia functionality. LEADTOOLS Medical Imaging Suite SDK supports the load, save, decompression and compression of over 150 image formats via C DLL, C++ classes, .NET classes, WIC codecs, WF activities and WCF services. Also includes extended grayscale and color support such as 12 and 16 bit grayscale data and 48 and 64 bit color data.
|
