JBIG (JBG) is an industry standard lossless compressed file format for bi-tonal (black and white), grayscale and color images. Saving images in a JBIG format results in smaller image files sizes when compared to other industry standard compressed formats such as CCITT G3 or G4.
LEADs JBIG support is comprehensive and handles all bit-sizes defined by the specification. Progressive save allows you to store and send multiple representations of images at different resolutions without any extra storage overhead.
In order to achieve highest compression ratios available by the JBIG format, LEAD also takes full advantage of all functional blocks, including the Adaptive Arithmetic Encoder, Adaptive Template Block, Typical Prediction Block, Resolution Reduction Block, and Deterministic Prediction Block.
It is possible to speed up the loading of large JBIG files. For more information, refer to Using Filter Data to Speed up Loading Large Files.
The file constants associated with this file format are:
|Constant||Read Support||Write Support||Description|
|FILE_JBIG||1, 2, 3, 4, 5, 6, 7, 8, 12, 16, 24, 32 BPP||1, 2, 3, 4, 5, 6, 7, 8, 12, 16, 24, 32 BPP|| JBIG.|
|FILE_TIF_JBIG||1, 2, 3, 4, 5, 6, 7, 8, 12, 16, 24, 32 BPP||1, 2, 3, 4, 5, 6, 7, 8, 12, 16, 24, 32 BPP|| TIFF with JBIG compression.|
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