References ▼
LEADTOOLS supports reading and writing of the following 1-bit formats that are commonly used in FAX transmissions:
TIFF CCITT. These are compressed TIFF files that are commonly used for FAX transmission and document imaging.
TIFF CCITT Group 3. These are TIFF CCITT files in a format that is more advanced and more compressed than TIFF CCITT. LEADTOOLS supports both 1-dimension and 2-dimension variations of this format.
TIFF CCITT Group 4. These are TIFF CCITT files in a format that is more advanced and more compressed than TIFF CCITT Group 3.
TIFF (Class-F). Class-F is the TIFF extension for fax documents. LEADTOOLS supports Class-F compatible tags.
For more information refer to Tagged Image File Format (TIFF / BigTIFF).
CALS Raster (Type 1, 2, 3, and 4). These are CCITT Group 4 CALS raster files. CALS is a United States government standard. CALS3 are multipage files.
The file constants associated with this file format are:
| Constant | Read Support | Write Support | Description |
|---|---|---|---|
| FILE_CALS | 1 BPP | 1 BPP | [50] CALS Raster file. |
| FILE_CALS2 | 1 BPP | 1 BPP | [130] CALS CCITT G4 compressed. |
| FILE_CALS3 | 1 BPP | 1 BPP | [131] CALS Fax Group 4 compressed. |
| FILE_CALS4 | 1 BPP | 1 BPP | [129] CALS CCITT G4 Tiled. |
IOCA (ICA). This is the Image Object Content Architecture developed by IBM. LEADTOOLS supports these files in a MO:DCA wrapper with embedded 1-bit CCITT Group 3 or Group 4 images. LEADTOOLS also supports IOCA files without a MO:DCA wrapper.
For more information refer to Image Object Content Architecture Format (IOCA/MODCA).
WinFax Group 3. This is a FAX format created by Delrina for Group 3 support.
WinFax Group 4. This is a FAX format created by Delrina for Group 4 support.
The file constants associated with this file format are:
| Constant | Read Support | Write Support | Description |
|---|---|---|---|
| FILE_WFX_G3_1D | 1 BPP | 1 BPP | [69] Winfax, compressed using CCITT group 3, 1 dimension |
| FILE_WFX_G4 | 1 BPP | 1 BPP | [70] Winfax, compressed using CCITT group 4. |
FAX Group 3. This is a raw FAX format (without a header) for Group 3 support. LEADTOOLS supports both 1-dimension and 2-dimension variations of this format.
FAX Group 4. This is a raw FAX format (without a header) for Group 4 support.
The file constants associated with this file format are:
| Constant | Read Support | Write Support | Description |
|---|---|---|---|
| FILE_FAX_G3_1D | 1 BPP | 1 BPP | [66] Raw FAX, compressed using CCITT group 3, 1 dimension. |
| FILE_FAX_G3_1D_NOEOL | 1 BPP | 1 BPP | [162] Raw FAX, compressed using CCITT group 3, 1 dimension.with no EOL. |
| FILE_FAX_G3_2D | 1 BPP | 1 BPP | [67] Raw FAX, compressed using CCITT group 3, 2 dimensions. |
| FILE_FAX_G4 | 1 BPP | 1 BPP | [68] Raw FAX, compressed using CCITT group 4. |
TIFF-FX. These are Internet Fax files developed and used by Xerox. This format supports several types of compression, which allows the user or developer to use the compression that best suits his or her needs. In addition, this file format can be extended as the need arises. The following modes are supported:
Minimal Black and White: This mode uses binary MH compression (T.4).
Extended Black and White: This mode uses binary MH, MR and MMR compression (T.4 and T.6), which uses FAX Groups 3 1D, FAX Groups 3 2D and Fax Group 4 compressions.
Lossless JBIG Black and White: This mode uses JBIG compression (T.85, T.82). Supported in Document and Medical Imaging toolkits.
Lossy Color and Grayscale: This mode uses JPEG compression (T.42, T.81).
Lossless Color and Grayscale: This mode uses JBIG compression (T.43, T.82). Supported in Document and Medical Imaging toolkits.
The default extensions used by this format is: TIFX, TIFF.
This file format does support multipage files.
The file constants associated with this file format are:
| Constant | Read Support | Write Support | Description |
|---|---|---|---|
| FILE_TIFX_JBIG | 1 BPP | 1 BPP | [269] TIFF-FX format. JBIG compressed. Supported in Document and Medical Imaging toolkits. |
| FILE_TIFX_JBIG_T43 | 3 BPP | 3 BPP | [270] TIFF-FX format. JBIG compressed. Supported in Document and Medical Imaging toolkits. |
| FILE_TIFX_JBIG_T43_ITULAB | 8 BPP | 8 BPP | [271] TIFF-FX format. JBIG compressed. Supported in Document and Medical Imaging toolkits. |
| FILE_TIFX_FAX_G4 | 1 BPP | 1 BPP | [273] TIFF-FX format, compressed using CCITT group 4. |
| FILE_TIFX_FAX_G3_1D | 1 BPP | 1 BPP | [274] TIFF-FX format, compressed using CCITT group 3, 1 dimension. |
| FILE_TIFX_FAX_G3_2D | 1 BPP | 1 BPP | [275] TIFF-FX format, compressed using CCITT group 3, 2 dimensions. |
| FILE_TIFX_JPEG | 8 BPP (Grayscale), 24 BPP | 8 BPP (Grayscale), 24 BPP | [276] TIFF-FX format. JPEG compressed. |
LaserView LaserData. The LaserData file format is a legacy Group 4 compressed FAX format.
The file constants associated with this file format are:
| Constant | Read Support | Write Support | Description |
|---|---|---|---|
| FILE_LASERDATA | 1 BPP | None | [121] LaserData CCITT G4 |
Win32, x64.
NOTES:
To save a region inside a TIFF file, you must have an unlocked Vector, Document, or Medical Imaging license.
This format does not support LEAD's redirected IO feature, therefore it cannot be used with: LMemoryFile::LoadMemory, LMemoryFile::LoadMemoryTile, LMemoryFile::Save or LFile::FeedLoad.
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