IMF_FORMAT Enumeration

The multi-page file types (TIFF, DCX, MAX, PDF, JBIG) can contain pages compressed by different methods in the same file. Thus image format must be given page-by-page.

Images to be loaded from image files (or to be stored to disk) can be in different formats. The main attributes of these files are:

• the image type, i.e. the bit depth (B/W, 4 or 8-bit grayscale or color),
• whether the image file contains only one or more images,
• what kind of image compression has been used, if any.

The IproPlus does not support all the file formats listed here in the same way. Some of them can be read but cannot be created; other formats are supported by the IproPlus only for B/W images, etc.

• Currently the FF_PDA, FF_BMP_RLE4 formats are not supported at all.
• The FF_PCX, FF_DCX, FF_BMP_NO, FF_BMP_RLE8, FF_TIFNO, FF_TIFPB, and FF_PNG are supported by the IproPlus for both reading and writing and for all image types (B/W, 4-bit grayscale, 8-bit grayscale, 8-bit palette-color and 24-bit true-color).
• Some other TIFF formats like FF_TIFHU, FF_TIFG31, FF_TIFG32, FF_TIFG4 and the FF_SIM formats support reading and writing B/W images only.
• The three JPEG formats and FF_TIFJPGNEW images are supported by the IproPlus only for 8-bit grayscale and 24-bit color images.
• If a 4-bit grayscale image in the IproPlus is to be saved to JPEG format, it will be automatically converted to an 8-bit grayscale one. Saving a B/W image into JPEG format is not supported.
• With this toolkit version, the support of the At Work Document images (FF_AWD) has been removed. Microsoft no longer supports this format either.
• Image formats supporting multi-page image files are the different TIFF formats, DCX, PDF, JBIG and the PaperPort MAX formats.

In addition to the image file formats above, the CSDK also supports TIFF-FX files for reading.

Reference