User`s guide

96 Technical information
Supported file types
The program supports a wide range of file types for images and text.
File types for opening and saving images
Input image files can have resolutions up to 600 dpi, but 300 dpi (both
horizontally and vertically) is recommended for optimum OCR accuracy.
The program stores black-and-white images at their original resolution,
but grayscale and color images are not usually saved above 150 dpi. That
means these are not good candidates for future OCR processing.
Hover the cursor over a page thumbnail for a popup window showing the
size and resolution of the original image.
If you try to save a black-and-white image to JPEG format, the program will offer
conversion to grayscale. With TIFF G3 and G4 it will offer conversion to black-
and-white.
Saving to PDF format is supported in OmniPage Pro 12, with five options. Two
of these, Image only and Image on text, export original images. This is done in the
Save As dialog box for recognized pages. See “Saving to PDF” on page 86. Saving
to PDF is not available in OmniPage SE. Also, OmniPage SE cannot handle GIF
and TIFF LZW files.
File type Extension
Multi-
page
Open / Save
B/W, Grayscale,
Color
BMP, Bitmap bmp No Open and Save All
DCX dcx Yes Open and Save All
GIF gif N/A N/A N/A
JPEG jpg No Open and Save Grayscale, color
MAX max Yes Open and Save All
PCX pcx No Open and Save All
PDF pdf N/A N/A (see note) N/A
PNG png No Open and Save All
TIFF Compressed G3 tif Yes Open and Save B/W
TIFF Compressed G4 tif Yes Open and Save B/W
TIFF Compressed LZW tif N/A N/A N/A
TIFF FX xif Yes Open All
TIFF PackBits tif Yes Open and Save All
TIFF Uncompressed tif Yes Open and Save All