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94 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, 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 84.
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 No Open and Save All
JPEG jpg No Open and Save Grayscale, color
MAX max Yes Open and Save All
PCX pcx No Open and Save All
PDF pdf Yes Open (see note) All
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 Yes Open and Save All
TIFF FX xif Yes Open All
TIFF PackBits tif Yes Open and Save All
TIFF Uncompressed tif Yes Open and Save All