6.0

adverse effect on recognition quality in the case of documents of medium

tolow print quality.

Scan mode – color.

If you scan color documents that contain pictures, colored text, or colored

backgrounds, you may wish to retain the original colors in your electronic

document. Use the

color scan mode in this case. Otherwise use gray scan

mode.

Brightness – a medium brightness value of around 50% should suffice for

most cases. Some documents scanned in black and white mode may require

additional brightness tuning.

Note: Scanning at 400–600 dpi resolution (instead of the default 300 dpi) or scanning in

grayscale or color (instead of black & white) mode is more time consuming. In the case of cer

tain scanner models, 600 dpi resolution scanning can take up to four times longer than 300

dpi resolution scanning.

To set scanning parameters:

z If you wish to scan your images using the FineReader TWAIN interface,

select the

Scanner settings item in the Tools menu. The Scanner set

tings

dialog will then open. Select the scanning options of your choice in

the dialog.

z If you wish to scan your images using the

TWAINSource interface, your

scanner’s TWAIN dialog will open automatically when you click the

1Scan

button. Set the scanning parameters in the dialogue. Scanning options may

have different names depending on the scanner model used. For example,

for brightness the word “threshold", a “sun” symbol or a black and white cir

cle may be used. The options available will be described in full in your scan

ner documentation.

Tips on brightness tuning

The scanned image has to be legible. To check its legibility, view the image in the Zoom

window.

– an example of a good image (from an OCR point of view)

If you see that the scanned image is far from perfect (characters are glued or torn), consult

the table below to find out how you can improve image quality.

ABBYY FineReader 6.0 User’s Guide