6.0

Chapter 4 - Acquiring the Image

Tip:

To start recognition immediately after the source images have been scanned, use the Scan&Read or

Scan&Read Multiple Images option:

Click the arrow to the right of the

Scan&Read button and select either Scan&Read or

can&Read Multiple Images item in the local menu.

FineReader will scan and read the images. The

Image window displaying a "photograph" of the scanned

page and the

Text window displaying the recognition results will appear in FineReader’s main window.

The recognized text may be exported to various external applications and saved in various formats.

Setting Scanning Parameters

Recognition quality depends greatly on the quality of the scanned image. The image quality may be

improved by altering the main scanning parameters: resolution, scan mode, and brightness.

The main scanning parameters are:

● Resolution - use 300 dpi resolution for regular texts (font size 10 pts. or greater) and

400-600 dpi resolution for texts set in smaller font sizes (9 pts. or less).

● Scan mode - gray.

Scanning in grayscale mode is best for recognition purposes. If you scan your images in

grayscale, brightness is adjusted automatically.

● Scan mode - black and white.

Scanning in black and white enables the system to scan at a higher speed, but at the same

time some character information is lost. This may have an 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 certain scanner models,

600 dpi resolution scanning can take up to four times longer than 300 dpi resolution scanning.

To set scanning parameters:

● If you wish to scan your images using the FineReader TWAIN interface, select the Scanner

settings

item in the Tools menu. The Scanner settings dialog will then open. Select the

scanning options of your choice in the dialog.

● 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 parame-

ters 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 circle may be used. The options available will be described in full in your scanner

documentation.