ABBYY FineReader 10 User's Guide

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ABBYY FineReader 10 User’s Guide ● Do not read and analyze acquired page images automatically The scanned or opened images will be added to the FineReader document. The user will have to initiate document analysis and recognition manually. This mode is used for processing documents with a complex structure. ● Image processing methods ● Enable image preprocessing Enable image preprocessing if you need to OCR a book or a digital photo of a text document. When activated, this feature automatically decides what action to take depending on the input image type and applies the correction. Adjustments include removing noise from digital photos, deskewing, removing motion blur, straightening text lines, and correcting trapezium distortions. ● Detect page orientation Enable this feature to automatically detect the orientation of pages added to the FineReader document. ● Split dual pages Enable this feature when scanning a facing or opening dual pages. It will automatically split pages before adding them to the FineReader document. Note. The image preprocessing features are only available in the Edit Image dialog box to process the images opened in FineReader, and are not available while scanning or opening document pages. For details, see "Editing Images". ● The scanner interface to be used while scanning Selecting the Scanning Interface ABBYY FineReader can communicate with a scanner in the following ways: 1. Via the ABBYY FineReader interface. In this case, the ABBYY FineReader interface is used to set up scanning mode. The following settings are available: ● Resolution, Brightness, and Color Mode. ● Image preprocessing options: ● Detect page orientation. Enable this feature to automatically detect page orientation while scanning. ● Split dual pages. Enable this feature to automatically split dual pages into separate images. ● Enable image preprocessing. Enable this feature to perform automatic processing of scanned images. ● Multi–page document scanning options: ● Use the Automatic Document Feeder (ADF) ● Apply automatic duplex scanning (if supported by the scanner) ● Set the page scanning delay in seconds. Note. The Use ABBYY FineReader interface option may not be available for some scanner models. 2. Via a TWAIN interface or the scanner's WIA driver. In this case, scanning options are selected from the scanner driver's dialog box. Consult the technical documentation provided with the scanner for more information about the dialog box and its components. Important! Consult the scanner manual for proper setup. Make sure to install the software supplied with the scanner. The ABBYY FineReader scanning interface is used by default. To change the scanning interface: 1. Open the Options dialog box from the Scan/Open tab (Tools>Options…). 2. Set the toggle switch in the Scanner group to either: Use ABBYY FineReader interface or Use native interface. Tuning Brightness ABBYY FineReader will display a warning message during scanning if the brightness setting is incorrect. You may also need to adjust the brightness setting when scanning in black–and–white mode. To adjust the brightness: 1. Click the Scan button. 2. In the dialog box, specify the desired brightness. Depending on which scanning interface is being used, either the ABBYY FineReader scanning dialog box or the scanner driver dialog box will open. A medium value of around 50% should suffice in most cases. 3. Proceed to scan the document. If the resulting image contains too many "torn" or "glued" letters, troubleshoot using the table below. 20
ABBYY FineReader 10 User’s Guide Your image looks like this Recommendations This image is suitable for OCR. characters are "torn" or very light ● Lower the brightness to make the image darker. ● Scan in grayscale. Brightness will be tuned automatically. characters are distorted, glued together, or filled ● Increase the brightness to make the image brighter. ● Scan in grayscale. Brightness will be tuned automatically. Font is Too Small For optimal OCR results, scan documents printed in very small fonts at higher resolutions. 1. Click the Scan button. 2. In the dialog box, specify the desired resolution. Depending on which scanning interface is being used, either the ABBYY FineReader scanning dialog box or the scanner driver dialog box will open. 3. Proceed to scan the document. You may wish to compare the images of the same document obtained at different resolutions by opening them in the Zoom window in Pixel–to–Pixel mode (View>Zoom Window>Scale>Pixel–to–Pixel) Source image Recommended resolution 300 dpi for typical texts (printed in fonts of size 10pt or larger) 400–600 dpi for texts printed in smaller fonts (9pt or smaller) Adjusting Image Resolution The Image Resolution indicates how detailed the image is. Resolution is normally measured in dpi (dots per inch). The best resolution for OCR is 300 dpi. Important! For best OCR results, vertical and horizontal resolutions must be the same. Setting the resolution too high (over 600 dpi) increases the recognition time. Increasing the resolution does not yield substantially improved recognition results. Setting an extremely low resolution (less than 150 dpi) adversely affects OCR quality. You may need to adjust the resolution of your images if: ● The resolution of your image is less than 250 dpi or higher than 600 dpi. ● The resolution of your image is non–standard. For example, faxes may have a resolution of 204 x 96 dpi. To adjust the resolution: 1. Click the Scan button. 2. Depending on the scanning interface used, the ABBYY FineReader interface or the scanner driver interface will appear. Choose the desired resolution in the scanning dialog box. 3. Scan the document. Tip. Resolution corrections are also possible via the Edit Image dialog box (Page>Edit Page Image…). Scanning Facing Pages When scanning facing pages from a book, both pages will appear in a single image. See Sample Image. 21
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