A few scanning tips

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Pagis Pro Scanning

Click the Inbox scanner on the toolbar, and the scanner dialog screen comes up. You can set scan options, mode, resolution and such, and Preview and Scan. The preview shows the scanner bed and you can mark a desired area on it in the regular way. Manual preview is not really necesary in many cases, the automatic crop option works well for whole documents.


Notice that one mode option is FORMS, shown in more detail on the next page.


CONFIGURATION

Under the SCANNER button above will be a listing of your TWAIN or ISIS drivers. You select a driver there, scanner or camera, whatever you have. This does elaborate testing of your scanner in several modes.

There are TWO MAJOR MODES.   You can select to use either the PAGIS user interface, or your normal scanner's user interface.

Using your scanners user interface (like Microtek ScanWizard or Umax Vistascan) has pros and cons for documents. You can use the scanners Descreen filter to remove moire for example, and can use the histogram histogram to correct image contrast for important images, but this gives up some of the Pagis ability to seperate text and images into separate layers of the XIF file.

Your scanners user interface mode makes one regular scan. You can use all the tools available there, descreen, Unsharp Mask, histogram, but you get one image from it. That one image is processed by the Pagis enhancing options below, and it will split the text into another layer, but it did not start from a Line art scan.

Conversely, the Pagis user interface mode is very far from a a simple scan operation. It first makes a preliminary scan pass in Gray or Color mode (if specified) to detect where the image areas and text areas are, and to get them. Then Pagis rescans a second time (very quick) to get the text areas in Line art mode. The text background tint is kept separate too, and the image color layer. These four multiple images will be maintained separately in the most optimum mode for each. This will be invisible to you, it will appear as one image, but instead has optimized parts. While the status bar shows progress of several optimizing operations that are happening, most are too fast to really notice. However, the Pagis user interface does not include Descreen for moire.


This next Scanner tab screen appears only in Pagis interface mode. It does not appear if you have selected your scanners user interface, and then you would use your scanners settings in the normal way instead.


Typically the text portions are scanned at 300 dpi Line art mode and the image portions are scanned at 100 dpi Gray or Color modes. This dual resolution mode is for XIF files of course.

This is a general purpose scan utility, including Preview and Scan buttons for Color or B&W images. This screen is reached from the scan Property Button. The default options and selectable choices and defaults are dependent on the mode you selected on the previous screen at the top of this page (magazine, letter, photograph, etc). Resolutions are selectable as 100, 200, 300 or 400 dpi.


This Property tab appears for either mode, Pagis or your scanners user interface.

This is the scan Property Button - Page Refinements tab. This screen is the same in all modes, Scan, Copy, Fax, but the default options vary.

Below is a sample of the Pagis help file, showing details of this screen.

Scanner Properties - Page Refinements Tab

When you click on the Page Refinements Tab from the Scan Tool dialog box you can choose refinements for the whole page or for specific elements on the page as follows:

Page

Auto Straighten - After scanning, detects whether the page is tilted, and straightens it if necessary.

Auto Orient - After scanning, detects whether the page image is improperly oriented (turned 90 degrees). If so, orients it correctly. Note that if a page is upside down, Auto Orient will not correct it. However, once the page is inside of a XIF file, you can edit the file in the Pagis Editor, and correctly orient the page yourself

Auto Crop - After scanning, detects whether the page image has an image area surrounded by white space (margins. If so, automatically crops the image (removes the surrounding white space).

Text

Remove Dots - Analyzes the scanned image to see if it has 'noise' (unwanted spots), and if so, removes them.

Remove Lines - Analyzes the page image to see if it has horizontal and vertical lines, as on forms, and if so, removes them.

Remove Shading - Analyzes the page image to see if the image area is printed on a tinted background, and if so, removes it.

Pictures

Auto Image Enhance - Performs a number of corrections and improvements to the selected image, including color balancing and automatic contrast and brightness changes.

Text and
Pictures

Make Text Black - Analyzes the page image for any text that is not black, and if found, converts it to black.

Remove Background Tint - Analyzes the page image for background pattern and color, and if found, converts the background to white.

Separate Pictures from Background - Analyzes the page image to detect pictures. If pictures are detected, they are retained as separate images in the XIF file.

Remove Bleed Through - Analyzes the page image for shadows of images that show through from the back of a double-sided page. If found, the shadows are removed.


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