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Due to the wide range of imaging devices, the first time you utilize an Umax scanner, you will be prompted to enter its Twain Device Configuration settings. These settings are utilized by XrayVision to allow the application to adapt to the capabilities of a particular imaging device.
The recommended configuration settings for the Umax scanners are outlined in the following table. While you are free to select any values for these settings, the following values have been found to work best with the Umax line of scanners.
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Recommended Settings |
Description | |
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Twain AutoDetect Sensitivity |
These settings indicate how noisy the scanner?s background appears. Noise can include dust, scratches and color inconsistencies with the flatbed or the scanner cover. These settings help the auto-acquire algorithms to determine what is image data and what is not. | |
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Sensitivity |
Normal Sensitivity |
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Sensitivity Factor |
Medium |
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Valid Image Transfer Methods |
The image transfer settings indicate the various methods by which the imaging device can transfer captured images back to an application. | |
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Native |
Enabled |
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Memory |
Enabled |
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File |
Enabled |
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Border Handling |
The border handling settings let the application know about possible noise, color deviation or borders that may appear when scanning an image. | |
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Ignore Border |
Ignore small border |
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Transparency Handling |
The transparency settings let the application know about extra templates that may appear in scanned images. | |
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Uses a template |
Disabled |
Indicates whether a template is placed on the flatbed of the scanner when scanning transparencies. Umax devices do NOT use templates. |
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Dual Scan Delay |
Indicates an amount of time to wait between automatically acquire scans. This delay should be used for scanners that have reentrancy problems with their device drivers. | |
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Between scans wait ... |
20 |
Some Umax scanners require a delay in between scans or you could possibly freeze the scanner and/or system. This delay is required while the scanner returns its scan head to the ready position. |
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General Options |
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Allow automatic acquires |
Enabled |
Indicates that the imaging device supports automatic acquisition. |
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Allow Measurement Nudging |
Disabled |
Indicates that fractional adjustments can be specified to the imaging device. |
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Compensate for dust and scratches |
Enabled |
Indicates that auto-detection of images should take into consideration the removal of dust and scratches while determining the placement of an image on the imaging device. |
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Automatically apply brightness/contrast |
Enabled |
Indicates that brightness/contrast adjustment is handled by XVa3 and is not automatically applied by the imaging device when images are automatically acquired by the application. |
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Always scan as fast as possible |
Disabled |
Umax scanners do not support this option. |
A TWAIN device?s settings can be modified any time by selecting the Twain Device Configurations ? option from the Tools menu. To modify a specific TWAIN configuration either double click on the entry with your left mouse button or select the configuration by clicking on it once with your left mouse button and then click on the Edit Configuration button.
One of the new features in the XVa3 application is the ability to automatically acquire images from TWAIN imaging devices. The XVa3 application utilizes the settings discussed in the previous section in order to automatically capture images from the imaging device without having to display the imaging device?s interface or require user interaction.
Each of the various capture tabs in XVa3 offer you ability to select the Automatically Acquire feature. If you choose to not select the automatic acquire feature, then you will be provided with the default imaging device?s interface.
If you decide to not use the Automatically Acquire feature when capturing images from a Umax scanner, the Vista Scan application will be displayed. The Vista Scan application is Umax?s default imaging interface for acquiring images from their scanners. The discussion in this documentation of the Vista Scan interface will be general and tailored toward scanning x-rays. For detailed information about the Vista Scan application, please refer to the Vista Scan product documentation.
The Vista Scan interface is comprised of a single dialog window that is organized by: the scanning controls; the image preview and image selection area.
Images are captured by:
Selecting an image type.
Selecting the media type.
Selecting the resolution.
Previewing the image by clicking on the Preview button.
Selecting the desired portion of an image.
Clicking on the Scan button.
One of the most important aspects of scanning using Vista Scan is the selection of the image or the portion of the image that should be scanned. Image selection is done using an image selection box in the image display and selection window. The selected portion of an image will be indicated by a box that appears around part or all of an image (referred to as an image selection box). The image selection box may be dragged or resized using your left mouse button. To drag the image selection box, simply move the mouse cursor to the interior of the box (the cursor will change to a four headed arrow) and click and drag with the left mouse button. To resize the box, move the cursor over the corner or side of the box (the cursor will change to a two headed arrow) and then click and drag with the left mouse button.
