Capture Device

Provides connectivity and control for hardware capture devices, such as ISIS or TWAIN document scanners, within Grooper.

Remarks

Overview

A Capture Device represents a physical or virtual scanner that can be used to acquire images of documents for processing in Grooper. Capture Devices are the bridge between Grooper and the underlying scanning hardware, abstracting device-specific details and exposing a consistent interface for configuration and operation.

• Each Scanner Profile is associated with a specific Capture Device, selected at the time the profile is created or edited in the Scan View.
• Supported device types include ISIS and TWAIN scanners, with device-specific implementations such as ISIS Device and TWAIN Device.
• The Capture Device manages device initialization, scan operations, error handling, and event notification for acquired pages and scan conditions.

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Configuration and Usage

• Select the desired Capture Device when configuring a Scanner Profile to control which hardware is used for scanning.
• Configure device-specific options, such as the 'Scan Area', to match the requirements of your documents and scanning workflow.
• Use the Scan View to interactively scan documents, monitor device status, and respond to scan events (such as paper jams or double feeds).

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Events and Error Handling

• The Capture Device raises events when pages are acquired or when scan conditions (such as errors or out-of-paper) occur.
• Error information is available via the 'GetLastError' method and is surfaced in the Grooper UI for operator awareness.

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Best Practices

• Choose the correct Capture Device type for your hardware (ISIS or TWAIN).
• Test device configuration and scan settings using the Scan View before deploying to production.
• Use the 'Scan Area' property to limit scanning to the relevant region of each page, improving performance and image quality.

For more information, see the documentation for Scanner Profile, Scan View, ISIS Device, and TWAIN Device.

Properties

Name	Type		Description
Scan Area	Logical Rectangle	►	Specifies the region of the page to be scanned, in logical units. ConverterSimple Rectangle Converter The 'Scan Area' property defines the rectangular area on each page that will be captured by the Capture Device. Configure this property to match the size and position of your documents within the scanner. Units can be specified in inches, points, millimeters, centimeters, or as a percentage of the page size (<in>, <pt>, <mm>, <cm>, <%>). Limiting the scan area can improve performance and reduce file size by excluding blank margins or irrelevant regions. The default value is typically the full page area, but can be adjusted for custom document sizes or to avoid scanning artifacts at the edges. > This property is only visible for devices recognized as scanners.

Derived Types

There are 4 implementations of Capture Device.

ColorTrac Scanner	Provides connectivity and configuration for ColorTrac large format scanners within Grooper.
Import Device	Implements a virtual scanner by importing images from a file system directory or ZIP file.
ISIS Device	Provides connectivity to document scanners using the ISIS protocol.
TWAIN Device	Provides connectivity and control for document scanners using the TWAIN protocol.

See Also

Logical Rectangle

Used By

Scanner ProfileCapture Settings