VintaSoft Twain .NET SDK 15.4: Documentation for Web developer
Vintasoft.Twain Namespace / WebTwainDeviceJS type / get_Contrast Property
Syntax Exceptions Remarks BrowserCompatibility SeeAlso
In This Topic
get_Contrast Method
In This Topic
Gets contrast of gray/palette/color images for current scan session for TWAIN/WIA/SANE/eSCL device.
Syntax
var instance = new Vintasoft.Twain.WebTwainDeviceJS(deviceName, productFamily, manufacturer, driverVersion, twainVersion, deviceManager, is64Bit);

var value; // Type: number
value = instance.get_Contrast();

Return Value

Contrast of gray/palette/color images for current scan session.
Exceptions
ExceptionDescription
Thrown if device is not opened OR error occurs during getting value of device capability.
Remarks

This property sends a synchronous request to get value of WebTwainDeviceCapabilityIdEnumJS.IContrast capability. If you want to use asynchronous request instead of synchronous request, please get information about WebTwainDeviceCapabilityIdEnumJS.IContrast capability using WebTwainDeviceJS.getCapabilityAsync or WebTwainDeviceJS.getCapabilitiesAsync function.

Browser Compatibility
9
See Also

Reference

WebTwainDeviceJS Class
WebTwainDeviceJS Members

 

 

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