set_Contrast Method

In This Topic

Sets contrast of gray/palette/color images for current scan session.

Syntax

Javascript (Usage)
Javascript (Specification)

var instance = new Vintasoft.Twain.WebTwainDeviceJS(deviceName, productFamily, manufacturer, driverVersion, twainVersion, deviceManager, is64Bit);

var returnValue; // Type: any

// Parameters
var value; // Type: number

returnValue = instance.set_Contrast(value);

function set_Contrast(
   valueThe contrast of gray/palette/color images for current scan session.
 : number
) : any;

Parameters

value: The contrast of gray/palette/color images for current scan session.

Exceptions

Exception	Description
	Thrown if device is not opened OR error occurs during setting value of device capability.

Remarks

This property sends a synchronous request to set value of WebDeviceCapabilityIdEnumJS.IContrast capability. If you want to use asynchronous request instead of synchronous request, please set value of WebDeviceCapabilityIdEnumJS.IContrast capability using WebTwainDeviceJS.setCapabilityAsync or WebTwainDeviceJS.setCapabilitiesAsync function.

Browser Compatibility

Reference

WebTwainDeviceJS Class
WebTwainDeviceJS Members

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