Contrast Property

Description

Returns or sets the contrast values available within the Source. This is a runtime property.

ActiveX Edition	Plug-in Edition	Mac Edition
Since V3.0	Since V3.0	Since V6.4

Data type

float

Syntax

ObjectName. Contrast

Remarks

Using this property after calling OpenSource() method and before calling AcquireImage().

When an error occurs and IfThrowException property is TRUE, an exception will be thrown. Check ErrorCode property and ErrorString property for error information.

See also

ContrastMinValue property, ContrastMaxValue property, ContrastStepDelta property, ContrastDefaultValue property, IfAutoContrast property.

Sample

A JavaScript sample is provided.

<script language="javascript">

	function btnManageContrast_onclick() {

            Webcam.OpenSource(); 

            Contrast = Webcam.Contrast;	//get the contrast value
            ContrastMinValue = Webcam.ContrastMinValue;//get the minimum contrast value
            ContrastMaxValue = Webcam.ContrastMaxValue;//get the maximum contrast value
            ContrastDefaultValue = Webcam.ContrastDefaultValue;//get the default contrast value
            ContrastStepDelta = Webcam.ContrastStepDelta;//get the contrast step delta
	
            Webcam.Contrast = 1;//change the contrast value to 1
            Contrast = Webcam.Contrast;	//get the contrast value

	}

</script>