WIA_IPS_CONTRAST

The WIA_IPS_CONTRAST property contains the current hardware contrast setting for a device.

Property Type: VT_I4

Valid Values: WIA_PROP_RANGE

Access Rights: Read/write

Remarks

An application sets the WIA_IPS_CONTRAST property to the hardware's contrast value. The WIA minidriver creates and maintains this property.

Values for WIA_IPS_CONTRAST should be mapped in a range from −1000 through 1000, where −1000 corresponds to the minimum contrast, 0 corresponds to normal contrast, and 1000 corresponds to the maximum contrast.

WIA_IPS_CONTRAST is required for all image acquisition items.

Requirements

Header

Wiadef.h (include Wiadef.h)

 

 

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