TwainGetGamma Method (GdPictureImaging)

In This Topic

Asks to the opened source for current Gamma correction value to apply to the scanned image.

Syntax

'Declaration
 
Public Function TwainGetGamma() As Double

public double TwainGetGamma()

public function TwainGetGamma(): Double;

public function TwainGetGamma() : double;

public: double TwainGetGamma();

public:
double TwainGetGamma();

Gamma correction value for the image data.

Remarks

Before using this method check that the TWAIN state is TWAIN_SOURCE_OPEN (4) To get the TWAIN state, use the TwainGetState() method.