TargetVariance Property

Gets and sets the largest allowable variance in brightness across the image.

Syntax

Visual Basic
C#
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Property TargetVariance As Byte

'Usage
 
Dim instance As BrightnessContrastOptions
Dim value As Byte
 
instance.TargetVariance = value
 
value = instance.TargetVariance

public byte TargetVariance {get; set;}

public: __property byte get_TargetVariance();
public: __property void set_TargetVariance( 
   byte value
);

public:
property byte TargetVariance {
   byte get();
   void set (    byte value);
}

Remarks

The default value is 25.

Valid values are 0 to 255.

This value sets the allowable amount of change in the background color across an image. An example of this would be a book page scanned on a flatbed scanner, where one edge was darker than the rest due to the greater distances from the scanner bed. This image would have a relatively high background variance. The algorithm will suggest the adaptive correction method for images that exceed the allowable background variance.

Reference

BrightnessContrastOptions Class
BrightnessContrastOptions Members