This method increases (or decreases) the RGB values of a raster image.

[Visual Basic] Public Function RGBLevel(red As Integer, green As Integer, blue As Integer) As Boolean
[C#] public bool RGBLevel(int red, int green, int blue);

Parameters

red
   Sets the shift in the red component of the RGB value (from -255 to 255)

green
   Sets the shift in the green component of the RGB value (from -255 to 255)

blue
   Sets the shift in the blue component of the RGB value (from -255 to 255)

Return Value

Returns True if successful. Returns False if unsuccessful.

Explanation

The RGBLevel method increases or decreases the RGB values in a raster image. As the values of the Red, Green, or Blue parameters increase, the image becomes brighter. As those values decrease, the image becomes darker. If the Red, Green, or Blue parameters are 0, the image is not altered.

To execute the RGBLevel method, set the image handle of the image in the Image property or the Layer(LayerNumber).Image property. The RGBLevel method supports 1, 4, 8, 16, 24, and 32 bit images.

Before executing the RGBLevel method, you must set the area on the image that will be affected. There are 4 ways to do this.

  1. To use a mask image, set the SelectMode property to EffectMask. Set the mask image handle in the SourceMask property
  2. To process the total image, set the SelectMode property to EffectAll
  3. To process the polygonal area on the image, set the SelectMode property to EffectPolygon. Select the polygon by setting the appropriate coordinate values for the points of the polygon in the Point property
  4. To process an elliptical area on the image, set the SelectMode property to EffectEllipse. Select the ellipse by setting the appropriate values for the bounding rectangle in the Rect property

When the SelectMode property is set to EffectPolygon or EffectEllipse, the appropriate values must be set in the Inside property. When a 1, 4, or 8 bit image is processed, the total image will be processed regardless of the value set in the SelectMode property.

If the RGBLevel method is successful and the DestinationAsImageKitImage property is True, the resulting image will be set in the Image property or in the Layer(LayerNumber).Image property, according to the value set in the LayerNumber property.

If the RGBLevel method is successful and the DestinationAsImageKitImage property is False, the resulting image will be set in the DestinationImage property.

See Also

ImageKit.Effect Members | Newtone.ImageKit.Wpf.ImageKit

The ImageKit WPF is created by Newtone Corporation