This method reduces the image noise in raster images.
Parameters
Name | Explanation |
---|---|
Points | An array of x and y coordinate values defining
points of a polygonal area on the image. (in pixels) In C++Builder, the size of the Points array is given by Points_Size - 1 |
Mode | Sets the mode of noise reduction. (0: Median luminance method, 1:Noise reduction for each RGB plane). The following constants, vikRemoveNoiseGray = 0, vikRemoveNoiseRGB = 1, may also be used. |
Level | Sets the level of noise reduction for the RGB mode (from 0 to 255, effective when Mode is 1) |
Return Value
Returns True if successful, otherwise returns False.
Explanation
The RemoveNoise method reduces the image noise in raster images. When Mode is 1, the value of the level is enabled. As the Level parameter value increases the level of noise decreases.
To execute the RemoveNoise method, set the image handle of the image in the ImageHandle property or the Layer(LayerNo).ImageHandle property. The RemoveNoise method supports 8 bit grayscale, 16, 24, and 32 bit images.
Before executing the RemoveNoise method, you must set the area on the image that will be affected. There are 4 ways to do this.
- To use a mask image, set the SelectMode property to vikEffectMask. Set the mask image handle in the MaskImageHandle property
- To process the total image, set the SelectMode property to vikEffectAll.
- To process the polygonal area on the image, set the SelectMode property to vikEffectPolygon. Select the polygon by setting the appropriate coordinate values for the points of the polygon in the Points array. The number of points defining the polygon must be 3 or more.
- To process an elliptical area on the image, set the SelectMode property to vikEffectEllipse. Select the ellipse by setting the appropriate values for the bounding rectangle in the RectLeft, RectTop, RectRight, and RectBottom properties
When the SelectMode property is set to vikEffectPolygon or vikEffectEllipse, the InOut property should be set. When the SelectMode property is set to values other than vikEffectPolygon, please set the Points parameter to a dummy array or to NULL.
If successful the resulting raster image data is set in the LayerNo property (the ImageHandle property or the Layer(LayerNo).ImageHandle property. If unsuccessful, 0 is returned.
When the Caption, Message, and ButtonName properties are blank, the progress dialog box will not be displayed. When the progress dialog box is displayed, the percentage that the processing has completed will be shown in the dialog box.
Differences from the ImageKit 7/8/9/10 ActiveX
The parameters x, y have been changed to type TPoint
In Delphi, it is not necessary to pass the size of the array of x,
y points.