RemoveNoise (ImageKit Control/ Effect Method)

This method reduces the image noise in raster images.

[Visual Basic] [ Boolean = ]imagekitcontrolname.Effect.RemoveNoise(x As Long, y As Long, Points As Long, Mode As RemoveNoiseModeConstants, Level As Integer)

[Visual C++] [ BOOL = ]imagekitcontrolname.GetEffect().RemoveNoise(long *x, long *y, long Points, long Mode, short Level)

[VB.NET] [ Boolean = ]imagekitcontrolname.Effect.RemoveNoise(ByRef x As Integer, ByRef y As Integer, Points As Integer, Mode As ImageKit10(A)Lib.RemoveNoiseModeConstants, Level As Integer)

[C#.NET] [ bool = ]imagekitcontrolname.Effect.RemoveNoise(ref int x, ref int y, int Points, ImageKit10(A)Lib.RemoveNoiseModeConstants Mode, int Level)

ImageKit10ALib refers to the ANSI version, ImageKit10Lib refers to the Unicode version.

Parameters

Name	Explanation
x	An array of x coordinate values defining points of a polygonal area on the image. (in pixels) * (see Note below)
y	An array of y coordinate values defining points of a polygonal area on the image. (in pixels) * (see Note below)
Points	The number of points defining the polygonal area on the image.
Mode	Sets the mode of noise reduction. (0: Median luminance method, 1:Noise reduction for each RGB plane). The following constants, ikRemoveNoiseGray = 0, ikRemoveNoiseRGB = 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)
* NOTE for retrieving array values: In Visual Basic, if the array is defined as Dim x(0 To 2) As Long, then the arguments are returned in x(0). In Visual C++, pass the pointer to the first element in the array. In VB.NET, the arguments are returned in x(0). In C#.NET, the arguments are returned in x[0].

Return Value

Returns True (nonzero) if successful, otherwise returns False (0).

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 0. Set the mask image handle in the MaskImageHandle property
To process the total image, set the SelectMode property to 1
To process the polygonal area on the image, set the SelectMode property to 2. Select the polygon by setting the appropriate coordinate values for the points of the polygon in two arrays, one array for the x coordinate values and one array for the y coordinate values. The pass these arrays to the x and y arguments of the RemoveNoise method. 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 3. 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 values other than 2 (ikEffectPolygon), please set dummy arrays in the x and y parameters and set the Points parameter to 0.
When the SelectMode property is set to 2 or 3, the appropriate value must be set in the InOut property. 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.

For scripting languages and other programs that require variant types, or when using VB.NET or C#.NET in 64 bit builds, please refer to the RemoveNoiseVariant method.

Differences between ImageKit7/8

The Mode argument type has changed.