Sharp (ImageKit Control/ Effect Method)

This method modifies sharpness in a raster image.

[C++Builder] [ bool = ]imagekitcontrolname->Effect->Sharp(const TPoint * Points, const int Points_Size, short Level)

[C++Builder] [ bool = ]imagekitcontrolname->Effect->Sharp(short Level)

[Delphi] [ Boolean = ]imagekitcontrolname.Effect.Sharp(const Points: array of TPoint; Level: Smallint)

[Delphi] [ Boolean = ]imagekitcontrolname.Effect.Sharp(Level: Smallint)

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
Level	Sets the degree of sharpness (from 0 to 100, sharpness increases as the level increases)

Return Value

Returns True if successful, otherwise returns False.

Explanation

The Sharp method modifies the sharpness of a raster image. As the Level parameter value increase the sharpness increases and the image becomes clearer.

To execute the Sharp method, set the image handle of the image in the ImageHandle property or the Layer(LayerNo).ImageHandle property. The Sharp method supports 8 bit grayscale, 16, 24, and 32 bit images.

Before executing the Sharp 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.

When a 1, 4, or 8 bit image is processed, the SelectMode property must be set to process the total image (i.e. SelectMode= 1). 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.