This method creates a motion blur effect on a raster image.
Public Function MotionBlur(mode As Integer, length As Integer, angle As Integer) As Boolean
public bool MotionBlur(int mode, int length, int angle);
Parameters
mode
Sets the type of blur (0: Linear, 1:
Radial, 2: Zoom)
length
Sets the length of the blur (from 0
to 255)
angle
Sets the angle of the blur (in
degrees from 0 to 360)
Return Value
Returns True if successful. Returns False if unsuccessful.
Explanation
The MotionBlur method creates a motion blur effect on a raster image. The Mode parameter determines the type of motion blur.
Mode=0 (Linear blur)
This motion blur simulates the image shifting. The Length parameter
sets the magnitude of the shift. The Angle parameter determines the
direction of the shift. The major directions of the Angle parameter
are as follows: Angle=0 -> a shift to the left; Angle= 90
-> a shift down; Angle= 180 -> a shift to the right; Angle=
270-> a shift up.
Mode=1 (Radial blur)
This motion blur simulates the image spinning by the number of
degrees set in the Angle parameter. The Length parameter is
ineffective.
Mode=2 (Zoom blur)
This motion blur simulates the image zooming in by the length set
in the Length parameter. The Angle parameter is ineffective.
To execute the MotionBlur method, set the image handle of
the image in the SourceImage
property. The MotionBlur method supports 8 bit grayscale,
16, 24, and 32 bit images.
Before executing the MotionBlur 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 EffectMask. Set the mask image handle in the SourceMask property
- To process the total image, set the SelectMode property to EffectAll
- 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
- 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.
If successful the resulting raster image data is set in the DestinationImage property.