This method sets a digital watermark image or digital watermark text into a raster image.
Public Function SetSecretImage(sourceImage As Image, maskImage As Image, text As String, font As Font, rect As Rectangle, level As Long) As Boolean
public bool SetSecretImage(Image sourceImage, Image maskImage, String text, Font font, Rectangle rect, int level);
Parameters
sourceImage
The image handle of the original
image (24 bit color images only) The watermark will be set on this
image
maskImage
The image handle of the digital
watermark (1 bit color image)
text
Sets the digital watermark text (the
length of text can be up to 127 bytes)
font
Sets the font
rect
The coordinates of the rectangle
where the text is to be attached to sourceImage (in pixels)
level
Sets the level of "detection" for the
watermark (-20 to 20)
Return Value
Returns True if successful. Returns False if unsuccessful.
Explanation
The SetSecretImage method sets a digital watermark into a raster image. It can set either a 1 bit color image or text as the watermark. The value of the Level parameter determines how "detectable" the digitable watermark will be. As the Level parameter increases in a positive direction, the digital watermark becomes brighter. As it increases in a negative direction, the digital watermark becomes darker.
If the maskImage parameter is set, the image referred to by the maskImage parameter will be set as the digital watermark. In this case the top left corner of the maskImage will be attached to the sourceImage at the coordinate location determined by the Rect parameter. If the maskImage parameter is 0, then the Text set in the Text parameter will be used as the digital watermark. It will be placed within a rectangular area on the sourceImage as determined by the Rect parameter.
If successful the resulting raster image handle is set in the DestinationImage property. The resulting image will be a 24 bit image.