AutoThreshold2 Method
Syntax
CWIMAQVision.AutoThreshold2 SourceImage, DestImage, NumberOfClasses [, Method] [, MultiThresholdData] [, MaskImage]
Return Type
On success, this method returns 0. On failure, this method returns a negative number.
Purpose
Automatically thresholds an image into multiple classes.
Remarks
Use this method with U8 images.
Parameters
SourceImage As CWIMAQImage
The image to process.
DestImage As CWIMAQImage
The resulting U8 image.
NumberOfClasses As Long
The number of classes into which to threshold the image. Valid values range from 2 to 256.
Method As Variant
[Optional] A CWIMAQAutoThresholdMethods value that specifies the threshold method to use if NumberOfClasses is 2. The method ignores this parameter if NumberOfClasses is not 2.
MultiThresholdData As Variant
[Optional] On return, a CWIMAQMultiThresholdData object containing NumClasses elements that is compatible with CWIMAQVision.MultiThreshold2.
MaskImage As Variant
[Optional] A CWIMAQImage object that specifies the region in which the method computes the MultiThresholdData. The method processes only those pixels in the image whose corresponding pixels in the mask are non-zero. Do not set this parameter if you want to calculate the MultiThresholdData for the entire image.
Example
Dim i As New CWIMAQImage
Dim thresholdData As New CWIMAQMultiThresholdData
'AutoThreshold2 the image in Viewer1 into 3 classes and store the
'result in i
CWIMAQVision1.AutoThreshold2 CWIMAQViewer1.Image, i, 3, _
cwimaqATMethodCluster, _
thresholdData
'Use thresholdData result to MultiThreshold the Viewer inplace
CWIMAQVision1.MultiThreshold2 CWIMAQViewer1.Image, _
CWIMAQViewer1.Image, _
thresholdData