LightMeterRectangle Method
Syntax
CWMachineVision.LightMeterRectangle SourceImage, RotatedRectangle, LightMeterRectangleReport [, ShowSearchArea = True] [, CoordinateTransformation]
Return Type
On success, this method returns 0. On failure, this function returns a negative number.
Purpose
Calculates statistics about the pixel intensities inside a rectangular region of an image.
Remarks
Use this method with U8, I16, and SGL images.
Parameters
SourceImage As CWIMAQImage
The input image.
RotatedRectangle As CWIMAQRotatedRectangle
The region of the image in which to measure the intensities.
LightMeterRectangleReport As CWMVLightMeterRectangleReport
On return, a report containing information about the intensities in the selected region.
ShowSearchArea As Boolean
[Optional] If True, the search area is overlaid on the image.
This parameter has a default value of True.
CoordinateTransformation As Variant
[Optional] A CWMVCoordinateTransformation object. If supplied, the input search area is transformed using this parameter.
Example
Private Sub Run_Click()
'Inputs to LightMeterRectangle
Dim SearchArea As New CWIMAQRotatedRectangle
Dim Transformation As New CWMVCoordinateTransformation
'Outputs of LightMeterRectangle
Dim Report As New CWMVLightMeterRectangleReport
'Get the rotated rectangle from the viewer. If there is no region selected, the entire image
'will be processed
CWMachineVision1.GetSelectedRotatedRectFromViewer CWIMAQViewer1, SearchArea, False
'Measure the intensity inside the search region
CWMachineVision1.LightMeterRectangle CWIMAQViewer1.Image, SearchArea, Report, , Transformation
'Display the mean intensity in a text box
Text1.Text = Report.MeanIntensity
End Sub
Light Meter Example