LightMeterLine Method
Syntax
CWMachineVision.LightMeterLine SourceImage, Line, LightMeterLineReport [, ShowSearchArea = True] [, CoordinateTransformation]
Return Type
On success, this method returns 0. On failure, this function returns a negative number.
Purpose
Measures the pixel intensities on a line of an image.
Remarks
Use this method with U8, I16, and SGL images.
Parameters
SourceImage As CWIMAQImage
The input image.
Line As CWIMAQLine
The line on the image on which to measure the intensities.
LightMeterLineReport As CWMVLightMeterLineReport
On return, a report containing information about the intensities on the selected line.
ShowSearchArea As Variant
[Optional] If True, the search line is overlaid on the image.
This parameter has a default value of True.
CoordinateTransformation As Variant
[Optional] A CWMVCoordinateTransformation object. If supplied, the input line is transformed using this parameter.
Example
Private Sub Run_Click()
'Inputs to LightMeterLine
Dim SearchArea As New CWIMAQLine
Dim Transformation As New CWMVCoordinateTransformation
'Outputs of LightMeterLine
Dim Report As New CWMVLightMeterLineReport
'Get the line from the viewer.
CWMachineVision1.GetSelectedLineFromViewer CWIMAQViewer1, SearchArea
'Measure the intensity inside the search region
CWMachineVision1.LightMeterLine CWIMAQViewer1.Image, SearchArea, Report, , Transformation
'Display the mean intensity in a text box
Text1.Text = Report.MeanIntensity
End Sub