How can I use the same ROI on multiple images?

johnb

I have a need to create a calibrated circle of a known diameter, and apply it to multiple images.  However, ROIs are specific to individual images and none of these images have the same dimensions.  If I do attempt to apply an ROI to an image other than the one in which it was created, it will be truncated.  How can I draw a circular ROI and save it for future use with all of my images?  Parenthetically, I note there is a feature for rectangles where the user can specify a fixed size.  it would be useful to add that for circles/ellipses in future releases.

Thanks!

PierreD

Hello,

One way to accomplish this would be to use a macro. Here is a very basic one that will prompt for the calibrated circle center and diameter and create a ROI accordingly.

Pierre

    Public Sub CreateCircularRoi()
        Dim image As McImage
        Dim circleValues(3) As Single

        With Application.DocumentCommands.ActiveImage(Nothing)
            .Run(image)
        End With

        Try
            Dim circleString As String = InputBox("Enter circle center and diameter:","ROI Creation","100 100 50")
            Dim values = circleString.Split(New String() {" "}, System.StringSplitOptions.RemoveEmptyEntries)
            circleValues(0) = values(0)
            circleValues(1) = values(1)
            circleValues(2) = values(2)
            circleValues(3) = values(2)
            image.SpatialCalibration.UnCalibrateFloatPoints(circleValues)
        Catch
            Exit Sub
        End Try

        With Select.RoiCommands.Add(Nothing)
            .Points = New System.Collections.Generic.List(Of System.Drawing.PointF)
            .Points.Add(New System.Drawing.PointF(circleValues(0),circleValues(1)))
            .Points.Add(New System.Drawing.PointF(circleValues(2),circleValues(2)))
            .ROIType = Features.ROI.ROITypes.Circle
            .Run(image)
        End With
    End Sub

johnb

I was hoping not to have to resort to a macro!  Thanks for the response; I do appreciate it!