Programmatically Creating measured lines from bounding box measurements from count/size

rdbunn · July 2013

The app IDs given image structures and returns dimensional info using Count/Size and bounding box metrics. The app displays the detected region and returns either the Box Height or Width depending on the measured structure. This works well. However, I would prefer to draw a single line that would represent the measured length as measured by the bounding box. I thought I could use the Count/Size Count Option, Longest Line feature. This worked but it is not constrained to the X or Y axis of the Bounding Box. I see the value of the current behavior but it would be nice to offer an X or Y constraint option, the line drawn would track the width or height axis of the box so to speak.

Given this, in order to programmatically draw the line I thought that I could acquire the bounding box upper left and lower right X/Y coordinates and draw an annotation line using this data relative to the bounding box width or height result. I found the GetBoundingBox Method that will return the point data needed to draw an anno line but this seems tied to manual Measurements as the documentation indicates and not available from a Count/Size measurement. How do I grab the bound box coordinates, is there a better method for annotating the measured dimension constrained to the X/Y of the box?

For clarity, I am using Premier 9.0.3.

YuriG · July 2013

Hi Rod,

Here is the macro that will draw bounding box with width/height and angle of the objects.

    Public Sub DrawWidthHeightBoxes()
        If ThisApplication.ActiveImage Is Nothing Then OpenDemoImage
        Dim image1 As McImage=ThisApplication.ActiveImage
        Dim md As McMMData=image1.MeasurementsData
        If md.Count=0 Then Exit Sub
        Dim pixelSize As Double=1
        If image1.SpatialCalibration IsNot Nothing Then
            pixelSize=image1.SpatialCalibration.PixelSizeX
        End If
        Dim ovl As MediaCy.IQL.Display.Overlays.McGraphOverlay=image1.AnnotationOverlay
        For Each sf As McMMSubFeature In md.SubFeatures
            If sf.FeatureType And McMMSubFeature.mcmmsfTypes.mcmmsfRegion = 0 Then Continue For
            'get size in pixels
            Dim width As Double =sf.Value(eMeasures.RgnWidth)/pixelSize
            Dim height As Double =sf.Value(eMeasures.RgnLength)/pixelSize
            Dim angle As Double=sf.Value(emeasures.RgnDirection)
            Dim center As System.Drawing.PointF
            center.X=sf.Value(eMeasures.RgnCentroidX)/pixelSize
            center.Y=sf.Value(eMeasures.RgnCentroidY)/pixelSize
            Dim box As MediaCy.IQL.Display.Overlays.McGraphObjRect= ovl.Add("McGraphObjRect")
            box.SetHandle(1,center.x-width/2,center.y-height/2)
            box.SetHandle(5,center.x+width/2,center.y+height/2)
            box.AngleOfRotation=angle+90
            box.NotifyCreationComplete
        Next
    End Sub

YuriG · July 2013

Hi Rod,

If you want to use low-level functions to draw bounding box, the Measurements module exposes this functionality. So you can get McFeatures object of any measurement element and all corresponded properties.

The macro below with draw bounding box in annotation overlay for every measurement feature on the active image (it will open a demo image if no image active):

Imports MediaCy.Addins.Measurements
Public Module Module1

    '
    'Draws bounding box around every measurement feature on active image
    '
    Public Sub DrawBoundingBoxes()
        If ThisApplication.ActiveImage Is Nothing Then OpenDemoImage
        Dim image1 As McImage=ThisApplication.ActiveImage
        Dim md As McMMData=image1.MeasurementsData
        If md.Count=0 Then Exit Sub
        Dim ovl As MediaCy.IQL.Display.Overlays.McGraphOverlay=image1.AnnotationOverlay
        For Each sf As McMMSubFeature In md.SubFeatures
            Dim bbox As Mediacy.IQL.ObjectManager.SINGLERECT=sf.GetFeatures.BoundingRect(sf.FeatureIndex)
            Dim box As MediaCy.IQL.Display.Overlays.McGraphObjRect= ovl.Add("McGraphObjRect")
            box.SetHandle(1,bbox.Left,bbox.Top)
            box.SetHandle(5,bbox.Right,bbox.Bottom)
            box.NotifyCreationComplete
        Next
    End Sub



    Public Function OpenDemoImage() As SimpleScript
        OpenDemoImage = New SimpleScript
        Dim docList1 = New List(1), doc1

        With Application.DocumentCommands.OpenImage(OpenDemoImage)
            .Filenames = New String() {ThisApplication.Path(mcPathType.mcptSampleImages) & "Count and Size\SPOTS.TIF"}
            .Run(docList1)
        End With

        With Application.DocumentCommands.Activate(OpenDemoImage)
            .Run(docList1(0), doc1)
        End With

        With Measure.MeasurementsCommands.Options(OpenDemoImage)
            .Segmentation.AutoFindPhase = MediaCy.IQL.Features.mcFindPhase.mcfpDarkest
            .Segmentation.SegmentationType = McMMOptions.mcmmSegmentationType.mcmmstThresholdSegmentation
            .Run(doc1)
        End With

        With Measure.MeasurementsCommands.ExecuteCount(OpenDemoImage)
            .Run(doc1)
        End With
    End Function

End Module

I've also attached the complete project.

Yuri

rdbunn · July 2013

Sorry for the confusion. Using count/size I have the bounding box measurement as a result of a detected object. I would like to draw an annotation line that represents either the width or height dimension of the bounding box that represents the measurement, either height or width.

rdbunn · July 2013

rdbunn said:

Thank you very much Yuri. However, the message is incomplete.

YuriG · July 2013

It should be complete now.

YuriG · July 2013

And here is the updated project with new sub.

rdbunn · July 2013

Yuri:

I added the Box sub to the original code and called. Works fine with your sample1. For testing purposes I added the draw box sub to my app and called after I have counted the objects. However, when I attempt to load my app I receive" type identifier is invalid" and is referencing McMMSubFeature. It thought I had not included all the references required. I compared the working app with mine and all was the same. I am overlooking something simple I suspect. Any thoughts?

rdbunn · July 2013

Never mind, I found the problem!

Programmatically Creating measured lines from bounding box measurements from count/size

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