There is no API to constrain inserted image 😞 but it is not difficult to simplify logo insertion with iLogic .
The following external iLogic rule embeds specified logo (bmp-file) into the title block definition.  You may specify both position and image size. 
Coordinates should be defined
- in the base length units (cm) and
- in the sketch coordinate system.
Look at this video to see how the rule works:
https://chronicle.autodesk.com/Main/Details/73f9f5e2-014b-4928-931f-79f6a7c258d8
 
'This rule embeds Logo image into title block definition
'Image position and size are specified.
Sub Main
    'check if the active document is drawing document
    If Not TypeOf(ThisDoc.Document) Is DrawingDocument Then        
        MessageBox.Show("Run this rule when Drawings document is active", _
            "Logo", MessageBoxButtons.OK, MessageBoxIcon.Asterisk, _
            MessageBoxDefaultButton.Button1)
        Exit Sub
    End If
    
    '1) define full path to the Logo image
    Dim LogoFilename As String = "c:\Temp\RulerCorp.bmp"
    
    '2) specify Logo image size -  0.62in x 0.62in
    '   Use cantimeters! - Inventor internal units 
    Dim LogoHeight As Double = 0.62*2.54  'in cm
    Dim LogoWidth  As Double = LogoHeight 
    
    '3) specify insertion point coordinates  X = 7.75in, Y = 7.45in
    '   Use cantimeters! - Inventor internal units 
    '   Sketch coordinate system is used.
    Dim InsPointX As Double = 7.75*2.54  'in cm
    Dim InsPointY As Double = 7.45*2.54  'in cm
    
    '4) the final step - insert Logo
    InsertImage(LogoFilename,InsPointX,InsPointY, LogoWidth, LogoHeight)
    
    Beep 'could be removed 
End Sub
Sub InsertImage( _
        LogoFilename As String, _
        InsPointX    As Double, _
        InsPointY    As Double, _
        LogoWidth    As Double, _ 
        LogoHeight   As Double)
    
    Dim oDoc As DrawingDocument = ThisDoc.Document
    
    'set target point in the title block sketch coordinates (in cm)
    Dim oPoint As Point2d = ThisApplication.TransientGeometry _
        .CreatePoint2d(InsPointX, InsPointY)
    
    Dim oTitleBlockDef As TitleBlockDefinition _
            = oDoc.ActiveSheet.TitleBlock.Definition
    
    Dim oSketch As DrawingSketch
    Call oTitleBlockDef.Edit(oSketch)
    Dim oSketchImage As SketchImage 
    'add embedded image
    oSketchImage = oSketch.SketchImages.Add(LogoFilename, oPoint, False)
    'set image size in cm
    oSketchImage.Height = LogoHeight
    oSketchImage.Width  = LogoWidth        
    oTitleBlockDef.ExitEdit
    
End Sub  'InsertImage
 Cheers,
					
				
			
			
				
	
Vladimir Ananyev
Developer Technical Services
Autodesk Developer Network
