Reading raster image DPI while importing

Hi All,

Creating a simple script to import a graphic into an anchored frame document. All is working fine, but I cant find a way to read the DPI from the raster image so I can modify the now hard-coded value on lines 10-11.

I found: Constants.FS_InsetRasterDpi, but this seems to be for SVG data.

I assume it has something to do with the Imported Graphic Scaling dialog (see image below).

Any ideas?

Thanks in advance.

    if(myFrame != null){
        //only proceed if valid frame
        var props = new PropVals();
        var strFilename = "";
        props = GetImportDefaultParams();
        var index = GetPropIndex(props, Constants.FS_HowToImport);
        if(index > -1) props[index].propVal.ival = Constants.FV_DoByRef; //import by Reference
        index = GetPropIndex(props, Constants.FS_FitGraphicInSelectedRect); //Do not fit
        if(index > -1) props[index].propVal.ival = false;
        index = GetPropIndex(props, Constants.FS_GraphicDpi); //96 DPI
        if(index > -1) props[index].propVal.ival = 96; 
        index = GetPropIndex(props, Constants.FS_ShowBrowser); //ShowBrowser to get file
        if(index > -1) props[index].propVal.ival = 1;
    }

later...

oDoc.Import(oDoc.TextSelection, path, props, returnParms);