.net - Extract Microsoft photo XMP person tags with metadata-extractor-dotnet

Question

I'm trying to read the Microsoft photo XMP person tags (name & rectangle) from JEPG files using metadata-extractor-dotnet with C#. Until now, I've only managed to extract the person name using kind of hacky code. I'd like to know if there is a cleaner way to do it.

Background 1: I'm trying to read these XMP metadata values: https://exiftool.org/TagNames/Microsoft.html -> Microsoft MP Tags -> RegionPersonDisplayName & RegionRectangle

Background 2: when iterating over the XML values in the JPEG with metadata-extractor-dotnet (xmpDirectory.XmpMeta.Properties), I see the following values:

• Path=MP:RegionInfo, Value='', namespace=http://ns.microsoft.com/photo/1.2/
• Path=MP:RegionInfo/MPRI:Regions, Value='', namespace=http://ns.microsoft.com/photo/1.2/t/RegionInfo#
• Path=MP:RegionInfo/MPRI:Regions[1], Value='', namespace=''
• Path=MP:RegionInfo/MPRI:Regions[1]/MPReg:Rectangle, Value=0.297101, 0.283765, 0.164855, 0.248295, namespace: http://ns.microsoft.com/photo/1.2/t/Region#
• Path=MP:RegionInfo/MPRI:Regions[1]/MPReg:PersonDisplayName, Value='Peter Mueller',namespace=http://ns.microsoft.com/photo/1.2/t/Region#

My hacky code that works and extracts the person names looks like this:

var array1 = GetXmpArrayOrNull(XmpDirectory?.XmpMeta, "http://ns.microsoft.com/photo/1.2/", "MP:RegionInfo/MPRI:Regions");
if (array1 != null)
{
    return array1
        .Select((_, i) => XmpDirectory?.XmpMeta?.GetProperty("http://ns.microsoft.com/photo/1.2/", $"MP:RegionInfo/MPRI:Regions[{i + 1}]/MPReg:PersonDisplayName")?.Value)
        .Where(s => !string.IsNullOrEmpty(s))
        .ToList()
}

In my code, the array1 array does not seem to hold any useable data. So I only use its existence as an indicator that there is more data available under different queries.

Any idea how to directly get an array of "something" where I can directly access the PersonDisplayName and the Rectangle?

question from:https://stackoverflow.com/questions/65886004/extract-microsoft-photo-xmp-person-tags-with-metadata-extractor-dotnet

Answer 1

Waitting for answers