Mama Information Technology & GIS Solutions Ltd has specialized in Trees feature extraction for both automated and manual approach, this depends on the requirements of our clients and their license terms purchased. See some area depicted below (before & after Trees Feature extractions).
Before Trees Feature extraction using GP tools and other features by digitization.

After Trees Feature extraction using GP tools and other features by digitization.

added to that of Trees we also further down to Grass Feature Extraction using GP tools.