My name is Adam, I am a PhD candidate in the Department of Geography at Texas State University-San Marcos in San Marcos, Texas (between Austin and San Antonio). I, along with my co-author and advisor Jennifer Jensen, recently published a paper in Remote Sensing using a UAV-collected structure from motion (SfM) point cloud to estimate vineyard canopy LAI at a study vineyard in the Texas Hill Country.
Using the point cloud instead of a lidar dataset, we calculated several per-vine height-based metrics and compared these values to ceptometer-measured LAI values. The results of our preliminary study suggest that a SfM point cloud may be able to be used to estimate LAI, although currently only accounting for 57% of the variation in observed LAI.
If you are interested in reading the full paper, you can download it here: http://www.mdpi.com/2072-4292/5/5/2164.