If you want to actually decode the crop formation, here's how to do it. First, grab tello's PNG, which is a transformed and color-adjusted version of the crop

If you want to actually decode the crop formation, here's how to do it. First, grab tello's PNG, which is a transformed and color-adjusted version of the crop formation: https://files-diers.us.s3.amazonaws.com/cornfield.png https://files-diers.us.s3.amazonaws.com/cornfield.png Next, download and compile the latest release of libdmtx, which is a datamatrix I/O library: http://www.libdmtx.org/ http://www.libdmtx.org/ https://sourceforge.net/projects/libdmtx/files/libdmtx/0.7.2/libdmtx-0.7.2.tar.bz2/download https://sourceforge.net/projects/libdmtx/files/libdmtx/0.7.2... Finally, use dmtxread from libdmtx: dmtxread -n cornfield.png The extended explanation is in these comments: http://news.ycombinator.com/item?id=924377 http://news.ycombinator.com/item?id=924377 http://news.ycombinator.com/item?id=924495 http://news.ycombinator.com/item?id=924495