Automated Digital Photogrammetry on a Shoestring

A system capable of automatically deriving the three dimensional co‐ordinates of well defined binarized targets is described. Significantly, the system comprises cheap “off the shelf” hardware and software, requiring a minimum of development. Comparative tests using imagery obtained with a Hasselblad semi‐metric camera and a 35 mm SLR camera are presented. By means of automated sub‐pixel measurement, the results achieved are equivalent to those undertaken through manual target measurement using a first order analytical plotter.