A paper has been published in the Irrigation Science Journal that describes the development of a semi-automated and automated methodology for IR thermal image acquisition and analysis using programming techniques in MATLAB. The paper also includes a discussion of potential use of infrared thermal images for early detection of diseases.
Fuentes, S., De Bei, R. Pech, J., Tyerman, S. 2012. Computational water stress indices obtained from thermal image analysis of grapevine canopies. Irrigation Science. DOI: 10.1007/s00271-012-0375-8.
Link to the paper: IR Thermo Fuentes
Related paper: Fuentes S., Kelley G., Collins J., Rogers G., Conroy J. 2005. Use of Infrared Thermography to Assess Spatial and Temporal Variability of Stomatal Conductance of Grapevines Under Partial Root-zone Drying. An Irrigation Scheduling Application. Acta Horticulturae (ISHS) 689:309-316.