Overhead spectral imaging has enabled a variety of quantitative remote sensing techniques. However, the derived surface reflectance upon which these techniques rely is generally directional and dependent upon the incident solar and receiving detector angles. The bidirectional reflectance distribution function (BRDF) is becoming increasingly important with the development of non-nadir, multi-angle systems. A BRDF measurement approach in the visible to near infrared is described which is suitable for field use. An imaging technique measures BRDF but also enables the generation of the BRDF variability, or the bidirectional reflectance variance function (BRVF). From the measurements, the BRVF and spectral correlation statistics may be produced which are tailored to a sensor's point spread function. Spectral BRDF and BRVF may then be incorporated into spectral algorithms or used for synthetic image generation having accurate spatial and spectral variability, which is of great interest for exercising spectral algorithms.

Publication Date



"A novel BRDF measurement technique with spatial resolution-dependent spectral variance," IGARRS 2004: Exploring and Managing a Changing Planet, Multi-Angular Optical Measurments. Geoscience and Remote Sensing Symposium. Held in Anchorage, Alaska: 20-24 Septmber 2004. ©2004 Institute of Electrical and Electronics Engineers (IEEE). Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.ISBN:0-7803-8742-2Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works in February 2014.

Document Type


Department, Program, or Center

Chester F. Carlson Center for Imaging Science (COS)


RIT – Main Campus