Abstract
A three-dimensional forest model and a geometric ray-tracing model were used to investigate the implications of forest bi-directional reflectance on the use of dual view or multi-temporal imagery for forest variable extraction. Previous studies have shown links between forest structure, shadow patterns and bi-directional reflectances. The emphasis in these studies was on the relationship between the shape of the hotspot and the full principal plane reflectance curve with variables such as canopy cover, crown size and crown shape. In this work these relationships are analysed to determine if they allow for the discrimination of canopy cover and crown shape from dual view or multi-temporal imagery. The analysis shows that a well chosen single viewing angle may give discrimination results similar to those obtained through use of a combination of two viewing angles. The addition of reflectance data recorded when the Sun is at a larger solar zenith angle is likely to have little impact on discrimination results for most viewing angles.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
