GLAMA – Gap Light Analysis Mobile Application
© Lubomír Tichý, Dept. of Botany and Zoology, MU Brno, Czech Republic, 2014-2015
Freeware Scientific Application
‘Gap Light Analysis Mobile App’ (GLAMA) is a program newly developed by the author and freely accessible from the Google Play website. It can
be used for
analysing hemispherical, wide-angle and standard photographs
(with known angle of lens
view). The photographs may be analysed either
or directly from a smartphone/tablet camera or as JPEG files on a computer with Android operation system or Android simulator. This means that the
application can be used either
directly in field research, or to analyse stored hemispherical photographs previously taken with a digital
camera. Most parameters need to be set only once, with
the subsequent photographs automatically subject to most of the previously defined parameters. Therefore, the analysis of a photograph
takes only a few seconds. If
photographs are taken without a fisheye lens, it is
necessary to first measure the real
view angle of the camera
(to assess level of artificial masking of the portion
of the hemisphere
that is not photographed) and recalculate it in pixels of
the photograph to the radius of
the whole hemisphere. These two parameters allow correct CaCo index calculation on any camera device. The application can also be
used as a tool to train students and plant ecology researchers inaccurate estimation of forest canopy
cover in the field.
Download
Application – version
3.0 (30. 6. 2015)
User’s manual
– version 3.0 (30. 6. 2015)