Dear listers, I need some help to use the GLA Program.
There are a few steps to calculate canopy openess using GLA: 1 - Open an existing canopy image or scan in a new one: DOUBT: May I use a common square digital photo? I am planing to use black and white photos saved as monocromatic bitmap. If not possible, what is the best program to use with square digital photos? 2 - Register the image so that both the orientation and circular extent of the exposure are known. DOUBT: I am using the mouse and the pointer to draw a circle in each square photo; is it correct? 3 - If necessary, edit the configuration settings to reflect the site position and orientation, growing-season length, and atmospheric conditions. DOUBT: When using a square digital photo what to change in the configuration settings? 4 - Threshold the image so that the each pixel is accurately classified as either a sky (white) or non-sky (black) pixel. DOUBT: If I am using black and white pictures, it is usefull to use the threshold tool? It seems to me that does not change the results in this case! Thanks for any help! Prof. Dr. J. C. VOLTOLINI Universidade de Taubate - Departamento de Biologia Taubate, SP. 12030-010. E-Mail: jcvol...@uol.com.br ECOTROP (CNPq): http://dgp.cnpq.br/buscaoperacional/detalhegrupo.jsp?grupo=1546205IMB87W7 Currículo Lattes: http://lattes.cnpq.br/8137155809735635 Orkut ("Ensino de Ciência"): http://www.orkut.com.br/Main#Profile?rl=ls&uid=17608429643840608483 Fotos Artísticas: http://voltolini.album.uol.com.br/texturas. 'Siamo tutti angeli con un'ala e possiamo volare soltanto se ciabbracciamo'
