The chlorophyll camera app captures and processes images from an Android phone and instantly computes the chlorophyll content of the leaves throughout the RGB components based on the stud Digital images taken in the field typically exhibit variation due to ambient lighting, shadows so the leaves should be photographed under identical illuminative conditions between 11:00 and 12:00 solar time in absence of clouds. Without detaching from the plant, leaves were hand flattened by pressing them on a white graduated support plane covered with a transparent sheet, to allow easy leaf pixels capture at the same focal distance. The light source, the angle and distance between light and leaf should be as much as possible constant. All data are logged and geo-referenced, and can be emailed to your PC for further analysis. You can vary area for which will be calculated the average RGB components. It is also possible to mediate the RGB values from different leaves. For chlorophyll estimation it is used an RGB multiple regression model that can be selected for different specie and manually modified for a specie not reported in the database.

Chlorophyll Camera (versione V1.0)

Riccardi M;Spasiano M;Pulvento C
2015

Abstract

The chlorophyll camera app captures and processes images from an Android phone and instantly computes the chlorophyll content of the leaves throughout the RGB components based on the stud Digital images taken in the field typically exhibit variation due to ambient lighting, shadows so the leaves should be photographed under identical illuminative conditions between 11:00 and 12:00 solar time in absence of clouds. Without detaching from the plant, leaves were hand flattened by pressing them on a white graduated support plane covered with a transparent sheet, to allow easy leaf pixels capture at the same focal distance. The light source, the angle and distance between light and leaf should be as much as possible constant. All data are logged and geo-referenced, and can be emailed to your PC for further analysis. You can vary area for which will be calculated the average RGB components. It is also possible to mediate the RGB values from different leaves. For chlorophyll estimation it is used an RGB multiple regression model that can be selected for different specie and manually modified for a specie not reported in the database.
2015
Istituto per i Sistemi Agricoli e Forestali del Mediterraneo - ISAFOM
Chlorophyll
camera
app
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/307633
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