Patent ID: 11885683
Assignee: YARA INTERNATIONAL ASA
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. A non-transitory computer-readable storage medium comprising a computer program product, the computer program product comprising computer program code to perform, when executed on a mobile computing device comprising a digital camera, the steps of:
capturing by the digital camera of the mobile computing device a first image of a turned on light source of a peripheral removably attached to the mobile computing device, which first image is captured without a leaf interposed between the digital camera and the light source, wherein the light source is adapted to emit light at least partly absorbable by chlorophyll pigments, chlorophyll a and chlorophyll b;
retrieving exposure data of the first image;
capturing by the digital camera a second image with the leaf interposed between the digital camera and the turned on light source;
retrieving exposure data of the second image; and
estimating a chlorophyll content of the leaf based on the retrieved exposure data of the first and second images, wherein a processor of the mobile computing device estimates the chlorophyll content of the leaf based on at least one of an exposure time, F-number, and ISO value of the first and second images.