Method of diagnosing nutritious condition of crop in plant field
US6683970B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2000 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | Jun 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/8466
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of diagnosing nutritious condition of crop in a plant field is disclosed. The method comprises the steps of: locating a camera equipped with a plurality of image elements in a predetermined central depression angle with respect to the plant field; obtaining an amount of reflection light of a crop leaf for each image element by image-taking the field; obtaining an image-taken area for each unit image element by an area function constituted by a conversion variable including a ground clearance, an image element depression angle, the number of image elements and a field angle of the camera; making an area compensation of the amount of reflection light for each image element by the image-taken area; making a depression angle compensation of the amount of reflection light by a depression angle coefficient predetermined for compensating differences of amounts of reflection light correspondingly with image element depression angles; measuring an amount of light incident on the crop leaf; obtaining reflectance from the amount of the reflection light compensated and the measured amount of incident light; obtaining first crop information in a predetermined area based on the reflecta…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.