Multispectral Imagery

Multispectral imagery is used at GEVES for testing wheat varieties for resistance to fusarium head blight. Other cereals and pathogens are also studied using the Videometer®. 

Videometer

The VideometerLab® is a tool for acquiring multispectral images. It consists of a digital camera (2056x2056 pixels), an integration sphere with 20 LEDS of different wavelengths, and software for calibrating, obtaining, and analysing the images. The image obtained is composed of 20 spectral bands ranging from ultraviolet to infrared (375-970nm).

 

 

 

 

L: Wheat kernels infected with F.graminearum / R: Image after classifying pixels in infected zones  (yellow/red) and healthy zones (blue).

The Videometer® provides a more accurate and rapid determination of the colour and chemical composition of a sample's surface.

Multispectral imagery is used at GEVES for phenotyping varieties and testing their resistance to fusarium head blight in wheat. This tool makes it possible to evaluate the percentage of kernels with symptoms of fusarium in soft wheat lots. With the use of a conveyer belt, a lot of 1000-1500 kernels can be treated in approximately 5 minutes.

The Videometer® can be useful for those looking to obtain information on variety phenotyping and testing resistance to fusarium (Fusarium graminearum & culmorum) for their varieties (breeders, technical institutes, researchers, teachers, farmers…).

The quantification of diseased kernels is based on a discriminant analysis between diseased and healthy kernels. For each new multispectral image obtained, the model classifies each pixel as belonging to an infected zone or a healthy zone.

 

Contacts

Ms Valérie CADOTHead of VCUS Bioagressor Resistance Testing
Ms Marlène FAURE

 

 

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