D. Demilly

D. Demilly
Le Groupe d'Etude et de contrôle des Variétés Et des Semences. | GEVES

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38
Publications
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355
Citations

Publications

Publications (38)
Article
Full-text available
Faced with the challenges of adapting agriculture to climate change, seed production should have increased resilience to abiotic stress factors and the expected proliferation of pathogens. This concerns both the nutritional quality and seed vigor, two crucial factors in seedling establishment and yield. Both qualities are acquired during seed devel...
Article
This study aimed to set a computer-integrated multichannel spectral imaging system as a high-throughput phenotyping tool for the analysis of individual cowpea seeds harvested at different developmental stages. The changes in germination capacity and variations in moisture, protein and different sugars during twelve stages of seed development from 1...
Article
Full-text available
Several seed and seedling traits are measured to evaluate germination and emergence potential in relation with environmental conditions. More generally, these traits are also measured in the field of ecology as simple traits that can be correlated to other adaptative traits more difficult to measure on adult plants, as for example traits of the roo...
Article
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Background The traditional methods for evaluating seeds are usually performed through destructive sampling followed by physical, physiological, biochemical and molecular determinations. Whilst proven to be effective, these approaches can be criticized as being destructive, time consuming, labor intensive and requiring experienced seed analysts. Thu...
Article
Full-text available
Seed imbibition is a very important process in plant biology by which, thanks to a simple water income, a dry seed may turn into a developing organism. In natural conditions, this process occurs in the soil, e.g., with difficult access for a direct observation. Monitoring the seed imbibition with non-invasive imaging techniques is therefore an impo...
Article
Full-text available
A wide range of species can be sown as cover crops during fallow periods to provide various ecosystem services. Plant establishment is a key stage, especially when sowing occurs in summer with high soil temperatures and low water availability. The aim of this study was to determine the response of germination to temperature and water potential for...
Article
Breeding oilseed rape for oil and protein contents may have led to differences in seedling emergence in genotypes. New opportunities for deep automated phenotyping of germination and seedling growth are being developed on phenotyping platforms. Our aim was to demonstrate that using these data to parameterize a crop emergence model complements field...
Article
Full-text available
The practical value of a criterion based on statistical information theory is demonstrated for the selection of optimal wavelength and bandwidth of low-cost lighting systems in plant imaging applications. Kullback–Leibler divergence is applied to the problem of spectral band reduction from hyperspectral imaging. The results are illustrated on vario...
Article
This article proposes a computer-vision based protocol, useful to contribute to high-throughput automated phenotyping of seedlings during elongation, the stage following germination. Radicle and hypocotyl are two essential organs which start to develop at this stage, with the hypocotyl growing towards the soil surface and the radicle exploring deep...
Conference Paper
In this report, we present a 3D simulator for the numerical validation of segmentation algorithms for seedling in soil from X-ray or MRI. A 3D simulator of root in elongation is coupled to a simulator of the image acquisition to generate images of simulated seedling associated with a known synthetic ground truth. We detail how acquisition parameter...
Conference Paper
Full-text available
In this report, we present a 3D simulator for the numerical validation of segmentation algorithms for seedling in soil from X-ray or MRI. A 3D simulator of root in elongation is coupled to a simulator of the image acquisition to generate images of simulated seedling associated with a known synthetic ground truth. We detail how acquisition parameter...
Article
This article proposes a methodology for the numerical validation of image processing algorithms dedicated to the segmentation of roots of plants with machine vision. A simulator of plant growth is coupled to a simulator of the image acquisition to generate images of simulated plants associated with a known synthetic ground truth. The simulator inco...
Article
Full-text available
Nous présentons un prototype de système de vision associé à un logiciel de traitement et d'analyse d'images, appliqués en biologie végétale pour le suivi automatisé et la caractérisation quantitative du développement de semences et de plantules. Le système de vision peut incorporer différentes modalités d'imagerie, et il est actuellement employé en...
Article
A variant of the Perona-Malik anisotropic diffusion equation is introduced for the segmentation of multiple objects with crossings. The diffusion is automatically applied at the crossings locations along the main orientations of the objects. Application of this process is given for illustration on an original problem of plant imaging with the monit...
Article
In this report, we present an original image processing pipeline that we have developed under the ImageJ software for a specific application in the domain of plant science. In this domain, numerical X-ray imaging is applied more and more often for its capabilities for noninvasive inspection of internal structures of interest, in order to assess, fo...
Article
We demonstrate the value of thermal imaging for monitoring growth of seedling organs. An automated procedure is introduced to perform the segmentation of the organs of the seedlings from the thermal contrasts in the images. Results of the automated procedure were assessed visually by expert operators in a separate procedure. This constitutes a new...
Article
Full-text available
Enhancing the knowledge on the genetic basis of germination and heterotrophic growth at extreme temperatures is of major importance for improving crop establishment. A quantitative trait loci (QTL) analysis was carried out at sub- and supra-optimal temperatures at these early stages in the model Legume Medicago truncatula. On the basis of an ecophy...
Article
Full-text available
QTL analysis of Medicago truncatula seed germination and heterotrophic growth
Article
Transcriptomic and cellular analyses of heterotrophic growth at low temperature in Medicago truncatula
Conference Paper
En 1994 la Station Nationale d’Essai de Semences s’est engagée dans des travaux de recherche visant à utiliser la vision artificielle pour l’analyse des lots de semences. Ceux-ci ont été abordés dans des projets interdisciplinaires avec l’USC (INRA ENITIAA), le LISA de l’Université d’Angers, l’ESEO, l’INH, la FNAMS et Vilmorin. Ces recherches ont p...
Conference Paper
Germination time courses provide a reliable characterization of seed lots quality. They allow useful comparison of seed lots using hydrothermal models and the numerous criteria they provide for physiological quality. But practical acquisition of germination data still limits their use in seed companies but also in research laboratories: hand counti...
Conference Paper
The purpose of our work is to develop a high speed automatic system for measuring seeds features or identifying them by using artificial vision.
Article
The variability of the size of carrot seeds (Daucus carota L.) causes heterogeneity in the crop. Some studies show that the size of seeds is correlated to the germination process (Sokolowska et al., 1997), (Guberac et al., 1998). Having lots of seeds of the same size will therefore minimize the disparity among seeds during sowing and germination. C...
Conference Paper
Full-text available
In the domain of artificial vision, many applications are based on the discrimination of qualitative groups from features that are extracted from numeric images. In such situation, either discriminant analysis or multilayer perceptron network (MLPN) are very often used. Probabilistic neural networks (PNN), can be a relevant alternative to MLPN. The...
Poster
Full-text available
3 posters about the conception and development of a system for the artificial vision of seeds

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Project (1)
Project
Cover cropping is an efficient way to produce ecosystem services (reduction of nitrate leaching and recycing N; C storage; reduction of soil erosion; etc.) by replacing the use of pesticides (fertilizer-N and some pesticides). Cover crops and catch crops constitute one of the pillars of the application of agroecology in arable cropping systems.