Comparison of leaf surface roughness analysis methods by sensitivity to noise analysis

Bediaf, Houda; Sabre, Rachid; Journaux, Ludovic; Cointault, Frédéric

doi:10.1016/j.biosystemseng.2015.04.012

Cited by 17 publications

(10 citation statements)

References 27 publications

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“…While plant surface roughness has been assessed in few studies (e.g. Chowdhury et al, 2005;Bediaf et al, 2015), the distribution of chemical compounds in cuticle surfaces is unknown and both factors will affect contact phenomena with e.g. surface-deposited water, aerosol particles or microorganisms (Fernandez and Khayet, 2015).…”

Section: Plant Surface Composition and Structure Affects Wettability mentioning

confidence: 99%

Foliar water and solute absorption: an update

2020

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The absorption of water and solutes by plant leaves has been recognised since more than two centuries. Given the polar nature of water and solutes, the mechanisms of foliar uptake have been proposed to be similar for water and electrolytes, including nutrient solutions. Research efforts since the 19th century focussed on characterising the properties of cuticles and applying foliar sprays to crop plants as a tool for improving crop nutrition. This was accompanied by the development of hundreds of studies aimed at characterising the chemical and structural nature of plant cuticles from different species and the mechanisms of cuticular and, to a lower extent, stomatal penetration of water and solutes. The processes involved are complex and will be affected by multiple environmental, physico-chemical and physiological factors which are only partially clear to date. During the last decades, the body of evidence that water transport across leaf surfaces of native species may contribute to water balances (absorption and loss) at an ecosystem level has grown. Given the potential importance of foliar water absorption for many plant species and ecosystems as shown in recent studies, the aim of this review is to first integrate current knowledge on plant surface composition, structure, wettability and physico-chemical interactions with surface-deposited matter. The different mechanisms of foliar absorption of water and electrolytes and experimental procedures for tracing the uptake process are discussed before posing several outstanding questions which should be tackled in future studies.

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Section: Plant Surface Composition and Structure Affects Wettability mentioning

confidence: 99%

Foliar water and solute absorption: an update

2020

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“…Ainsi, une carte décrivant les comportements possibles de la goutte sur ce type de surface en fonction de la rugosité et de la vitesse d'impact a été établie (Rioboo et al, 2008 ;Massinon et al, 2012b). Plus de détails sur la propriété des surfaces et les interactions de la goutte-surface sont disponibles dans la littérature (Massinon et al, 2013 ;Bédiaf et al, 2015). En sus de la mouillabilité de la surface foliaire, l'architecture de la plante constitue un facteur primordial influençant le comportement de la goutte sur celle-ci et affecte la variabilité des dépôts.…”

Section: Propriétés De L'adventice à Traiterunclassified

Étude des potentialités des systèmes d’application contrôlée des gouttes (CDA) pour les traitements phytosanitaires en céréaliculture (synthèse bibliographique)

Salah¹,

Cock²,

Massinon³

et al. 2016

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Introduction. L’application contrôlée des gouttes (CDA) présente le double avantage de réduire à la fois l’étendue de la distribution des tailles des gouttes et le volume appliqué par rapport aux buses hydrauliques conventionnelles. Littérature. Cette revue investigue la potentialité de la CDA par rapport aux buses hydrauliques dans le cadre du désherbage précoce des adventices (2-3 feuilles). En termes de rétention, les études reliant les caractéristiques des gouttes (taille, vitesse et direction) et l’architecture, la densité et la mouillabilité du feuillage, en fonction de la formulation de bouillies, ont été abordées. Ces études montrent que des gouttes de 300 µm avec un adjuvant approprié et des jets émis 60° vers l’avant par rapport à la verticale contribuent à l’augmentation de la rétention sur les cibles problématiques à port dressé. L’effet des réductions des volumes d’application pour ces deux techniques est étudié sur base de la moyenne, du coefficient de variation et du taux de couverture des dépôts. Néanmoins, les résultats de ces études ne peuvent être généralisés du fait des différences de réglages opératoires entre les deux techniques d’application. Quant à la dérive, les atomiseurs CDA orientés horizontalement présentent un potentiel de dérive plus important que les buses hydrauliques pour lesquelles le spray est orienté vers le bas. La dérive augmente avec la vitesse du vent et diminue lorsque le diamètre médian volumétrique (DV50) augmente. Conclusions. De nouveaux réglages des atomiseurs de la CDA en termes de DV50 et de direction du jet peuvent répondre aux défis de l’agriculture de précision. Les pistes d'innovations proposées sont d’une part une amélioration de la résistance à l’usure des dents situées en bordure des disques et, d’autre part, une distribution granulométrique plus étroite.

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“…Scanning electron microscope (SEM) provides high-resolution micrograph of leaf surface, and with the help of computer vision techniques (e.g. fractal dimensional analysis [1,8,9], Fourier descriptors [10,11], visual classification [12,13]), it is one of the viable options for obtaining leaf surface roughness. However, before inspection using SEM, the preprocessing of samples is cumbersome.…”

Section: Introductionmentioning

confidence: 99%

Roughness measurement of leaf surface based on shape from focus

et al. 2021

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Background Surface roughness has a significant effect on leaf wettability. Consequently, it influences the efficiency and effectiveness of pesticide application. Therefore, roughness measurement of leaf surface offers support to the relevant research efforts. To characterize surface roughness, the prevailing methods have drawn support from large equipment that often come with high costs and poor portability, which is not suitable for field measurement. Additionally, such equipment may even suffer from inherent drawbacks like the absence of relationship between pixel intensity and corresponding height for scanning electron microscope (SEM). Results An imaging system with variable object distance was created to capture images of plant leaves, and a method based on shape from focus (SFF) was proposed. The given space-variantly blurred images were processed with the proposed algorithm to obtain the surface roughness of plant leaves. The algorithm improves the current SFF method through image alignment, focus distortion correction, and the introduction of NaN values that allows it to be applied for precise 3d-reconstruction and small-scale surface roughness measurement. Conclusion Compared with methods that rely on optical three-dimensional interference microscope, the method proposed in this paper preserves the overall topography of leaf surface, and achieves superior cost performance at the same time. It is clear from experiments on standard gauge blocks that the RMSE of step was approximately 4.44 µm. Furthermore, according to the Friedman/Nemenyi test, the focus measure operator SML was expected to demonstrate the best performance.

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Comparison of leaf surface roughness analysis methods by sensitivity to noise analysis

Cited by 17 publications

References 27 publications

Foliar water and solute absorption: an update

Foliar water and solute absorption: an update

Étude des potentialités des systèmes d’application contrôlée des gouttes (CDA) pour les traitements phytosanitaires en céréaliculture (synthèse bibliographique)

Roughness measurement of leaf surface based on shape from focus

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