14 research outputs found
WECIA Graph: Visualization of Classification Performance Dependency on Grayscale Conversion Setting
Grayscale conversion is a popular operation performed within image pre-processing of many computer vision systems, including systems aimed at generic object categorization. The grayscale conversion is a lossy operation. As such, it can signicantly in uence performance of the systems. For generic object categorization tasks, a weighted means grayscale conversion proved to be appropriate. It allows full use of the grayscale conversion potential due to weighting coefficients introduced by this conversion method. To reach a desired performance of an object categorization system, the weighting coefficients must be optimally setup. We demonstrate that a search for an optimal setting of the system must be carried out in a cooperation with an expert. To simplify the expert involvement in the optimization process, we propose a WEighting Coefficients Impact Assessment (WECIA) graph. The WECIA graph displays dependence of classication performance on setting of the weighting coefficients for one particular setting of remaining adjustable parameters. We point out a fact that an expert analysis of the dependence using the WECIA graph allows identication of settings leading to undesirable performance of an assessed system
Grapes and Wine
Grape and Wine is a collective book composed of 18 chapters that address different issues related to the technological and biotechnological management of vineyards and winemaking. It focuses on recent advances, hot topics and recurrent problems in the wine industry and aims to be helpful for the wine sector. Topics covered include pest control, pesticide management, the use of innovative technologies and biotechnologies such as non-thermal processes, gene editing and use of non-Saccharomyces, the management of instabilities such as protein haze and off-flavors such as light struck or TCAs, the use of big data technologies, and many other key concepts that make this book a powerful reference in grape and wine production. The chapters have been written by experts from universities and research centers of 9 countries, thus representing knowledge, research and know-how of many regions worldwide
Imagerie radar en ondes millimétriques appliquée à la viticulture
Avec lâexpansion des exploitations agricoles, le principe dâhomogĂ©nĂ©itĂ© du rendement (cĂ©rĂ©ales, fruitsâŠ) devient de moins en moins pertinent. Ce phĂ©nomĂšne de variabilitĂ© spatiale implique des consĂ©quences Ă©conomiques et environnementales avec le dĂ©veloppement de nouveaux concepts agricoles comme les « site-specific management » (gestion spĂ©cifique des parcelles). Les traitements tels que les fertilisants, les intrants et autres pesticides doivent ĂȘtre utilisĂ©s de maniĂšre diffĂ©rente en les appliquant au bon endroit, Ă la bonne pĂ©riode et au bon taux. Cette nouvelle façon de penser lâagriculture fait partie de lâagriculture de prĂ©cision (PA) et se concentre en quatre domaines technologiques : (i) la tĂ©lĂ©dĂ©tection, (ii) la navigation et guidage, (iii) la gestion des donnĂ©es et (iv) les technologies Ă taux variable. InitiĂ©e Ă la fin des annĂ©es 1990, la viticulture de prĂ©cision (PV) est une branche particuliĂšre de la PA, caractĂ©risĂ©e par des problĂ©matiques spĂ©cifiques Ă la viticulture. Les travaux effectuĂ©s durant cette thĂšse entrent dans le cadre de la tĂ©lĂ©dĂ©tection (ou dĂ©tection proche) appliquĂ©e Ă la PV. Ils se focalisent sur une nouvelle mĂ©thode dâestimation de la quantitĂ© de grappes (masse ou volume) directement sur les plants de vignes. Pouvoir estimer le rendement des vignes plusieurs semaines avant la rĂ©colte offre de nombreux avantages avec des impacts Ă©conomiques et qualitatifs, avec par exemple : (i) lâamĂ©lioration du rapport rendement/qualitĂ© en supprimant au plut tĂŽt une partie de la rĂ©colte, (ii) lâoptimisation des ressources humaines et la logistique Ă la rĂ©colte, (iii) un remboursement le plus Ă©quitable par les assurances en cas dâintempĂ©ries qui endommageraient les pieds de vignes. La mĂ©thode proposĂ©e ici repose sur lâimagerie microondes (Ă 24GHz ou des frĂ©quences plus Ă©levĂ©es) gĂ©nĂ©rĂ©e par un radar FM-CW. Elle implique la mise en place dâun systĂšme dâinterrogation intra-parcellaire « pied par pied » Ă distance basĂ© au sol, et en particulier : (i) lâĂ©valuation de la prĂ©cision des mesures et les limites du systĂšme, (ii) le dĂ©veloppement dâalgorithmes spĂ©cifiques pour lâanalyse de donnĂ©es tridimensionnelles, (iii) la construction dâestimateurs pour retrouver le volume des grappes, et finalement (iv) lâanalyse des donnĂ©es recueillies pendant les campagnes de mesures. DĂ» au caractĂšre saisonnier des rĂ©coltes, les mesures sont en premier lieu effectuĂ©es sur des cibles canoniques, des charges variables et des capteurs passifs en laboratoire. Pour mettre en avant la flexibilitĂ© de cette interrogation radar, le mĂȘme systĂšme est utilisĂ© en parallĂšlement dans le cadre du projet rĂ©gional PRESTIGE, pour compter Ă distance le nombre de pommes prĂ©sentes sur les pommiers en verger. Ces travaux ont Ă©tĂ© financĂ©s par lâentreprise Ovalie-Innovation et lâANRT (Agence Nationale de la Recherche Technologique)
ABC: Adaptive, Biomimetic, Configurable Robots for Smart Farms - From Cereal Phenotyping to Soft Fruit Harvesting
Currently, numerous factors, such as demographics, migration patterns, and economics, are leading to the critical labour shortage in low-skilled and physically demanding parts of agriculture. Thus, robotics can be developed for the agricultural sector to address these shortages. This study aims to develop an adaptive, biomimetic, and configurable modular robotics architecture that can be applied to multiple tasks (e.g., phenotyping, cutting, and picking), various crop varieties (e.g., wheat, strawberry, and tomato) and growing conditions. These robotic solutions cover the entire perceptionâactionâdecision-making loop targeting the phenotyping of cereals and harvesting fruits in a natural environment.
The primary contributions of this thesis are as follows. a) A high-throughput method for imaging field-grown wheat in three dimensions, along with an accompanying unsupervised measuring method for obtaining individual wheat spike data are presented. The unsupervised method analyses the 3D point cloud of each trial plot, containing hundreds of wheat spikes, and calculates the average size of the wheat spike and total spike volume per plot. Experimental results reveal that the proposed algorithm can effectively identify spikes from wheat crops and individual spikes. b) Unlike cereal, soft fruit is typically harvested by manual selection and picking. To enable robotic harvesting, the initial perception system uses conditional generative adversarial networks to identify ripe fruits using synthetic data. To determine whether the strawberry is surrounded by obstacles, a cluster complexity-based perception system is further developed to classify the harvesting complexity of ripe strawberries. c) Once the harvest-ready fruit is localised using point cloud data generated by a stereo camera, the platformâs action system can coordinate the arm to reach/cut the stem using the passive motion paradigm framework, as inspired by studies on neural control of movement in the brain. Results from field trials for strawberry detection, reaching/cutting the stem of the fruit with a mean error of less than 3 mm, and extension to analysing complex canopy structures/bimanual coordination (searching/picking) are presented.
Although this thesis focuses on strawberry harvesting, ongoing research is heading toward adapting the architecture to other crops. The agricultural food industry remains a labour-intensive sector with a low margin, and cost- and time-efficiency business model. The concepts presented herein can serve as a reference for future agricultural robots that are adaptive, biomimetic, and configurable
Application of Analytical Chemistry to Foods and Food Technology
The application of analytical chemistry to the food sector allows the determination of the chemical composition of foods and the properties of their constituents, contributing to the definition of their nutritional and commodity value. Furthermore, it is possible to study the chemical modifications that food constituents undergo as a result of the treatments they undergo (food technology). Food analysis, therefore, allows us not only to determine the quality of a product or its nutritional value, but also to reveal adulterations and identify the presence of xenobiotic substances potentially harmful to human health. Furthermore, some foods, especially those of plant origin, contain numerous substances with beneficial effects on health. While these functional compounds can be obtained from a correct diet, they can also be extracted from food matrices for the formulation of nutraceutical products or added to foods by technological or biotechnological means for the production of functional foods. On the other hand, the enormous growth of the food industry over the last 50 years has broadened the field of application of analytical chemistry to encompass not only food but also food technology, which is fundamental for increasing the production of all types of food
Gestione sostenibile del vigneto mediante Data Science e Big Data Management
Negli ultimi anni, la ricerca in ambito viticolo (Vitis vinifera L.) eÌ stata notevolmente influenzata dalla necessitaÌ duplice di rispondere alla crescente domanda di prodotto ad elevati standard qualitativi e a mediare criticitaÌ derivanti dagli effetti del cambiamento climatico. Alla base della mediazione di tali fattori risulta fondamentale una ricalibrazione della gestione del vigneto, spostandosi da un approccio convenzionale che prevede una sua gestione come unitaÌ omogenea, verso uno che tenga in considerazione le sue discontinuitaÌ spaziali legate alle peculiaritaÌ pedoclimatiche e alle variabili biotiche, le quali, avendo riflessi eterogenei sul ciclo biologico della vite, determinano un uso non sempre razionale delle risorse. Emerge cosiÌ lâesigenza di un rinnovamento dei sistemi di monitoraggio, che unisca il trasferimento tecnologico alle conoscenze scientifiche pregresse, verso usi mirati e calibrati sull'ambito viticolo, attraverso i quali poter attuare strategie previsionali che permettano la salvaguardia degli equilibri ecologici pur mantenendo inalterato il livello di produttivitaÌ e qualitaÌ. Nello scenario della moderna viticoltura, il flusso di dati estratti dal campo proviene da fonti diverse tra loro. Si tratta di informazioni relative a diversi aspetti, che vanno dalla caratterizzazione della fisiologia delle piante, alla natura del contesto pedoclimatico fino a dati relativi alla gestione colturale: concimazione, irrigazione, potatura. Appare chiaro che, oltre a fornire grandi opportunitaÌ di indagine del sistema vigneto, questa abbondanza e diversificazione dei dati pone di fronte lâonere di dover gestire moli di dati spesso non strutturati che, pur avendo un grande valore intrinseco, richiedono di essere analizzate e sintetizzate affincheÌ possano essere utilizzate in maniera proficua per la gestione agronomica del vigneto. Questi, infatti, se slegati dal contesto o se letti individualmente, danno spesso informazioni assai scarse, difficilmente leggibili, poco legate alla realtaÌ applicativa e che in alcuni casi portano ad errori. Lo scopo dellâanalisi di tali dati (chiamati non a caso Big Data) eÌ quindi quello di individuare correlazioni, tendenze, pattern che si ripetono secondo schemi piuÌ o meno intuitivi, dinamiche di interdipendenza nascoste o comunque non facilmente identificabili, al fine di elaborare modelli simulativi costantemente aggiornati sulla base della biodiversitaÌ del panorama viticolo e dei contesti pedoclimatici, che consentano decisioni basate su dati piuÌ strettamente connessi alla realtaÌ di campo anzicheÌ sulla semplice speculazione empirica o su serie storiche, con relativi vantaggi gestionali. Gli obiettivi della tesio sono stati quelli di: (i) sviluppare metodologie per l'acquisizione e l'analisi di immagini RGB dal contesto vigneto ed estrarre e analizzare i dati ad esse relativi per meglio comprendere le criticitaÌ, i vantaggi e le prospettive applicative di tale tecnologia; (ii) sviluppare modelli per la stima dello stato idrico della vite basati sull'analisi spazio-temporale di dati relativi al sistema pianta-suolo-atmosfera, per acquisire utili informazioni sulla gestione dell'irrigazione; (iii) applicare le metodologie e i modelli di simulazione sviluppati su casi studio reali per valutarne le prestazioni, confrontandoli con metodi esistenti, e analizzando la loro accuratezza nel fornire informazioni per la gestione sostenibile del vigneto
Effects of Irrigation Rate and Planting Density on Maize Yield and Water Use Efficiency in the Temperate Climate of Serbia
Scarce water resources severely limit maize (Zea mays L.) cultivation in the temperate regions
of northern Serbia. A two-year field experiment was conducted to investigate the effects of
irrigation and planting density on yield and water use efficiency in temperate climate under
sprinkler irrigation. The experiment included five irrigation treatments (full irrigated treatment â FIT; 80% FIT, 60% FIT, 40% FIT, and rainfed) and three planting densities (PD1: 54,900 plants haâ1
; PD2: 64,900 plants haâ1; PD3: 75,200 plants haâ1). There was increase in yield with the irrigation (1.05â80.00%) as compared to the rainfed crop. Results showed that decreasing irrigation rates resulted in a decrease in yield, crop water use efficiency (WUE), and irrigation water use efficiency (IWUE). Planting density had significant effects on yield, WUE, and IWUE which differed in both years. Increasing planting density gradually increased yield, WUE, and IWUE. For the pooled data, irrigation rate, planting density and their interaction was significant (P < 0.05). The highest two-year average yield, WUE, and IWUE were found for FIT-PD3 (14,612 kg haâ1), rainfed-PD2 (2.764 kg mâ3), and 60% FITPD3 (2.356 kg mâ3), respectively. The results revealed that irrigation is necessary for maize cultivation because rainfall is insufficient to meet the crop water needs. In addition, if water becomes a limiting factor, 80% FIT-PD3 with average yield loss of 15% would be the best agronomic practices for growing maize with a sprinkler irrigation system in a temperate climate of Serbia
Proceedings of the 10th International Chemical and Biological Engineering Conference - CHEMPOR 2008
This volume contains full papers presented at the 10th International Chemical and Biological
Engineering Conference - CHEMPOR 2008, held in Braga, Portugal, between September 4th and
6th, 2008.FC