Recent Submissions

  • Multi-tree woody structure reconstruction from mobile terrestrial laser scanner point clouds based on a dual neighbourhood connectivity graph algorithm 

    Méndez, Valeriano; Rosell Polo, Joan Ramon; Pascual Roca, Miquel; Escolà i Agustí, Alexandre (Elsevier, 2016)
    A process is presented for the vector reconstruction of fruit plantations based on the model developed by Verroust and Lazarus. To solve occlusion problems, the use of a dual graph of local and extended connectivity is ...
  • SIMLIDAR – Simulation of LIDAR performance in artificially simulated orchards 

    Méndez, Valeriano; Catalán, Heliodoro; Rosell Polo, Joan Ramon; Arnó Satorra, Jaume; Sanz Cortiella, Ricardo; Tarquis, Ana (Elsevier, 2012)
    SIMLIDAR is an application developed in C++ that generates an artificial orchard using a Lindenmayer system. The application simulates the lateral interaction between the artificial orchard and a laser scanner or LIDAR ...
  • Relationship between tree row LIDAR-volume and leaf area density for fruit orchards and vineyards obtained with a LIDAR 3D Dynamic Measurement System 

    Sanz Cortiella, Ricardo; Rosell Polo, Joan Ramon; Llorens Calveras, Jordi; Gil Moya, Emilio; Planas de Martí, Santiago (Elsevier, 2013)
    In this work, a LIDAR 3D Dynamic Measurement System, based on a Two-Dimensional Terrestrial Laser-LIDAR Scanner (2D TLS), was used for the geometric characterisation of tree-row crops (apple trees, pear trees and vineyards). ...
  • LiDAR simulation in modelled orchards to optimise the use of terrestrial laser scanners and derived vegetative measures 

    Méndez, Valeriano; Catalán, Heliodoro; Rosell Polo, Joan Ramon; Arnó Satorra, Jaume; Sanz Cortiella, Ricardo (Elsevier, 2013)
    Light detection and ranging (LiDAR) technology is beginning to have an impact on agriculture. Canopy volume and/or fruit tree leaf area can be estimated using terrestrial laser sensors based on this technology. However, ...
  • Deciduous tree reconstruction algorithm based on cylinder fitting from mobile terrestrial laser scanned point clouds 

    Méndez, Valeriano; Rosell Polo, Joan Ramon; Sanz Cortiella, Ricardo; Escolà i Agustí, Alexandre; Catalán, Heliodoro (Elsevier, 2014)
    Vector reconstruction of objects from an unstructured point cloud obtained with a LiDAR-based system (light detection and ranging) is one of the most promising methods to build three dimensional models of orchards. The ...
  • Measurement of spray drift with a specifically designed lidar system 

    Gregorio López, Eduard; Torrent Martí, Xavier; Planas de Martí, Santiago; Solanelles Batlle, Francesc; Sanz Cortiella, Ricardo; Rocadenbosch Burillo, Francesc; Masip Vilalta, Joan; Rosell Polo, Joan Ramon; Ribes Dasi, Manuel (MDPI, 2016)
    Field measurements of spray drift are usually carried out by passive collectors and tracers. However, these methods are labour- and time-intensive and only provide point- and time-integrated measurements. Unlike these ...
  • Potential of a terrestrial LiDAR-based system to characterise weed vegetation in maize crops 

    Andújar, Dionisio; Escolà i Agustí, Alexandre; Rosell Polo, Joan Ramon; Fernández-Quintanilla, César; Dorado, José (Elsevier, 2013)
    LiDAR (Light Detection And Ranging) is a remote-sensing technique for the measurement of the distance between the sensor and a target. A LiDAR-based detection procedure was tested for characterisation of the weed vegetation ...
  • Lidar: towards a new methodology for field measurement of spray drift 

    Gregorio López, Eduard; Torrent Martí, Xavier; Solanelles Batlle, Francesc; Sanz Cortiella, Ricardo; Rocadenbosch Burillo, Francesc; Masip Vilalta, Joan; Ribes Dasi, Manuel; Planas de Martí, Santiago; Rosell Polo, Joan Ramon (Association of Applied Biologists, 2016)
    Lidar technology is becoming a promising alternative for spray drift measurement to the labour and time-expensive methodologies based on the ISO 22866 standard. This paper presents last advancements in an eye-safe lidar ...
  • Design of a decision support method to determine volume rate for vineyard spraying 

    Gil Moya, Emilio; Escolà i Agustí, Alexandre (American Society of Agricultural and Biological Engineers, 2009)
    Dose determination in crops such as grapevine, which develops a large canopy within a relatively short period of time, becomes a key factor on the final success of plant protection product (PPP) application. Efficacy of ...
  • Weed discrimination using ultrasonic sensors 

    Andújar, Dionisio; Escolà i Agustí, Alexandre; Dorado, José; Fernández-Quintanilla, César (John Wiley & Sons, 2011)
    A new approach is described for automatic discrimination between grasses and broad-leaved weeds, based on their heights. An ultrasonic sensor was mounted on the front of a tractor, pointing vertically down in the inter-row ...
  • Variable rate application of plant protection products in vineyard using ultrasonic sensors 

    Gil Moya, Emilio; Escolà i Agustí, Alexandre; Rosell Polo, Joan Ramon; Planas de Martí, Santiago; Val, Luis (Elsevier, 2007)
    The changes in the shape and size of vines during the growing season require a continuous adjustment of the applied dose to optimize spray application efficiency. Target detection with ultrasonic sensors can be used to ...
  • Variable rate sprayer. Part 2 – Vineyard prototype: design, implementation, and validation 

    Gil Moya, Emilio; Llorens Calveras, Jordi; Llop, Jordi; Fàbregas, X.; Escolà i Agustí, Alexandre; Rosell Polo, Joan Ramon (Elsevier, 2013)
    The structural characteristics of the canopy are a key consideration for improving the efficiency of the spray application process for tree crops. However, obtaining accurate data in an easy, practical, and efficient way ...
  • Variable rate sprayer. Part 1 – Orchard prototype: design, implementation and validation 

    Escolà i Agustí, Alexandre; Rosell Polo, Joan Ramon; Planas de Martí, Santiago; Gil Moya, Emilio; Pomar Gomà, Jesús; Camp, Ferran; Llorens Calveras, Jordi; Solanelles Batlle, Francesc (Elsevier, 2013)
    Discussions in recent decades about dosage models for applying plant protection products in orchards have failed to reach a compromise solution. Furthermore, canopies are spatially variable, and a uniform dose may not be ...
  • Algebraic path tracking to aid the manual harvesting of olives using an automated service unit 

    Auat Cheein, Fernando A.; Scaglia, Gustavo; Torres-Torriti, Miguel; Guivant, José; Prado, Alvaro Javier; Arnó Satorra, Jaume; Escolà i Agustí, Alexandre; Rosell Polo, Joan Ramon (Elsevier, 2016)
    Service units used in precision agriculture are able to improve processes such as harvesting, sowing, agrochemical application, and manure spreading. This two-part work presents, a path tracking controller based on an ...
  • Real-time approaches for characterization of fully and partially scanned canopies in groves 

    Auat Cheein, Fernando A.; Guivant, José; Sanz Cortiella, Ricardo; Escolà i Agustí, Alexandre; Yandún, Francisco; Torres-Torriti, Miguel; Rosell Polo, Joan Ramon (Elsevier, 2015)
    Efficient information management in orchard characterization leads to more efficient agricultural processes. In this brief, a set of computational geometry methods are presented and evaluated for orchard characterization; ...
  • Mapping vineyard leaf area using mobile terrestrial laser scanners: should rows be scanned on-the-go or discontinuosly sampled? 

    Moral Martínez, Ignacio del; Rosell Polo, Joan Ramon; Company Mesa, Joaquim; Sanz Cortiella, Ricardo; Escolà i Agustí, Alexandre; Masip Vilalta, Joan; Martínez Casasnovas, José Antonio; Arnó Satorra, Jaume (Molecular Diversity Preservation International, 2016-01-19)
    The leaf area index (LAI) is defined as the one-side leaf area per unit ground area, and is probably the most widely used index to characterize grapevine vigor. However, LAI varies spatially within vineyard plots. Mapping ...
  • Influence of the scanned side of the row in terrestrial laser sensor applications in vineyards: practical consequences 

    Arnó Satorra, Jaume; Escolà i Agustí, Alexandre; Masip Vilalta, Joan; Rosell Polo, Joan Ramon (Springer, 2015)
    Terrestrial laser scanners (TLS) have been used to estimate leaf area and optimise the site-specific management in vineyards. The tree area index (TAI) is a parameter that can be obtained from TLS measurements and has been ...
  • Leaf area index estimation in vineyards using a ground-based LiDAR scanner 

    Arnó Satorra, Jaume; Escolà i Agustí, Alexandre; Vallès Petit, Josep Maria; Llorens Calveras, Jordi; Sanz Cortiella, Ricardo; Masip Vilalta, Joan; Palacín Roca, Jordi; Rosell Polo, Joan Ramon (Springer, 2013)
    Estimation of grapevine vigour using mobile proximal sensors can provide an indirect method for determining grape yield and quality. Of the various indexes related to the characteristics of grapevine foliage, the leaf area ...
  • Spatial variability in grape yield and quality influenced by soil and crop nutrition characteristics 

    Arnó Satorra, Jaume; Rosell Polo, Joan Ramon; Blanco Ortiz, Ricardo; Ramos Martín, Ma. C. (Ma. Concepción); Martínez Casasnovas, José Antonio (Springer, 2012)
    Knowledge of spatial variability of soil fertility and plant nutrition is critical for planning and implementing site-specific vineyard management. To better understand the key drivers behind vineyard variability, yield ...
  • Digital Soil Mapping Using Artificial Neural Networks and Terrain-Related Attributes 

    Bagheri Bodaghabadi, Mohsen; Martínez Casasnovas, José Antonio; Salehi, Mohammad Hasan; Mohammadi, Jahangard; Esfandiarpoor Borujeni, Isa; Toomanian, Norair; Gandomkar, Amir (Elsevier, 2015)
    Detailed soil surveys involve costly and time-consuming work and require expert knowledge. Since soil surveys provide information to meet a wide range of needs, new methods are necessary to map soils quickly and accurately. ...

View more