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New internal index for clustering validation based on graphs
(2017)
This paper presents two different versions of a new internal index for clustering validation using graphs. These graphs capture the structural characteristics of each cluster. In this way, the new index overcomes the ...
An analysis of seed colour during ripening of cabernet sauvignon grapes
(2017)
This case study examines seed colour during ripening using an exhaustive colorimetric analysis. The aim
was to associate the chemical ripening with the seed colour in order to estimate the ripening stages of
Cabernet ...
Assessment of an automated digital method to estimate leaf area index (LAI) in cherry trees
(2016)
study was carried out during two growing seasons to evaluate the performance of a digital photography method to estimate the leaf area index (LAID) of cherry tree cultivars. The trial comprised 10 ‘Bing’ and 10 ‘Sweetheart’ ...
Efficient exploitation of the Xeon Phi architecture for the Ant Colony Optimization (ACO) metaheuristic
(2017)
In recent years, the use of compute-intensive coprocessors has been widely studied in the field of Parallel Computing to accelerate sequential processes through a Graphic Processing Unit (GPU). Intel has recently released ...
A new descriptor for person identity verification based on handwritten strokes off-line analysis
(2017)
A new descriptor for the verification of people’s identity through the analysis of handwritten text is presented. The proposed descriptor corresponds to a representation of the pattern of writing pressure computed from the ...
A method to estimate grape phenolic maturity based on seed images
(2014)
The timing of the grape harvest has a strong impact on wine quality. A recent line of studies proposes visual seed inspection by a trained expert to determine Phenolic Maturity. In this paper a method is presented to ...
Automated computation of leaf area index from fruit trees using improved image processing algorithms applied to canopy cover digital photograpies
(2016)
Leaf area index (LAI) is a critical parameter in plant physiology for models related to growth, photosynthetic
activity and evapotranspiration. It is also important for farm management purposes, since it can be
used to ...
A non-Newtonian gradient for contour detection in images with multiplicative noise
(2012)
In this paper, a new operator for contour detection in images with multiplicative noise is presented. Traditional methods of edge detection, as those based in gradient operator or measures of variance, follow a logic and ...
Grape maturity estimation based on seed images and neural networks
(2014)
The grape phenolic maturity is one of the most important parameters to determine the optimal time for harvest. In this paper we propose an innovative methodology for the problem of how this task is performed today. In ...
A method to construct fruit maturity color scales based on support machines for regression: Application to olives and grape seeds
(2015)
Color scales are a powerful tool used in agriculture for estimate maturity of fruits. Fruit maturity is an important parameter to determine the harvest time. Typically, to obtain the maturity grade, a human expert visually ...