All Outputs (77)

Special issue on: Machine vision for outdoor environments (2018)
Journal Article

Highlights

•Outdoor machine vision
•Unstructured environments
•New advanced hardware
•Artificial intelligence

Innovative 3D and 2D machine vision methods for analysis of plants and crops in the field (2018)
Journal Article

© 2018 Elsevier B.V. Machine vision systems offer great potential for automating crop control, harvesting, fruit picking, and a range of other agricultural tasks. However, most of the reported research on machine vision in agriculture involves a 2D a... Read More about Innovative 3D and 2D machine vision methods for analysis of plants and crops in the field.

Photometric stereo for three-dimensional leaf venation extraction (2018)
Journal Article

© 2018 Elsevier B.V. Leaf venation extraction studies have been strongly discouraged by considerable challenges posed by venation architectures that are complex, diverse and subtle. Additionally, unpredictable local leaf curvatures, undesirable ambie... Read More about Photometric stereo for three-dimensional leaf venation extraction.

Automated monitoring of dairy cow body condition, mobility and weight using a single 3D video capture device (2018)
Journal Article

© 2018 Here we propose a low-cost automated system for the unobtrusive and continuous welfare monitoring of dairy cattle on the farm. We argue that effective and regular monitoring of multiple condition traits is not currently practicable and go on t... Read More about Automated monitoring of dairy cow body condition, mobility and weight using a single 3D video capture device.

BRDF of human skin in the visible spectrum (2017)
Journal Article

© Emerald Publishing Limited. Purpose - Significant research has been carried out in terms of development of new bidirectional reflectance distribution function (BRDF) instruments; however, there is still little research available regarding spectral... Read More about BRDF of human skin in the visible spectrum.

Photometric stereo technique suitability study for plant phenotyping (2017)
Presentation / Conference Contribution

The dynamic quantification of growth traits is critical for building accurate modelling tools to predict plant behaviour under different growth environments, and consequently in designing strategies to improve plant health and overall yields. We are... Read More about Photometric stereo technique suitability study for plant phenotyping.

Locomotion traits of dairy cows from overhead three-dimensional video (2016)
Presentation / Conference Contribution

We investigate two locomotion traits in dairy cows from overhead 3D video to observe lameness trends. Detecting lameness -particularly at an early stage- is important in order to allow early treatment which maximizes detection benefits. The proposed... Read More about Locomotion traits of dairy cows from overhead three-dimensional video.

Early and non-intrusive lameness detection in dairy cows using 3-dimensional video (2016)
Journal Article

© 2016 IAgrE Lameness is a major issue in dairy herds and its early and automated detection offers animal welfare benefits together with potentially high commercial savings for farmers. Current advancements in automated detection have not achieved a... Read More about Early and non-intrusive lameness detection in dairy cows using 3-dimensional video.

Overhead spine arch analysis of dairy cows from three-dimensional video (2016)
Presentation / Conference Contribution

We present a spine arch analysis method in dairy cows using overhead 3D video data. This method is aimed for early stage lameness detection. That is important in order to allow early treatment; and thus, reduce the animal suffering and minimize the h... Read More about Overhead spine arch analysis of dairy cows from three-dimensional video.

Quadruped locomotion analysis using three-dimensional video (2016)
Presentation / Conference Contribution

Abstract— To date, there has not been a single method
suitable for large-scale or regular-basis implementation to analyze the locomotion of quadruped animals. Existing methods are not sensitive enough for detecting minor deviations from healthy gait... Read More about Quadruped locomotion analysis using three-dimensional video.

Realistic and interactive high-resolution 4D environments for real-time surgeon and patient interaction (2016)
Journal Article

Copyright © 2016 John Wiley & Sons, Ltd. Background: Remote consultations that are realistic enough to be useful medically offer considerable clinical, logistical and cost benefits. Despite advances in virtual reality and vision hardware and softwa... Read More about Realistic and interactive high-resolution 4D environments for real-time surgeon and patient interaction.

Eye centre localisation: An unsupervised modular approach (2016)
Journal Article

© Emerald Group Publishing Limited. Purpose - This paper aims to introduce an unsupervised modular approach for eye centre localisation in images and videos following a coarse-to-fine, global-to-regional scheme. The design of the algorithm aims at ex... Read More about Eye centre localisation: An unsupervised modular approach.

Gender and gaze gesture recognition for human-computer interaction (2016)
Journal Article

© 2016 Elsevier Inc. The identification of visual cues in facial images has been widely explored in the broad area of computer vision. However theoretical analyses are often not transformed into widespread assistive Human-Computer Interaction (HCI) s... Read More about Gender and gaze gesture recognition for human-computer interaction.

Gender recognition from facial images: Two or three dimensions? (2016)
Journal Article

© 2016 Optical Society of America. This paper seeks to compare encoded features from both two-dimensional (2D) and three-dimensional (3D) face images in order to achieve automatic gender recognition with high accuracy and robustness. The Fisher vecto... Read More about Gender recognition from facial images: Two or three dimensions?.

Eye center localization and gaze gesture recognition for human-computer interaction (2016)
Journal Article

© 2016 Optical Society of America. This paper introduces an unsupervised modular approach for accurate and real-time eye center localization in images and videos, thus allowing a coarse-to-fine, global-to-regional scheme. The trajectories of eye cent... Read More about Eye center localization and gaze gesture recognition for human-computer interaction.

A 3D machine vision method for non-invasive assessment of respiratory function (2015)
Journal Article

Copyright © 2015 John Wiley & Sons, Ltd. Background: Respiratory function testing is important for detecting and monitoring illness, however, it is difficult for some patients, such as the young and severely ill, to perform conventional tests that... Read More about A 3D machine vision method for non-invasive assessment of respiratory function.

Combination of 3D skin surface texture features and 2D ABCD features for improved melanoma diagnosis (2015)
Journal Article

© 2015, International Federation for Medical and Biological Engineering. Two-dimensional asymmetry, border irregularity, colour variegation and diameter (ABCD) features are important indicators currently used for computer-assisted diagnosis of malign... Read More about Combination of 3D skin surface texture features and 2D ABCD features for improved melanoma diagnosis.

3D reconstruction of concave surfaces using polarisation imaging (2015)
Journal Article

© 2015 Taylor & Francis. This paper presents a novel algorithm for improved shape recovery using polarisation-based photometric stereo. The majority of previous research using photometric stereo involves 3D reconstruction using both the diffuse and... Read More about 3D reconstruction of concave surfaces using polarisation imaging.

A photometric stereo approach for chronic wound measurement (2015)
Journal Article

© 2015 © Emerald Group Publishing Limited. Purpose-This paper aims to review state of the art of techniques for dimensioning chronic wounds, and validate the possibilities of employing a new proposed optical imaging approach for general task of wound... Read More about A photometric stereo approach for chronic wound measurement.

An improved photometric stereo through distance estimation and light vector optimization from diffused maxima region (2014)
Journal Article

© 2013 Elsevier B.V. All rights reserved. Although photometric stereo offers an attractive technique for acquiring 3D data using low-cost equipment, inherent limitations in the methodology have served to limit its practical application, particularly... Read More about An improved photometric stereo through distance estimation and light vector optimization from diffused maxima region.