3 research outputs found
A systems-engineering approach for virtual/real analysis and validation of an automated greenhouse irrigation system
In the context of multidisciplinary complex systems design, modelling and simulation are key components in decision making. It allow engineers to validate design alternatives at early development stages. Consequently, it is possible to reduce uncertainty on requirements compliance and secure better decisions for downstream stages of product development. This article describes the analysis of a virtual prototype of an automated greenhouse irrigation system. It is modelled and compared with the real system implementation, finding some differences and similarities between both system testing approaches. The intrinsic dependence of experimentation and modelling is also discussed as both, experimental and random data, are important to be used as inputs to validate virtual models
No-reference image and video quality assessment: a classification and review of recent approaches
The field of perceptual quality assessment has gone through a wide range of
developments and it is still growing. In particular, the area of no-reference
(NR) image and video quality assessment has progressed rapidly during the last
decade. In this article, we present a classification and review of latest
published research work in the area of NR image and video quality assessment.
The NR methods of visual quality assessment considered for review are
structured into categories and subcategories based on the types of
methodologies used for the underlying processing employed for quality
estimation. Overall, the classification has been done into three categories,
namely, pixel-based methods, bitstream-based methods, and hybrid methods of the
aforementioned two categories. We believe that the review presented in this
article will be helpful for practitioners as well as for researchers to keep
abreast of the recent developments in the area of NR image and video quality
assessment. This article can be used for various purposes such as gaining a
structured overview of the field and to carry out performance comparisons for
the state-of-the-art methods