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The petroleum industry includes the processes of exploration, extraction, refining and transportation. In the areas mentioned above there must be an efficient lighting that provides the minimum lighting levels in the work plane, according with the standards applicable to petroleum facilities, this is accomplished by setting the specifications, methods and technical guidelines which must meet the petroleum...
We propose an original method of Synthesis of COncealment Two-level Texture (SCOTT). SCOTT was designed according to the Human Visual System so that the concealment texture is faithful to the visual environment it will be placed in, in terms of forms and colors. The results of simulation prove that the concealment texture is efficient although it is made of simple forms and only a few colors. Even...
In this paper, we propose a novel online visual tracking algorithm using ensemble color feature. Visual tracking has long been one of the most important topics in computer vision. In recent years, significant progress has been achieved by the state-of-the-art tracking algorithms. However, some challenging problems still remain unsolved. One general problem is that it is difficult for a tracking algorithm...
In this study, a fully automatic vision screening system has been established. The present installation enables the testee to accomplish several vision tests in a self-examination environment, without requiring the assistance of a supervisor or examiner. Included vision tests are far- and near- visual acuity, color vision, stereo vision, contrast vision, and visual field test. Specifically designed...
In this research, a Textual Programming Language (TPL) is used in programming education for primary schoolchildren because of the following reasons: (1) it is more practical to use the programming languages similar to the ones used for developing real applications, (2) typing statements could be easier for primary schoolchildren than generally thought, (3) there exist programming environments such...
The paper is devoted to the problem of information capacity of human-computer interface. The author suggests the new method of calculation for radial basis functions. This method could significantly decrease complexity of calculations. New type of blending functions - blending functions of orthogonal basis is offered. These suggestions allow constructing the model of complex 3D objects in a real time...
This paper details the design of a visual blocks-based tool for editing Python programs. Its purpose is to close the gap between programming using a simplified blocks-based language and textual programming in a mainstream language. As well as helping to guarantee the syntactic validity of programs, the tool aims to reduce the occurrence of run-time errors, a source of learner frustration with dynamic...
Droplet is a programming editor that allows dual-mode editing in blocks and text for any text program. This paper presents observations and improvements to Droplet based on integrating Droplet into Applab, Code.org's JavaScript sandbox learning environment. Droplet's unique interactions with both text and blocks create several unusual problems and opportunities for improvement.
Visual blocks languages offer many advantages to the beginner or "casual" programmer. They eliminate syntax issues, allow the user to work with logical program chunks, provide affordances such as drop-down menus, and leverage the fact that recognition is easier than recall. However, as users gain experience and start creating larger programs, they encounter two inconvenient properties of...
One of the most important tasks in building environment maps with partial information is to find a good alignment between pairs of point clouds representing consecutive frames. RANSAC and ICP are widely used algorithms to align pairs of frames: the former finds an initial transformation which is refined by the latter. Decreasing the alignment error in the first step can reduce the computational cost...
Color histogram is an important visual cue for tracking targets of interest in video sequences. However, tracking using color is prone to errors due to: (i) background clutter (neighborhood regions having similar appearance with the target) and/or (ii) the target enters a shadowy areas. To overcome these two limitations; a tracker combining color and foreground mask is presented in this paper. The...
A system of artificial vision (SVA) is presented, which measures the color of a cosmetic product in the RGB coordinates. The results obtained by the SVA, were compared against the sensory evaluation of color discrimination, by an untrained panel, using statistical analysis. It was found that the SVA is able to discriminate the color of the product as equivalent to the average customer. Then, the RGB...
Sufficient colour contrast between text and background is necessary for the text to be readable. WCAG2.0 defines contrast guidelines that ensure web pages can be read by people with a visual acuity of as low as 20/80. However, the WCAG2.0 specification is hard to understand for web-designers and they often perform colour checks after the design is finished using colour contrast calculators. It is...
In this paper the characteristics of the attentional mechanisms in the human brain are analyzed and the P300 component is stimulated using the three basic colors (RGB) and yellow. To define the effect of the color intensity on the human attention, all these colors are tested for two levels of intensity (High-Low). Healthy youth are involved in this study with normal or corrected to normal vision and...
The need to know the exact placement of a certain sensor or smart meter in a network is indispensable for all sorts of applications. From the network operator's enterprise application down to local control applications using real-time measurements for active integration of renewables. Available data from the communication systems of these metering systems, as well as measurements from these sensors...
Linguistic word nets usually focus on the semantic content and content relations of nouns while not taking into account to what degree those nouns can also reflect visual impressions in a user specific manner. Recently Color Design SNS like COLOURlovers or Adobe Color CC have gained popularity and the huge corpus of available data allows for gaining new insights into the way user associate color designs...
Interest in the area of collaborative Unmanned Aerial Vehicles (UAVs) in a Multi-Agent System is growing to compliment the strengths and weaknesses of the human-machine relationship. To achieve effective management of multiple heterogeneous UAVs, the status model of the agents must be communicated to each other. This paper presents the effects on operator Cognitive Workload (CW), Situation Awareness...
Most LED visual stimulators used in steady state visual evoked potential (SSVEP) brain-computer interface (BCI) use single LED sources to elicit SSVEP responses. In this study, we tested the hypothesis that different orientations would have different responses in different participants and aimed to develop a portable LED based stimulus design which consists of a small number of RGB LEDs arranged in...
When analysing software metrics, users find that visualisation tools lack support for (1) the detection of patterns within metrics; and (2) enabling analysis of software corpora. In this paper we present Explora, a visualisation tool designed for the simultaneous analysis of multiple metrics of systems in software corpora. Explora incorporates a novel lightweight visualisation technique called PolyGrid...
Work processes involving dozens or hundreds of collaborators are complex and difficult to manage. Problems within the process may have severe organizational and financial consequences. Visualization helps monitor and analyze those processes. In this paper, we study the development of large software systems as an example of a complex work process. We introduce Developer Rivers, a timeline-based visualization...
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