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Monkeypox is an endemic infectious disease commonly observed only in Central Africa; however in the last month, WHO considered it an international outbreak, with several cases described in a short span. Oral surgeons are exposed to patients at risk for monkeypox and some of the most prevalent lesions could be observed first in the maxillofacial region. The knowledge of the common signs and symptoms...
Purpose The aim of this present study is to describe a case of supernumerary nasal tooth removed with a modified maxillary vestibular approach with subperiosteal dissection. Methods Also, a review of English-language literature of supernumerary nasal teeth from 1959 to 2018 was performed. Results This study demonstrated that the modified maxillary approach with subperiosteal intranasal dissection...
The 3D reconstruction can be employed in several areas such as markerless augmented reality, manipulation of interactive virtual objects and to deal with the occlusion of virtual objects by real ones. However, many improvements into the 3D reconstruction pipeline in order to increase its efficiency may still be done. In such context, this paper proposes a filter for optimizing a 3D reconstruction...
Nowadays, underwater maintenance tasks, mostly in the case of oil and gas industries, have been assisted by computer vision algorithms. An important part of these procedures is the rectification of stereo images, which is the first step in the stereo 3D reconstruction pipeline. Some aspects of the underwater environment make the rectification process difficult: it presents a very noisy scenario; and...
In computer vision, gradient-based tracking is usually performed from monochromatic inputs. However, few researches consider the influence of the chosen colorto- grayscale conversion technique. This paper evaluates the impact of these conversion algorithms on tracking and homography calculation results, both being fundamental steps of augmented reality applications. Eighteen color-togreyscale algorithms...
This work proposes a study over five different hand gesture classifiers using depth and skeleton data from the Kinect sensor. Evaluations of sensibility, specificity and computational costs are performed for the purpose of choosing which methods are the most adequate. In spite of the low computational complexity of the tested classifiers, the results obtained are of similar quality compared to other...
In the field of 3D reconstruction there are two main challenging tasks that require careful consideration, namely, feature detection and matching. The corresponding automatic process introduces noise resulting from the image capture and spurious features matching. A number of robust algorithms for hypothesis evaluation have been suggested, they would deal with these limitations by removing outliers...
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