We illustrate how to consider a network of cameras as a single generalized camera in a framework proposed by Nayar [13]. We derive the discrete structure from motion equations for generalized cameras, and illustrate the corollaries to the epi-polar geometry. This formal mechanism allows one to use a network of cameras as if they were a single imaging device, even when they do not share a common...

BACKGROUND/OBJECTIVE Panoramic radiography has a great place among imaging techniques because of its enormous advantages. One of the characteristics of an ideal imaging technique is to supply precise measurement. The purpose of the current study was to evaluate the accuracy of linear measurements of the jaws on panoramic radiographs. PATIENTS AND METHODS In this study, the vertical distances ...

In this paper the development of system-level optical models that can be used e.g. for simulating entire laser projection systems is presented. After a short motivation ray optics as the simplest theory of optics is introduced. For the general case of tracing non-meridional rays in 3-D space the vector forms of the law of refraction and the law of reflection are provided, which lend themselves ...

We present a system for the interactive navigation through high-resolution cylindrical panoramas. The system is based on MPEG-4 and describes the virtual world by the scene description language BIFS. This allows the easy integration of dynamic video objects, 3-D computer models, interactive scene elements, or spatial audio in order to create realistic environments. For the acquisition of panora...

Recently, multi-screen projection systems are widely used in the field of virtual reality. Within the system bounded by screens, users can view the panoramic stereoscopic images projected onto the screens. In such an immersive environment, however, just one viewer can feel the natural depth sensation. In this paper, the authors propose a novel approach to realize a multi-user system, in which s...

AbstractRecently, there has been growing attention on an end-to-end deep learning-based stitching model. However, the most challenging point in is to obtain pairs of input images with a narrow field view and ground truth wide captured from real-world scenes. To overcome this difficulty, we develop weakly-supervised learning mechanism train model without requiring genuine images. In addition, pr...

BACKGROUND The relationship between impacted mandibular third molar and mandibular canal is important for removal of this tooth. Panoramic radiography is one of the commonly used diagnostic tools for evaluating the relationship of these two structures. OBJECTIVES To evaluate the accuracy of panoramic radiographic findings in predicting direct contact between mandibular canal and impacted thir...

introduction: the use of panoramic radiography has shown a remarkable expansion over the past 20 years. accurate positioning and preparation of patients is needed to avoid image distortion. the aim of this study was to evaluate the common errors on panoramic radiographs taken in the radiology department of rasht dental school. materials and methods: the study sample included 390 digital panoram...

INTRODUCTION This in vivo study assessed accuracy and reliability of tooth length measurements obtained from conventional panoramic radiographs and CBCT panoramic reconstructions to that of a digital caliper (gold standard). METHODS The sample consisted of subjects who had CBCT and conventional panoramic radiographic imaging and who required maxillary premolar extraction for routine orthodont...

Spherical imaging is a technical approach of collecting scenery by viewing it through a single perspective. A typical realization of spherical imaging is a panoramic mosaic covering a part of the hemisphere. According to a photogrammetric definition, we introduce here, spherical imaging is an exact central projection explicitly determined by its projection center. They are linear images without...