In omnidirectional cameras, straight lines are projected onto curves called line-images. The shape of these curves is strongly dependent of the particular camera configuration. The great diversity of omnidirectional camera systems makes harder the line-image extraction in a general way. Therefore, it is difficult to design uncalibrated general approaches, and existing methods to extract lines i...

this paper presents a new methodology for the automated inspection of pipes. standard inspection systems are based on closed-circuit television cameras which are mounted on remotely controlled robots and connected to remote video recording devices. the main problems of such camera-based inspection systems are: 1) the lack of visibility in the interior of the pipes and 2) the poor quality of the...

introduction: the conventional method of teaching endodontics has some drawbacks. due to the small size of the oral cavity, students cannot closely observe the clinical procedure. use of new teaching modalities such as the intraoral camera may obviate this problem. this study assessed the effect of video-assisted clinical instruction in dentistry (vacid) on dental student’s knowledge and perfor...