conclusions the designed software was able to detect a significant number of dentin caries and acceptable measuring of the depth of carious lesions in enamel and dentin. however, the software had limited ability in detecting enamel lesions. background radiographs, adjunct to clinical examination are always valuable complementary methods for dental caries detection. recently, progressing in digi...

This paper presents a new approach to computing dense depth and motion estimates from multiple images. Rather than computing a single depth or motion map from such a collection, we associate motion or depth estimates with each image in the collection (or at least some subset of the images). This has the advantage that the depth or motion of regions occluded in one image will still be represente...

Cameras that can acquire a continuous stream of depth images are now commonly available, for instance the Microsoft Kinect. It may seem that one should be able to stream these depth videos using standard video codecs, such as VP8 or H.264. However, the quality degrades considerably as the compression algorithms are geared towards standard three-channel (8-bit) colour video, whereas depth videos...

Light field rendering has been proposed to render novel images from a collection of captured images without explicit geometry information. In this report, we present an optical analysis of light field rendering. In particular, a light field rendering system can be considered as a virtual imaging system with a discrete synthetic aperture (e.g., [10]. We define the key elements of the virtual ima...

In recent years real time active 3D range cameras based on time-of-flight technology using the Photonic-Mixer-Device (PMD) have been developed. Those cameras produce sequences of low-resolution depth images at frame rates comparable to regular video cameras. Hence, spatial resolution is traded against temporal resolution compared to standard laser scanning techniques. In this work an algorithm ...

The conjugacy of saccades is rapidly modified if the images are made unequal for the two eyes. Disconjugacy persists even in the absence of disparity which indicates learning. Binocular visual disparity is a major cue to depth and is believed to drive the disconjugacy of saccades to aniseikonic images. The goal of the present study was to test whether monocular depth cues can also influence the...

High-quality depth map generation is a key component of free-viewpoint video (FVV), because the virtual view-point images used for FVV are synthesized from real multi-view images and their depth maps. However, synthesized images do not guarantee good quality if the depth maps are inaccurate. Many studies have been conducted to develop methods for generating accurate depth maps. A semi-automatic...

Variations in blur are present in retinal images of scenes containing objects at multiple depth planes. Here we examine whether neural representations of image blur can be recalibrated as a function of depth. Participants were exposed to textured images whose blur changed with depth in a novel manner. For one group of participants, image blur increased as the images moved closer; for the other ...

Light field images present a rich, compact, dataset of multiple images of a scene from slightly shifted viewpoints. I explore the use of an optical flow algorithm on light field images to estimate depth. The optical flow algorithm is simple to implement as does not require finding correspondences between images. Further, I explore the use of image priors and modern optimization techniques to fo...

The existing CCD-camera based systems for fall detection require time for installation and camera calibration. They do not preserve the privacy adequately and are unable to operate in low lighting conditions. In this paper we show how to achieve automatic fall detection using only depth images. The point cloud corresponding to floor is delineated automatically using v-disparity images and Hough...