Scale Space Surface Recovery using Binocular Shading and Stereo Information
نویسندگان
چکیده
Shape-from-shading algorithms that use a single image often find incorrect solutions because of ambiguity in the image shading. We describe a robust shape-from-shading algorithm using scale space tracking that can resolve most of these ambiguities by using two images taken from slightly different positions. Further improvements are obtained by combining stereo with shape-fromshading. Results are shown for synthetic test images (with and without added noise) for a Scanning Electron Microscope stereo pair, and for a stereo pair taken using a video camera.
منابع مشابه
Integrating Stereo with Shape-from-Shading derived Orientation Information
Binocular stereo has been extensively studied for extracting the shape of a scene. The challenge is in matching features between two images of a scene; this is the correspondence problem. Shape from shading (SfS) is another method of extracting shape. This models the interaction of light with the scene surface(s) for a single image. These two methods are very different; stereo uses surface feat...
متن کاملShading Based 3D Shape Recovery in the Presence of Shadows
Shadows usually cause various problems in three-dimensional shape recovery and measurement methods. In particular shading based approaches such as shape-from-shading or the photometric stereo method produce no or wrong results if the shadows are not treated appropriately. We show how information extracted from shadows can be employed to reduce the problems caused by them. This is done for multi...
متن کاملBinocular Photometric Stereo
This paper considers the problem of computing scene depth from a stereo pair of cameras under a sequence of illumination directions. By integrating parallax and shading cues, we obtain both metric depth and fine surface details. Casting this problem into the filter flow framework [16], enables a convex formulation of the problem, and thus a globally optimal solution. We demonstrate high quality...
متن کاملSolder Joints Detection Method Based on Surface Recovery
Machine vision has been widely used in various industrial productions. However, the study for solder joints detection is not enough. This paper presents a solder joints detection method based on surface recovery. For a single gray-scale image, using shape-from-shading (SFS) technology, the surface of the solder joints is recovered. According to the shape distribution, the quality of solder join...
متن کاملShading-Based Two-View Matching
This paper presents a region-based stereo matching algorithm, in which the regions are computed from the Gaussian (K) and mean (H) curvature information of the image intensity surface. A region is defined as a connected area of constant K/H sign combination, and thus constitutes the footprint of a local section of the intensity surface, whose shape is a peak, a pit, a positive or a negative sad...
متن کامل