Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 38 for “"depth map"”.
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Depth map recovery from videos
The depth map of a video is a very important piece of information. Recovering the depth map of a video expands a 2D video into its 3rd dimension, and creates new possibilities, such as, object insertion, conversion to 3D, shallow depth of field simulation. In this work, we introduce our approach of …
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Fuzzy Filters for depth map smoothing
… with the extraction of dense three-dimensional depth maps from sequences of two-dimensional greyscale images using correlation based matching. In particular the thesis is focused on the noise processes that occur in the depth map and the removal of that noise using nonlinear filters based on …
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Terrain Aided Navigation for Autonomous Underwater Vehicles with Local Gaussian Processes
… for an AUV where, with the help of a prior depth map, the AUV localizes itself using altitude measurements from a multibeam DVL. The AUV simultaneously builds a probabilistic depth map of the seafloor as it moves to unmapped locations. The main contribution of this thesis is a new, scalable, …
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Multi-view image refocusing
… To achieve the focusing job, it requires shallow depth of field to create a focus-defocus scene, which depends on larger size of lens aperture. In our project, we simulate a larger camera lens aperture by using several photos taken from slightly different viewpoints. Based on these images, a layer …
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Real-time monocular depth mapping system using variance of focal plane and pixel focus measure
… most important sensory skills creatures have is depth perception, which allows them to estimate the relative distance of objects in their vision from many visual cues. Many systems have been developed to aid machines in perceiving the depth map of their environment, and each system has its …
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Stereo vision based on compressed feature correlation and graph cut
… to validate correlation outputs. The sparse depth map generated by this ultra-fast Compressed Feature Correlation may either serve as inputs to global methods or be interpolated into dense depth map when object boundaries are clearly defined. The second module enables a modified graph cut …
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Data-driven depth and 3D architectural layout estimation of an interior environment from monocular panoramic input
… either visual data alone or sparse registered depth information. The appeal of this setup lies in the efficiency and cost-effectiveness of data acquisition using 360o images. The challenge, however, is that creating a comprehensive model from mostly visual input is extremely difficult, due to …
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Image-based 3D metrology of non-collaborative surfaces
… high spatial frequencies of photometric stereo depth map with the low frequencies of photogrammetric depth map in frequency domain to produce accurate low frequencies while retaining high frequencies. For the third approach, we utilize light directionality to improve texture quality by …
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A Novel Image Retrieval Strategy Based on VPD and Depth with Pre-Processing
… restoration, color features extraction, and depth feature extraction. We propose a visual perceptual descriptor (VPD) to extract color features from an image. Gradient direction is calculated at each pixel, and the VPD is moved over the entire image to locate regions with similar gradient …
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High-speed optics based depth mapping for automated active safety system
… standalone system capable of providing real-time depth map for automated emergency brake systems in cars.
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Automatic 2D-to-3D conversion of single low depth-of-field images
… disparity image pairs from single 2D low depth-of-field (LDOF) images. Initially a depth map is produced through the assignment of depth to every delineated object and region in the image. Subsequently the left and right disparity images are produced through depth imagebased rendering …
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"""Travelling Without Moving"": A Study on the Reconstruction, Compression, and Rendering of Three-Dimensional Environments for Telepresence"
… planar arrays of cameras and generates dense depth maps with multiple values per pixel. Second, we introduce a novel codec for the static depth-image-based representation, which jointly estimates and encodes the unknown depth map from multiple views using a novel rate-distortion optimization …
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Three dimensional moving pictures with a single imager and microfluidic lens
… movie acquisition and corresponding depth data is commonly generated from multiple cameras and multiple views. This technology has high cost and large size which are limitations for medical devices, military surveillance and current consumer products such as small camcorders and cell …
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Surfaces From Stereo: An Integrated Approach
… interpolate to obtain a complete distance or depth map. Traditionally, the most difficult problem has been to correctly match the corresponding features. Also, occluding and ridge contours (depth and orientation discontinuities) have not been explicitly detected and this has made surface …
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Single view object completion
… reconstruction of a 3d object from a single depth image observation. Much effort has been put on multi-view reconstruction of objects with substantial success, but single view recon- struction is still very limited. Initial methods produce only partial reconstructions by projecting a depth …
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Consistent Depth Estimation in Data-Driven Simulation for Autonomous Driving
In this work we propose consistent depth estimation for viewpoint reconstruction in data-driven simulation, combining aspects of learning-based monocular depth prediction and structure-from-motion to increase temporal video depth accuracy. We demonstrate efficacy in VISTA, an end-to-end autonomous …
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Aural imaging from 3D vision
Dense stereo maps have many useful applications in computer vision. They can help in performing such tasks as background separation, segmentation, and object recognition. Despite the continued exponential advances in the computational capacity of microprocessors, current personal computers are …
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Algorithms for 3D time-of-flight imaging
… for the measurement process and underlying scene depth map sparsity to accurately extend the unambiguous depth range of the camera. This joint processing results in improved performance over separate unwrapping and denoising steps.
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Environment Mapping in Larger Spaces
Spatial mapping or environment mapping is the process of exploring a real world environment and creating its digital representation. To create convincing mixed reality programs, an environment mapping device must be able to detect a user's position and map the user's environment. Currently …
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Image restoration from noisy and limited measurements with applications in 3D imaging
… and applied for 3D model reconstruction with a depth camera, which is a recently introduced device with many potential applications in 3D imaging and human-machine interaction. Currently, the depth camera is limited in resolution and suffers from complex types of noise. In the proposed method, …
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