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Three-dimensional X-Ray Micromotomography (3D μCT) has become an important tool to investigate bone morphology. Several investigators have searched a standard method for determining the optimal threshold value (optimal TH) to segment microtomographic images and quantify the bone morphology. The Conventional methods are based on subjective methods, and it is possible to obtain under or overestimated...
In this study, we aim at reconstructing single photon emission computed tomography (SPECT) images using a Bayesian framework to incorporate anatomical information from magnetic resonance (MR) as a priori knowledge about the activity distribution. This is achieved using an anatomically-driven Bowsher prior (BP). Standard BP has the potential to obtain similar results as other state-of-the-art prior...
This contribution presents a method for automatic detection of excitatory, asymmetric synapses and segmentation of synaptic junctional complexes in stacks of serial electron microscopy images with nearly isotropic resolution. The method uses a Random Forest classifier in the space of generic image features, computed directly in the 3D neighborhoods of each pixel, and an additional step of interactive...
This paper presents a geodesic voting method to segment tree structures, such as cardiac or cerebral blood vessels. Many authors have used minimal cost paths, or similarly geodesics relative to a weight potential P, to find a vessel between two end points. Our goal focuses on the use of a set of such geodesic paths for finding a tubular tree structure, using minimal interaction. This work adapts the...
In fluoroscopic tracking for fractured femur bone fixation, a precise identification of the femoral head provides valuable guidance for positioning the implant instruments such as nails and screws. Noise, occlusions and weak edges challenge the task of automatically segmenting the femoral head. In this paper, a fast and fully automated method to precisely delineate the femoral head in fluoroscopic...
While basic principles of microtubule organization are well understood, much remains to be learned about the extent and significance of variation in that organization among cell types and conditions. Large numbers of images of microtubule distributions for many cell types can be readily obtained by high throughput fluorescence microscopy but direct estimation of the parameters underlying the organization...
In this paper, we propose a method for fast generating a digital hologram using General-Purpose Computation on Graphics Processing Units (GPGPU). This method can reduce the computational time of generating a digital hologram by using the parallel processing with CUDA. And we demonstrate the effectiveness of our algorithm through a variety of experiment.
In this paper, LBP and its variant were tested on Family Face Database which was constructed in the earlier work by the author [1] in the framework of personal image management system. The combination of LBP and other features were also tested for comparison. In addition, several illumination normalizing methods, dissimilarity measures and sub-block divisions were also tested in our framework.
The connectivity of pore is main factor which affect the permeability of coal seam. In this paper, we perform an experiment on the pore structure in blind coal sample and lean coal sample, a non-destructive inspection equipment “micro CT experimental system” is used to scan coal samples, the least scanning unit resolution of the system is 0.5 μm. Based on the micro-CT images, the 3D digital sample...
3DTV promises to become the mainstream of next-generation TV systems. High resolution 3DTV provides users with a vivid watching experience. Moreover, free-viewpoint view synthesis (FVVS) extends the common two-view stereo 3D vision into virtual reality by generating unlimited views from any desired view point. In the next-generation 3DTV systems, the set-top box (STB) SoC requires both a high-definition...
Fuzzy logic and fuzzy set theory can be interesting tools for engineers when solving image processing problems. They provide a mathematical model for approximate reasoning, which mimics human reasoning and therefore can be very powerfull. In this paper we review the basic concepts of fuzzy logic and fuzzy set theory, and use these tools for the construction of a filter for random impulse noise removal...
Low-cost 3D image capture devices are enabling new applications in the gaming, robotics, automotive and surveillance industries. A number of approaches are competing for a share of these markets. Stereoscopic cameras employ intensive image processing to interpret distance from the correlation of two separate image streams [1], structured light systems analyse the deformation of pat terned light projected...
Conventional cameras capture 2D photographs at a single plane of focus. Acquisition of a 3D photograph with multiple planes of focus typically requires scanning the focus of a single camera, or using arrays of cameras or lenses. This paper demonstrates a 150kpixel image sensor, which captures 3D scenes. The chip is manufactured in commodity 0.18μm CMOS and requires only a single convex lens at a fixed...
In this paper, a new approach for computing different anatomical regions in dental Computed Tomography (CT) is presented. The approach consists of two steps. First, a HU threshold window sets to separate between different regions upon their gray-level values; second, a set of objects are generated and texture descriptors are calculated for selected windows from the image data sample. Finally, identification...
In this paper a visual self-localization method for a humanoid robot is presented. This one is based on monocular information. The goal of this method is to obtain the position (x; y) and orientation θ of the humanoid robot inside the field of play. The methods proposed include some digital image processing algorithms and geometric interpretation to perform a 3D monocular reconstruction, that allows...
We demonstrate an optofluidic microscopy scheme which can acquire stereo images, utilizing different angles of illumination for projection imaging with our sub-pixel resolving optofluidic microscope.
Although the technology has only reached the proof-of-concept stage, new 3DTV sets have already introduced the concept of converting 2D video and image content for 3D viewing. Given that the key differentiator and ultimate success factor is visual quality, it requires advancing from the objective of generating an acceptable stereo pair from a monoscopic source to generating a robust conversion of...
As the use of 3D multimedia contents has been popularized recently, next generation mobile devices are also expected to support the 3D contents. For displaying images on small-sized display panels of mobile devices, content-aware image retargeting has attracted a lot of interest due to its small quality loss of important contents in the images. In this paper, we present a novel content-aware 3D image...
We present an algorithm to estimate 3D depth from a single monocular outdoor image based on the multiresolution analysis of the various cues including edge, hue, saturation, vertical depth prior, and dark channel prior. Our experimental results show a huge amount of computational savings over literature work while keeping our depth map close to the ground truth.
In this paper we propose a low complexity algorithm to generate 3D image depth map in good quality based on a single 2D image for stereo applications. Owing to the different characteristics of images, the 2-D images are first classified into three categories and then processed by the proposed low complexity techniques to generate the depth map. With good quality in the generated depth map, we achieve...
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