We consider the problem of defining and evaluating the distance between three–dimensional pattern P [1..m, 1..m, 1..m] of voxels and three–dimensional volume V [1..n, 1..n, 1..n] of voxels when also rotations of P are allowed. In particular, we are interested in finding the orientation and location of P with respect of V that gives the minimum distance. We consider several distance measures. Ou...

3D terrain data have been used for various systems such as navigation and landscape analysis systems. Recently, the number of 3D terrain data and databases is increasing rapidly. To handle these data effective, such systems need the ability to search 3D terrains to find matches based on shape similarity. In this paper, we propose a pattern matching technique for searching similar terrain segmen...

We describe a system that is being used to segment gray matter from volumetric representations of the human cortex obtained using magnetic resonance imaging. The segmentation algorithm identi es gray matter voxels and computes their connectivity. The method di ers from existing schemes in that it exploits knowledge of the anatomy of human cortex and produces anatomically consistent segmentation...

How quickly can information about the neural response to a visual stimulus be detected in the hemodynamic response measured using fMRI? Multi-voxel pattern analysis (MVPA) uses pattern classification to detect subtle stimulus-specific information from patterns of responses among voxels, including information that cannot be detected in the average response across a given brain region. Here we us...

conclusion no significant differences were found among observers or voxel sizes, with high az results reported for all groups. results no significant differences were found among observers or voxel sizes, with high average z (az) results being reported for all groups. both intra- and inter-observer agreement values were relatively better for 3d accuitomo 170 images than the images from newtom 3...

Recent behavioral evidence indicates a key role for intent in moral judgments of harmful acts (e.g. assault) but not impure acts (e.g. incest). We tested whether the neural responses in regions for mental state reasoning, including the right temporoparietal junction (RTPJ), are greater when people evaluate harmful vs impure violations. In addition, using multivoxel pattern analysis, we investig...

The existing 3D deep learning methods adopt either individual point-based features or local-neighboring voxel-based features, and demonstrate great potential for processing data. However, the models are inefficient due to unordered nature of point clouds suffer from large information loss. Motivated by success recent point-voxel representation, such as PVCNN DRINet, we propose a new convolution...

Recent advances on 3D object detection heavily rely how the data are represented, i.e., voxel-based or point-based representation. Many existing high performance detectors because this structure can better retain precise point positions. Nevertheless, point-level features lead to computation overheads due unordered storage. In contrast, is suited for feature extraction but often yields lower ac...

Registration between voxel images of human anatomy enables cross-patient diagnosis and post-treatment analysis. However, innate variations in the shape, size, and density of non-pathological anatomical structures between individuals make accurate registration difficult. Characterization of such normal but inherent variations provides guidance for registration.We extracted the pattern of normal ...