摘要:
A method for generating information regarding a 3D object from at least one 2D projection thereof. The method includes providing at least one 2D projection (40) of a 3D object, generating an array of numbers (50, 60) described by: aijk = vi'bik - vj''ajk (i,j,k = 1,2,3), where ajk and bjk are elements of matrices A and B respectively and vi' and vi'' are elements of vectors v' and v'' respectively, wherein the matrices (50) and vectors (60) together describe camera parameters of three views (102) of the 3D object and employing the array to generate information regarding the 3D object (70).
摘要:
A flow monitoring device (26) for monitoring mud flow in a return line (25) of a bore hole drilling operation, including a mounting bracket (32) mounted to the return line (25) with a viewing port (36) for access to an interior of the return line. A light source illuminates (42), through the viewing port, a portion of the mud flow in an observation zone within the return line. A camera (44) creates a plurality of images of the mud flow in the observation zone. A controller (46) is configured to analyze the plurality images to: determine a level of the mud flow in the return line and the presence of at least one irregularity, track a movement of the irregularity across the plurality of images to determine a rate of movement of the irregularity, and calculate a flow rate of the mud flow through the return line based on the movement rate and the determined level.
摘要:
A process includes acquiring radar images on the same area, calculating a vector of n amplitude or intensity values relating to a sample pixel in the n images available, identifying the vector as a sample vector, and defining an estimation window for the sample pixel for identifying a set of pixels around the sample pixel. Additionally, calculating vectors of N amplitude or intensity values for each pixel contained in the estimation window, comparing each vector with the sample vector, identifying pixels associated with the vectors that have passed a statistical test and identifying pixels associated with the vectors that have not passed the statistical test, eliminating the pixels contained in the estimation window that are not connected to the sample pixel, and identifying the set of pixels that are statistically homogeneous with the sample pixel.
摘要:
A seismic modeling system may include a seismic model data storage device, and a processor cooperating with the seismic model data storage device to determine a first 3D boundary around a suspect region within a first seismic model spatial domain data set for a geological formation at a first time, and determine a second 3D boundary around the suspect region within a second seismic model spatial domain data set for the geological formation at a second time and after movement of the suspect region. The processor may also compare the second 3D boundary to the first 3D boundary to determine an overlapping portion where the first and second 3D boundary regions overlap, and at least one non-overlapping portion where the first and second 3D boundaries do not overlap, and inpaint the overlapping portion based upon the at least one non-overlapping portion.
摘要:
The invention relates to a method for colourising a three-dimensional point cloud, wherein the method comprises: With a surveying instrument, surveying a point cloud of a setting, wherein each point of said point cloud is characterised by coordinates within an instrument coordinate system, which has an instrument centre as origin. With a first camera, capturing a first image of the setting, wherein each pixel value of the first image is assigned to coordinates within a first camera coordinate system, which has a first projection centre as origin, wherein the first projection centre has first parallax shift relative to the instrument centre. With a computer comprised by the surveying instrument: Transforming the point cloud from the instrument coordinate system into the first camera coordinate system, resulting in a first transformed point cloud. Within the first transformed point cloud, detecting one or more uncovered points, which are openly visible from the perspective of the first projection centre. To each uncovered point in the first transformed point cloud, assigning a pixel value, which has corresponding coordinates in the first camera coordinate system.
摘要:
Automatic characterization or categorization of portions of an input multispectral image based on a selected reference multispectral image. Sets (e.g., vectors) of radiometric descriptors of pixels of each component of a hierarchical representation of the input multispectral image can be collectively manipulated to obtain a set of radiometric descriptors for the component. Each component can be labeled as a (e.g., relatively) positive or negative instance of at least one reference multispectral image (e.g., mining materials, crops, etc.) through a comparison of the set of radiometric descriptors of the component and a set of radiometric descriptors for the reference multispectral image. Pixels may be labeled (e.g., via color, pattern, etc.) as positive or negative instances of the land use or type of the reference multispectral image in a resultant image based on components within which the pixels are found.
摘要:
Feature extraction of image data using feature extraction modules. The feature extraction modules may be provided in an architecture that allows for modular, decoupled generation and/or operation of the feature extraction modules to generate feature data corresponding to image data. In this regard, the feature extraction modules may communicate with a file system storing image data and feature data by way of a common interface format. Accordingly, regardless of the nature of the execution of the feature extraction module, each feature extraction module may be communicative by way of the common interface format, thereby providing a modular approach that is highly scalable, flexible, and adaptive.
摘要:
Method for classifying a two- or higher dimensional image, where each pixel is associated with M property measures, includes identifying firstly a certain predetermined, variable geometric structure, the extension of which in at least two of the N dimensions in the dataset is determined in relation to a single element in the dataset and by at least one variable parameter, and secondly at least one geometric measure associated with the variable geometric structure, which geometric measure is arranged to measure a geometric property of a specific geometric structure in relation to other specific such geometric structures, and in that a main classification is conducted of the dataset, which main classification is based upon a comparative measure between the respective sets of associated geometric measures of two elements, calculated from a respective maximal geometric structure for each element.
摘要:
A method for navigation comprises constructing a current map that includes two-dimensional or three dimensional representations of an area, detecting one or more edge features on the current map, and generating a first fine-edge map based on the edge features. The method further comprises retrieving a historical map that includes two-dimensional or three dimensional representations of the area, detecting one or more edge features on the historical map, and generating a second fine-edge map based on the edge features. Thereafter, a coarse version of the current map is generated from the first fine-edge map, and a coarse version of the historical map is generated from the second fine-edge map. The coarse versions of the current and historical maps are then correlated to determine a first position and orientation. The first fine-edge map is then correlated with the second fine-edge map to determine a second, more accurate, position and orientation.