230 results about "Stereo imagery" patented technology

The stereo display apparatus displays parallax images to present a stereo image. The apparatus acquires the parallax images and information on a maximum pixel shift amount and a minimum pixel shift amount of the parallax images, calculates maximum and minimum relative parallax amounts corresponding to the maximum and minimum relative parallax amounts, by using the information on the maximum and minimum pixel shift amounts and a display condition, and determines whether or not at least one of the maximum and minimum relative parallax amounts exceeds a fusional limit criterion value. The apparatus determines whether or not a difference between the maximum and minimum relative parallax amounts exceeds a fusional limit range amount if the at least one of the maximum and minimum relative parallax amounts exceeds the fusional limit criterion value.

The invention provides a method and a system for processing high-definition remote sensing image data by applying a rational function model, a satellite image block adjustment and auto-match and distributed parallel processing technology. The method comprises the following steps: analyzing and processing input primary image data and computing parameters of the corresponding rational function model so as to obtain a stereo image pair by applying the computed rational function model; performing measurement and singlechip orientation of a control point and a connecting point on the primary image data, and performing block adjustment processing on an error between stereo image pixel data and the primary image data so as to improve the fit precision between the stereo image pixel data and the primary image data; generating an image similar to an epipolar ray, defining a matching template, measuring matched seed points and lines, performing automatic image matching and generating a digital elevation model; and respectively generating a digital orthophoto map and a digital line graph, and finishing manufacturing a product by applying the obtained data.

A stereoscopic video display apparatus includes: a two-dimensional display unit which selects, for each of parallax images having a parallax from a reference parallax image, at least one pixel sequence on a panel, and displays each of the parallax images using the selected pixel sequence; a barrier part which divides light from the pixel sequences such that the respective parallax images are displayed at predetermined positions; a position detecting unit which detects the positions of viewers; and a parallax image arrangement control unit which specifies viewing positions possible for the left eyes of the viewers from among the detected viewing positions other than the viewing positions for the right eyes, and cause the two-dimensional display unit to respectively display the parallax images predetermined for the left eyes at the specified positions.

To make it possible to stably provide a stereoscopic image which can be viewed by each viewer in the state where the stereoscopic effect and the sense of reality are maximized. Left eye and right eye images (images for measurement), the parallax between which is continuously or stepwise changed, are outputted beforehand to a stereoscopic image display device, and the face of the viewer viewing the images for measurement is photographed. The pupil width of the photographed viewer is measured, and based on the state of the change in the pupil width, the fusion limit of the viewer is measured and registered. In the case where a stereoscopic image for appreciation is displayed, the stereoscopic image is outputted by controlling the parallax of the stereoscopic image so as to prevent the parallax from exceeding the fusion limit of the viewer, which is measured beforehand.

The invention relates to a remote sensing image road extracting method based on stereo constraint, which comprises the following steps: extracting and refining the edge of the left image of a stereo pair, thereby obtaining a binary image of the single pixel edge; carrying out shape constraint and vectorization on the binary image of the single pixel edge by using an improved phase grouping method; carrying out edge line node matching on the basis of grey scale correlations, thereby determining the homonymous image point of the edge line node on the right image; resolving node elevation on the basis of an image pair RPC model parameter or interior/exterior orientation element forward intersection method; and determining the road extraction result on the basis of the road edge line constrained by the node elevation. Starting with the stereo image, the invention extracts the elevation information of the road edge line, which is obtained after edge extraction, refining, shape constraint and vectorization, and establishes a model by which the branch nodes of the candidate road edge lines can be matched and the elevation information can be acquired by carrying out forward intersection on the homonymous point information; and according to the elevation characteristic of the road, the invention establishes elevation constraint conditions, carries out elevation constraint, and extracts satisfactory road edge lines from the candidate road edge lines, thereby realizing quick automatic extraction of road thematic information on the remote sensing image.

The invention discloses a road survey and design method based on a high-resolution satellite image, which comprises the following steps: A, determining a scope to be covered by a satellite image according to a route scheme, selecting a high-resolution satellite and a sensor for collection, and designing and collecting three-dimensional images of the high-resolution satellite; B, when a scale of 1 to 2,000 is formed, laying and measuring field ground control points and laying control points along the route; C, generating a digital ground model, a digital orthophotomap and a digital line topographic map for the road route area through area adjustment of the three-dimensional images of the high-resolution satellite based on rational polynomial parameters of the images of the high-resolution satellite; and D, calculating engineering quantities and generating route design drawings and tables through measurement of the high-resolution satellite and collaborative design of the road CAD. The invention realizes the measurement of the high-resolution satellite and the collaborative design of the road CAD, thereby greatly reducing the field workload, shortening the survey and design period, and producing significant economic and social benefits.

A method for rigorously reshaping a pair of overlapping digital images using a Digital Photogrammetric Workstation (DPW) is disclosed. The overlapping images are imported into the DPW as a pair of originally distorted images having an associated sensor model. The original images are triangulated to adjust sensor parameters. Orthophotos are created with a flat digital terrain matrix (DTM) to leave terrain displacements within themselves, and according to a sensor model and formula for exact projective computations. The orthophotos are aligned by rotation, and interior orientation coordinates of the equivalent vertical frame images are determined. The orthophotos are imported as a pair of overlapping equivalent vertical frame images according to the interior orientation coordinates. A digital terrain model is generated in the DPW using the overlapping equivalent vertical frame images. Another orthophoto is produced using the digital terrain model to remove the measured terrain displacements. In an alternative embodiment, the equivalent vertical frame images are aligned by using the classical pair-wise rectification method or by separately rotating each image without aligning the orthophotos by rotation during their creation. In each embodiment, the sensor model of the original distorted images is dissociated from the orthophotos for subsequently greater distribution and usage of the stereo imagery.

A stereoscopic image display device comprises: a display device that displays left-eye image data in a left-eye frame and right-eye image data in a right-eye frame; liquid crystal shutter glasses that alternately open and close a left-eye shutter and a right-eye shutter in synchronization with the display device; and a control circuit that controls the ON duty ratio of a backlight of the display device to a first set value if the luminance of each of the left-eye and right-eye frames is less than a predetermined reference value, and controls the ON duty ratio of the backlight of the display device to a second set value if the luminance of each of the left-eye and right-eye frames is greater than the reference value.

The invention provides a virtual fire-fighting training system, which comprises a backpack type virtual actual combat training system and a backpack type virtual terminal control system. The backpack type virtual actual combat training system is running on a cloud server. The backpack type virtual terminal control system is running on a backpack type terminal. The backpack type virtual actual combat training system, running on the cloud server, comprises a user management module, a training data module, a scene data module, a data management system, a virtual fire-scene environment generation module, a fire-scene fluid AI control module, an equipment interaction effect control module, a multi-person collaborative AI control module, a virtual training scene system and a scene management system. The backpack type virtual terminal control system, running on the backpack type terminal device, comprises a cloud rendering data stream control module, a scene display module, an interaction control module, a binocular stereoscopic image retina projection system, a position collecting module and an action acquisition module.

The invention discloses a 3D lesson preparation and teaching system and method. The system comprises a login module, a lesson operation module, a lesson preparation module, a lesson teaching module, a display module and a processing module, wherein the lesson operation module is used for creating courseware according to lesson parameters, the lesson preparation module is used for carrying out teaching content preparation for the courseware created by the lesson operation module, the lesson teaching module is used for carrying out lesson teaching according to the order of pages of the courseware created by the lesson preparation module, the display module is used for displaying all other modules, and the processing module is used for processing data of all the modules. The invention further discloses a 3D teaching system, and the 3D teaching system comprises interaction equipment, the 3D lesson preparation and teaching system and a cloud server. The invention further discloses the 3D lesson preparation and teaching method. Through the system and the method, interaction between students and the teaching knowledge is enhanced, stereo images of models or 3D videos can be acquired through utilizing virtual-reality stereo glasses, learning interests of the students can be motivated, and the learning effect is improved.

The invention relates to a multi-stereoscopic-image fusion drawing method considering different illumination imaging conditions. The method comprises the following steps: step one, acquiring an existing image of a research area and selecting a multi-coverage stereo image pair; step two, constructing an imaging geometric model of a remote sensing image; step three, carrying out initial matching onthe stereo image pair to obtain same-name points; step four, carrying out stereoscopic image area network beam method adjustment on the imaging geometric model obtained at the step two to obtain a refined imaging geometric model; step five, carrying out dense matching on each group of stereoscopic image pairs to obtain an image-space dense same-name point set of all groups of stereoscopic image pairs; step six, on the basis of the refined imaging geometric model obtained at the step four, carrying out forward intersection on the image-space dense same-name points obtained by the step five to obtain a dense three-dimensional point cloud of the object space, carrying out grid division and interpolation to obtain a DEM, and carrying out DEM fusion to obtain a hole-free DEM; and step seven, according to the hole-free DEM and the refined imaging geometric model, a DOM being an image with geographic information after terrain correction is obtained.

A method and apparatus for generating stereo imagery scenario data to be used to test stereo vision methods such as detection, tracking, classification, steering, collision detection and avoidance methods is provided.

The invention relates to a manufacturing method for a projection digital elevation model capable of changing together with an image, which combines internal-external orientation elements, DEM (Digital Elevation Model) data and DSM (Digital Surface Model) data of the image and generates the digital elevation model corresponding to the image. Through the invention, the positions of the points on the two-dimensional image are in one-to-one correspondence with three dimensional coordinates of the model, so as to accurately obtain real elevation value and horizontal coordinates of the corresponding points. Due to the adoption of the technical scheme provided by the invention, each image can obtain the corresponding surface coordinate and ground coordinate, thereby utilizing orthophoto image for image measuring rather than a stereoscopic image for observation.

A stereoscopic image displaying device enables the stereoscopic view of a stereoscopic cursor to be restored while maintaining the stereoscopic view of a region of interest even in a state where the stereoscopic cursor cannot be viewed stereoscopically. The stereoscopic image displaying device includes a stereoscopic cursor moving unit that moves the stereoscopic cursor in a depth direction and an in-plane direction in response to a movement instruction input; a reference position setting unit in which a reference position in the depth direction and the in-plane direction is set in advance; and a stereoscopic cursor reference position moving unit that moves the stereoscopic cursor moved by the stereoscopic cursor moving unit to the reference position in response to a reference position movement input.

A method of elevation control points extraction assisted by satellite laser altimeter data, which is characterized in that take the waveforms received by satellite and the waveforms simulated from digital surface model (DSM) of image scene reconstruction as input data, and includes two times of waveform matching and combined process of multi-source remote sensing data. The elevation control points could be extracted without the influence of terrain fluctuation or urban buildings for the terrain information of laser spot area has been taken into account. The first time is realized by matching two groups of waveforms from the received and the simulated, and the spatial registrations between locations of laser spots and DSM are realized. The second time is realized by matching two single waveforms from the received and the simulated, and local system errors in DSM of laser spot area could be extracted. With the registration results and local system errors, many applications including extraction of elevation control points could be easily developed. The invention mainly includes the following steps: (1) Preliminary refinement of orientation parameters of high-resolution stereo or InSAR images by free net adjustment; (2) DSM reconstruction with high-resolution stereo images or InSAR data; (3) dividing the received laser altimetry data into groups; (4) Waveform extraction of the receiving group; (5) observation design for simulation waveform group; (6) simulation waveform acquisition through observation of DSM; (7) matching the received group waveforms with the simulated group waveforms; (8) plane position registration between laser spot and DSM; (9) matching each pair of waveforms in group between the received and the simulated respectively; (10) extraction of DSM elevation system errors on each laser spot area; (11) extraction of image elevation control points; (12) refinement of DSM elevation, calibration of satellite laser altimeter sensor, combined processing with laser altimetry and image remote sensing. The invention mainly solves two difficulties. One difficulty is finding footprints, or say laser spot areas, of satellite laser altimeters on stereoscopic images, InSAR images and the DSM they generate. Another difficulty is the accurate elevation extraction of laser spot areas with uneven terrain. The invention can realize the spatial registration between laser spot and DSM or remote sensing in different terrain and establish spatial connection between laser altimetry data and stereo images or InSAR data. In different terrain conditions, by the invention, the satellite laser altimetry data can be used for high-precision elevation control of 3D reconstruction/positioning of stereo images or InSAR data.

The invention discloses an equipment insulation test training system based on VR virtual immersion and circular screen interaction, and the system comprises a holographic subsystem which achieves theautomatic welcoming, hosting and teacher role functions through the photographing and recording of a corresponding teaching video based on a holographic projection technology and a virtual host technology; a theoretical learning and examination subsystem which is used for carrying out real-time examination, online examination, test question management, automatic test paper composition, automatic test paper marking and information query on students; a circular screen interaction three-dimensional simulation subsystem which is based on VR virtual immersion, circular screen projection imaging and3D stereoscopic image watching interaction; and a management subsystem which is used for integrating user management, content management, assessment management and log management into a whole for system management. The problems that an existing training mode is insufficient in virtual immersion degree and not deep in feeling, other students repeatedly make mistakes, and the training effect is notideal are solved.

The invention discloses a stereo-mapping satellite-image-matching suspicious-region automatic detection method. The method comprises the following steps of step1, generating an epipolar-line stereo image pair of a stereo image, wherein the epipolar-line stereo image pair includes a left epipolar-line image and a right epipolar-line image; step2, reading the epipolar-line stereo image pair, and carrying out wavelet transform on the left epipolar-line image and the right epipolar-line image of the epipolar-line stereo image pair respectively so as to establish image pyramids of the left epipolar-line image and the right epipolar-line image; and step3, determining suspicious regions in the left epipolar-line image and the right epipolar-line image of each layer of the image pyramids below a top layer in a layer-by-layer mode. In the invention, high-efficient thick-cloud automatic detection and rejecting can be realized; high-efficient shielding area detection, large-area water area detection and non-texture shadow area detection can be realized; and a good actual application value is possessed.

The invention discloses a stereo server, which is characterized in that the hardcore of the stereo server comprises a main controller, stereo processing software, a memorizer, a multimedia output interface and a pair of aided 3D video glasses. The stereo server can synchronously play or output two or more images, which ensures that a stereo image can be seen through a display screen with stereo displaying function or the 3D video glasses. The multimedia output interface is one or multiple of an analogue signal output interface, the output interface of a digital signal, an infrared interface, a bluetooth interface, a WIFI interface and the Ethernet interface. A stereo cinema server and a full-functional stereo server are disclosed either.