69 results about "Stereoscopic depth" patented technology

A three-dimensional display is provided which can produce a stereoscopic image with a natural stereoscopic depth even on different screen sizes. A stereoscopic video signal generation circuit, which supplies a stereoscopic video signal to the three-dimensional display that forms a stereoscopic image by taking advantage of binocular disparity parallax, comprises: an information retrieving means for retrieving video information on the stereoscopic image and display information on the three-dimensional display; and an offset setting means for offsetting a left-eye image and a right-eye image relative to each other according to the video information and the display information to adjust the stereoscopic depth of the image displayed.

The present invention provides a novel imaging system for obtaining full stereoscopic spherical images of the visual environment surrounding a viewer, 360 degree both horizontally and vertically. Displaying the images obtained by the present system, by means suitable for stereoscopic displaying, gives the viewers the ability to look everywhere around them, as well as up and down, while having stereoscopic depth perception of the images displayed images. The system according to the present invention comprises an array of cameras, wherein the lenses of said cameras are situated on a curved surface, pointing out from common centers of said curved surface. The captured images of said system are arranged and processed to create sets of stereoscopic image pairs, wherein one image of each pair is designated for the observer right eye and the second image to his left eye, thus creating a three dimensional perception.

Teleconferencing is performed between two telecommunication devices having a display device and a stereoscopic pair of cameras positioned outside opposed sides of the display device at the same level partway along those sides. The separation between the centers of the cameras is in a range having a lower limit of 60 mm and an upper limit of 110 mm to improve the perceived roundness in a displayed stereoscopic image of a head. In captured stereo images that are video images, a head is segmented and the segmented backgrounds are replaced by replacement images that have a lower degree of perceived stereoscopic depth to compensate for non-linear depth perception in the displayed stereo images. Images are shifted vertically to position an eye-line of a detected face at the level of the stereoscopic pair of cameras of the telecommunication device where the images are displayed, improving the naturalness of the displayed image.

Provided is a method and apparatus for linear depth mapping. Linear depth mapping includes using algorithms to correct the distorted depth mapping of stereoscopic capture and display systems.

The invention discloses a method for establishing a relation between a scene stereoscopic depth and a vision difference in a binocular stereoscopic vision system. the method comprises the steps of firstly, solving inner parameters, and relative rotary matrixes and translation vectors of left and right cameras; then, analyzing a main error source and an error model of the binocular stereoscopic vision system; then, analyzing influences of the main error on a base line length and the vision difference of the parallel binocular stereoscopic vision system; then, establishing a common relation model of the scene stereoscopic depth and the vision difference in the binocular stereoscopic vision system; obtaining depth information by a laser distance measuring instrument by selecting a certain amount of demarcation points and carrying out demarcation based on a least square method to solve a relation model between the scene stereoscopic depth and the vision difference in the binocular stereoscopic vision system; and finally, solving the vision difference in left and right images through a corresponding fixed matching method so as to realize accurate recovery and three-dimensional reestablishment of the scene stereoscopic depth. The method has the beneficial effect of directly, simply, accurately and extremely improving the accuracy of the stereoscopic depth recovery and the three-dimensional reestablishment.

An electro-optical backlighting panel construction for use in portable computer-based systems having direct and projection viewing modes of operation. In the illustrative embodiments of the present invention, the electro-optical backlighting panel is integrated with a LCD display panel, a micropolarization panel, and a touch-screen writing panel to provide several different types of portable computer-based systems including, for example, a portable notebook computer, a computer-driven image display device, and a portable pen-computing device. In general, each of these computer-based systems are capable of selectively displaying color video images on an actively driven display surface, or projecting such video images onto a wall surface or projection screen. These computer-based systems can be easily reconfigured for projection viewing without any sort of physical modification to the LCD display panel assembly. If desired, these computer-based systems can be used to directly view "spatially-multiplexed" images of 3-D objects or imagery during the direct viewing mode, and when desired these spatially-multiplexed images can be projected onto a wall surface or projection screen during the projection viewing mode. When the spatially-multiplexed images are viewed through electrically-passive polarized glasses, the 3-D object is perceived with stereoscopic depth sensation in either mode of viewing.

Influences of physiological stereoscopic elements are removed by image processing using projection transformation. A horopter-plane image projection unit 311 is designed to project a non-stereo image supplied via a signal line 129 onto a cylindrical plane (horopter plane) including a horopter circle. The size of the horopter circle is specified using, for example, the radius as horopter circle information. Additionally, the relationship with two eyes is specified by the interocular distance. A display surface right-eye projection unit 316 is designed to project an image projected on the horopter plane onto a display surface for the right eye. A display surface left-eye projection unit 317 is designed to project the image projected on the horopter plane onto a display surface for the left eye. Therefore, retinal images that are identical to each other are supplied to the two eyes to remove influences of physiological stereoscopic elements, and stereoscopic depth is given.

The invention discloses a method for realizing omnidirectional stereo imaging by using a single camera and a device thereof. A first catadioptric device and a second catadioptric device are coaxially arranged in opposite directions; the first catadioptric device refracts or reflects an omnidirectional scene beam observed from a first view point, and the second catadioptric device refracts or reflects an omnidirectional scene beam observed from a second view point; a light path redirector is placed in the center between the first catadioptric device and the second catadioptric device and is coaxial with the first catadioptric device and the second catadioptric device; the light path redirector deflects the beams reflected by the first catadioptric device and the second catadioptric device in the same direction; an imager captures the beams deflected by the light path redirector to form an image and outputs a first view image and a second view image with the same resolution. The method and the device thereof have the advantages of wide baseline, the same resolution of image pairs, high real-time, high extraction accuracy of stereoscopic depth, simple matching algorithm of stereo image pairs, wide range of application, and the like.

A reconfigurable backlighting construction for use in portable computer-based systems having direct and projection viewing modes of operation. In the illustrative embodiments of the present invention, the backlighting construction is integrated with a LCD display panel, a micropolarization panel, and a touch-screen writing panel to provide several different types of portable computer-based systems including, for example, a portable notebook computer, a computer-driven image display device, and a portable pen-computing device. In general, each of these computer-based systems are capable of selectively displaying color video images on an actively driven display surface, or projecting such video images onto a wall surface or projection screen without the need for a bulky overhead projector, required by all prior art systems. These computer-based systems can be easily reconfigured for projection viewing without physical removal of the light guiding panel and its light diffusing structures. If desired, these computer-based systems can be used to directly view “spatially-multiplexed” images of 3-D objects or imagery during the direct viewing mode, and when desired these spatially-multiplexed images can be projected onto a wall surface or projection screen during the projection viewing mode. When the spatially-multiplexed images are viewed through electrically-passive polarized glasses, the 3-D object is perceived with stereoscopic depth sensation in either mode of viewing. A portable light projection accessory device is provided for use with the portable computer-based systems of the present invention. In the illustrative embodiments, the portable light projection device has first and second housing portions that are interconnected by a foldable structure that permits the first and second housing portions to be selectively reconfigured for simple trouble-free use during the projection viewing mode of operation, and for compact storage during the direct viewing mode of operation.

The invention discloses a compression-distortion-oriented stereoscopic video quality objective evaluating method comprising: dividing stereoscopic video quality into a left and right visual point quality section and a depth perception quality section. In the left and right visual point quality evaluating section, in view of a characteristic that a video image may generate a block effect and blur due to compression distortion, gradient information is extracted to be used as an image feature; meanwhile in view of a time-space domain visual characteristic of human eyes, left visual point quality and right visual point quality are obtained. In the depth perception quality evaluating section, by three dimensional wavelet transform, a low frequency component in a three dimensional parallax spatial diagram is extracted and the quality of the low frequency component is used as the depth perception quality of the stereoscopic video. At last, the left visual point quality and the right visual point quality are combined with the depth perception quality to obtain a final distortion stereoscopic video quality. The method has advantages of completing an object quality evaluation on the stereoscopic video from the view of the left and right visual point plane video quality and the view of the stereoscopic depth perception, and thereby effectively improving the correlation between an object evaluation result and a subject perception.

Provided is a method and apparatus for linear depth mapping. Linear depth mapping includes using algorithms to correct the distorted depth mapping of stereoscopic capture and display systems.

Systems and methods may provide for tuning content for display based on a user viewing distance as detected by stereoscopic depth cameras. The depth cameras improve the accuracy of detection and segmentation for users, particularly for off axis viewing. The detected viewing distance thereby allows the resolution, size, type and format of the content to be more precisely adjusted to improve the viewing experience and / or to provide an appropriate user interface. Detecting the viewer distance allows the resolution of the content to be reduced when appropriate, thereby reducing the encoding and processing requirements to provide significant improvements in power and bandwidth efficiency.

The invention relates to an evaluation analysis method for three-dimensional viewing fatigue resulting from three-dimensional motion-in-depth. The method comprises the following steps of processing a test three-dimensional image material image, and enabling a target to carry out periodic reciprocating uniform motion in a parallax range of plus or minus 1 degree, wherein the uniform motion is divided into different motion speed levels; dividing subjective evaluation criteria to obtain score levels; analyzing subjective evaluation results of testees; measuring electroencephalograms of the testees before and after the testees view the three-dimensional motion-in-depth namely before and after fatigue, and extracting three basic frequency bands of eight brain regions; and carrying out comparison analysis on various brain region indexes under different fatigue situations, and comparing results with the subjective evaluation results, thereby obtaining the most effective electroencephalogram index for measuring the three-dimensional viewing fatigue resulting from three-dimensional motion-in-depth.

The invention discloses an object detecting method and system based on stereoscopic vision. The method includes acquiring a foreground depth image extracted from a stereoscopic depth image; and setting a height threshold value for obtaining a block, whose value is greater than the height threshold value, in the foreground depth image. If the obtained block meets a predetermined single object condition, the obtained block is detected as a block with a single object. If the obtained block meets a predetermined multi-object condition, smaller blocks with the objects in the obtained block are detected as the blocks with the single objects. If the obtained block does not meet the predetermined single object condition or the predetermined multi-object condition, the height threshold value is changed until the obtained block meets the predetermined single object condition or the predetermined multi-object condition.

The invention discloses a Jingchu folktale clay sculpture figure digital 3D model synthesis method, which comprises the steps of: steps 1, acquiring videos and pictures of Jingchu folktale clay sculpture figures in a digitalized manner; step 2, carrying out layered clay sculpture 3D model geometric modeling, wherein the modeling process can be divided into feature point extraction, surface grid model acquisition, bone creation, skin covering, standard template matching, 3D model calibration, 3D model adjustment and 3D model output; step 3, carrying out clay sculpture 3D model behavioral modeling, and determining attitudes of clay sculpture figures in the process of movements; step 4, reconstructing 3D attitude based on attitude capturing; step 5, and constructing a Jingchu folktale clay sculpture figure resource base. The invention further provides a Jingchu folktale clay sculpture figure digital 3D model synthesis system. The beneficial effects of the method and the system provided by the invention are that: a 3D scanning instrument or a stereoscopic depth video camera is not needed, the modeling is low in cost and fast in speed, the operability is high, the modeling accuracy is improved, the effect is more realistic and vivid, and modification is convenient.

An anaglyphic image presentation system is provided to evaluate and train a user's depth perception abilities. In embodiments, anaglyphic image target components are presented to a user on a display device. The image target components are then viewed by the user through a set of transmission filter lenses. The transmission filter lenses present and block one or more target components based on the peak wavelength transmission associated with each lens. As a result, a user perceives an anaglyphic target image that is resultant from the perceived image target components when viewed through the transmission filter lenses.

A hybrid transmission / auto-conversion 3D format and scheme for transmission of 3D data towards various types of 3D displays is described. In the decoder (20) a stereo-to-depth convertor (24) generates a depth map. In the 3D video signal additional depth information called depth helper data (DH-bitstr) is sparsely transmitted both in time (partial depths in time) and / or spatially (partial depth within the frames). A depth switcher (25) selects the partial depths based on an explicit or implicit mechanism for indicating when these are to be used or when the depths must be automatically generated locally. Advantageously disturbing depth errors due to said stereo-to-depth convertor are reduced by the depth helper data.

An operating method of a display apparatus includes calculating a range of a movement of a user based on eye movement information indicating movements of eyes of the user; and adjusting a stereoscopic depth of a three-dimensional (3D) image based on the range of the movement.

The invention discloses a shaft-shifting stereo camera. A left lens group and a right lens group which are independent from each other and are the same with each other and parallel to the center linein the shaft-shifting stereo camera translate for a distance of L = T / (2A) along the horizontal direction and towards the opposite direction. Two images with different visual angles obtained by the tilt-shift stereo camera have no trapezoidal distortion, and the relationship between the stereo depth of an object of interest in a real scene and the stereo depth of a stereo image convergence point of the object of interest is a linear relationship. The invention further discloses a same-screen chip, the problem that the focal plane of the eyes is separated from the image plane of the three-dimensional image is solved, and the healthy three-dimensional player enables the three-dimensional image measurement process to be more intelligent, simpler and more accurate. The camera can be applied tothe fields of medical endoscopes, endoscopes, industrial endoscopes, stereo cameras, stereo measurement and other stereo image manufacturing and application.

The invention discloses a method for detecting the stereo degree of an autostereoscopic display by using random dot stereopsis. The method comprises the following steps: (1) designing random dot stereogram groups to compose the random dot stereopsis; (2) constructing a geometric model of binocular disparity to calculate a theoretical stereo depth value S obtained by both eyes; (3) observing the random dot stereopsis by eyes through the autostereoscopic display to obtain the actual stereo depth value; and (4) comparing the theoretical stereo depth value with the actual stereo depth value, calculating the error percentage epsilon of the actual stereo depth value in relative to the theoretical stereo depth value, and determining the stereo degree of the autostereoscopic display according to the error percentage. The method is visual, convenient, accurate and real-time in detecting the stereo degree. The random dot stereogram has controllable disparity, and the method can determine the stereo degree of the autostereoscopic display by observing the random dot stereopsis composed by random dot stereograms with different disparities, and comparing the actual stereo intensity with the theoretical value.

Systems and methods may provide for occlusion detection in frame rate conversion. Detecting the occlusion allows frame rate conversion to be more accurately performed. In some embodiments, one or more stereoscopic depth cameras may be used to determine the depth of a moving object to more accurately determine the occlusion. In some embodiments, the compression ratio may be adjusted to balance the frame rate and power to help ensure compliance with a power budget. In at least some embodiments, the motion of a camera may be passed from a 3D render pipe to an encoder to avoid motion calculation and thereby saving power.

The invention discloses glasses based on a digital intelligent virtual three-dimensional stereoscopic image technology and for visual detuning monitoring and rehabilitation training. The glasses comprise a large wide angle depth-of-field adjustable optical imaging system, a digital intelligent main control system, an interaction communication system with a mobile terminal and a power source system. As to the glasses, through the intellectualized digital three-dimensional image technology and optical design, a large wide angle virtual three-dimensional stereoscopic depth scene is manufactured;through interaction communication with the mobile terminal, a special APP controls all stereoscopic picture and video playing functions and related interaction operations for visual detuning monitoring and rehabilitation training of the glasses, and the glasses are provided with a software program for conducting vision and a color blindness and color amblyopia examination on a user and have an interaction communication capacity with a cloud side and a doctor, can conveniently conduct vision detection and rehabilitation training on the user at home, comprise depth-of-field adjustment, angle-of-view adjustment, reaction adjustment, contrast ratio adjustment and the like and help the user to solve all visual detuning problems.

There is described a method for controlling, in a display, a virtual image of a displaying object for which displaying is controllable. The method comprises providing a curved mirrored surface opposing the displaying object to produce the virtual image. The location of an observer is determined, with respect to the curved mirrored surface. A position of the virtual image can then be determined for the observer at the location, wherein this virtual image provides at least one of parallax and a stereoscopic depth cue. The displaying object is controlled to produce the virtual image as determined.

An anaglyphic image presentation system is provided to evaluate and train a user's depth perception abilities. In embodiments, anaglyphic image target components are presented to a user on a display device. The image target components are then viewed by the user through a set of transmission filter lenses. The transmission filter lenses present and block one or more target components based on the peak wavelength transmission associated with each lens. As a result, a user perceives an anaglyphic target image that is resultant from the perceived image target components when viewed through the transmission filter lenses.

Apparatuses and methods are provided that stimulate realistic 3D depth perception from 3D image data. The solution helps the brain perceive a more realistic depth by placing an object, which may or may not be transparent, in virtual 3D space such that the object appears close to the user inside the panoramic viewer in order to give the brain a close point to reference in 3D space where it might normally struggle to perceive depth at the border of two opposing perceptions of 3D depth for the brain.

Systems and methods may provide for occlusion detection in frame rate conversion. Detecting the occlusion allows frame rate conversion to be more accurately performed. In some embodiments, one or more stereoscopic depth cameras may be used to determine the depth of a moving object to more accurately determine the occlusion. In some embodiments, the compression ratio may be adjusted to balance the frame rate and power to help ensure compliance with a power budget. In at least some embodiments, the motion of a camera may be passed from a 3D render pipe to an encoder to avoid motion calculation and thereby saving power.

The present invention discloses a method of analyzing the stereo depth influence factors of a naked eye 3D display system. The method is characterized by according to the Panum's fusion and wave aberration theories, establishing an ideal stereo depth model and an actual stereo depth model, analyzing the factors influencing the actual stereo depth, and evaluating the stereo depth of the display system objectively, and comprises the following steps of S1 combining the human visual characteristics and the Panum's fusion theory to determine a parallax range within which the eyes can fuse to form a 3D experience, and establishing the ideal stereo depth model; S2 according to the wave aberration theory, establishing the actual stereo depth model, and calculating the actual stereo depth by the light spot distribution on the retinas and the monocular resolution limit of the people; S3 comparing the actual stereo depth and the ideal stereo depth, and analyzing the factors influencing the actual stereo depth. According to the present invention, the factors influencing the stereo depth of the naked eye 3D display system are analyzed systematically, and the bases for designing the naked eye 3D display system better and improving the experiences of the naked eye 3D display system are provided.

The invention belongs to the technical field of image processing, and particularly relates to an image stereo matching method. An existing stereo matching method based on deep learning is poor in generalization ability, the main reason is that data in the stereo matching field has certain defects such as too strong reflection and shielding, and on the other hand, an area lacking textures also exists in an image, so that some methods for adding neighborhood constraints are prone to over-fitting. Meanwhile, a high-quality data set in the stereo matching field is lacked, and a network with generalization ability is difficult to obtain through simple training. The invention provides the image stereo matching method which comprises the following steps: constructing a training image library; enhancing a training image; extracting point (line) features of all images; training a feature point extraction network; extracting unary features of the binocular image; acquiring a coarse precision disparity map by the iteration module; performing unitary feature aggregation; performing parallax regression; and performing disparity refinement. The problem of overfitting in a stereo depth matching algorithm is solved.