160 results about "Integral imaging" patented technology

A wearable 3D augmented reality display and method, which may include 3D integral imaging optics.

A radiation therapy system optimized for treating extremities such as the breast has unique geometrical features that enable the system to deliver an accurately located prescribed dose to a target volume while eliminating or reducing the collateral dose delivered to the rest of the patient. An optional integral imaging system provides accurate target volume localization for each treatment session. Utilizing the effects of gravity on a prone patient maximizes the separation of a target volume within the breast to adjacent critical structures such as the chest wall, heart and lungs, thereby reducing long term complications not associated with the primary disease. A shielded interface surface between the radiation source and the patient reduces patient dose due to scattered or stray radiation. A shielded enclosure for the radiation sources combined with the shielded interface surface eliminates the need for primary shielding in the room and allows the therapy system to be used in a transportable, mobile facility.

A holographic direct-view display system uses holographic integral imaging techniques that is an auto stereoscopic way to reproduce parallax and occlusion. The display is not resolution limited and is scalable to display life size images if desired. The system can be used to transmit 3D depictions of a scene at video and sub-video rates as well as other information, such as images of documents or computer generated images. The images may be captured, transmitted and displayed in real-time (or near real-time) for telepresence or stored for time-shifted display. The system combines integral holography, a pulsed laser to record the hologram at high speed and a dynamic refreshable holographic material such as a photorefractive polymer as a recording media. The system uses techniques to write, read and erase the updateable hologram that allow the holographic material, hence direct-view display to remain stationary throughout each of the processes for continuous presentation of the hologram to the audience. The system may write, read and erase at the same time and continuously to increase throughput. This system may also use additional novel techniques to improve brightness, efficiently implement a full-parallax display and to implement a full-color display in a transmission geometry.

A three-dimensional (3-D) display system using a variable focal length lens includes at least one two-dimensional (2-D) display device, configured to display at least one two-dimensional image. The display system also includes an array of micromirror array lenses optically coupled to the display device, each micromirror array lens of the array of micromirror array lenses placed at a different location with respect to the display device, configured to focus the at least one two-dimensional image from each different location to provide a three-dimensional (3-D) image. The advantages of the present invention include increased viewing angles and wide depth range of three-dimensional images.

A catheter device that is useable to penetrate from a blood vessel in which the catheter device is positioned to a target location comprises a flexible catheter advanceable into the first blood vessel, a tissue penetrator lumen adapted to receive an operative tissue penetrator which is usable to penetrate from the blood vessel to the target location when properly aimed. Further said catheter including an imaging transducer fixedly mounted on or within the catheter body to provide an imaging signal from which an image of the target location can be obtained. The catheter device may include an imageable marker on the catheter to form on the image obtainable from the imaging signal a penetrator path indication that indicates the path that will be followed by the tissue penetrator when the tissue penetrator exits from the catheter. Alternatively, or addition thereto, the imaging transducer may comprise a plurality of imaging elements which are located so that the penetrator path indication can be obtained. A method of utilizing such a catheter device to bypass an arterial obstruction is also disclosed.

A system and method is provided to view an anatomical structure such as a blood vessel in high contrast with its surrounding tissue. The system and method may be used to produce an image of an anatomical structure using reflected electromagnetic radiation singularly scattered from target tissue. The system and method may also provide same-side illumination and detection of reflected electromagnetic radiation in a convenient integral imaging device. The system and method may also provide helmet mounted imaging technology in a single integral helmet which allows the wearer to view an anatomical structure located within a patient such that the image is continuously oriented according to the orientation of the helmet wearer's head. The system and method may also be used in the performance of venipuncture. The system and method may provide for improved contrast between any anatomical structure and its surrounding tissue for use in any imaging system.

The invention which relates to an optical instrument and detection imaging technique discloses a large field depth iris image acquisition system and a method based on a plurality of fixed-focus cameras. The system comprises an iris image collecting device and an image recognition device. The method comprises the following steps: respectively imaging the iris by means of the fixed-focus cameras having different imaging object distance ranges and producing a multi-path fixed-focus image results; choosing one or a plurality of multi-path fixed-focus image results through distance measurement or image quality evaluation method; carrying out image processing and identification of chosen qualified iris image data. The invention effectively integrates the imaging ranges of different fixed-focus cameras in the mode of self-adapting switchover, thereby taking advantages of the cameras and at same time removing disadvantages of the cameras, enlarging the integral imaging range of the acquisition system, and improving the feasibility of an iris recognition system. Compared with the prior iris imaging method adopting a zoom camera, the invention has the advantages of low cost, quick and noiseless focusing.

A method for three-dimensional reconstruction of a three-dimensional scene and target object recognition may include acquiring a plurality of elemental images of a three-dimensional scene through a microlens array; generating a reconstructed display plane based on the plurality of elemental images using three-dimensional volumetric computational integral imaging; and recognizing the target object in the reconstructed display plane by using an image recognition or classification algorithm.

A method disclosed herein relates to displaying three-dimensional images. The method comprising, projecting integral images to a display device, and displaying three-dimensional images with the display device. Further disclosed herein is an apparatus for displaying orthoscopic 3-D images. The apparatus comprising, a projector for projecting integral images, and a micro-convex-mirror array for displaying the projected images.

A catheter device that is useable to penetrate from a blood vessel in which the catheter device is positioned to a target location comprises a flexible catheter advanceable into the first blood vessel, a tissue penetrator lumen adapted to receive an operative tissue penetrator which is usable to penetrate from the blood vessel to the target location when properly aimed. Further said catheter including an imaging transducer fixedly mounted on or within the catheter body to provide an imaging signal from which an image of the target location can be obtained. The catheter device may include an imageable marker on the catheter to form on the image obtainable from the imaging signal a penetrator path indication that indicates the path that will be followed by the tissue penetrator when the tissue penetrator exits from the catheter. Alternatively, or addition thereto, the imaging transducer may comprise a plurality of imaging elements which are located so that the penetrator path indication can be obtained. A method of utilizing such a catheter device to bypass an arterial obstruction is also disclosed.

The invention provides a quick generating method for an integral imaging micro image array based on a GPU. The method comprises the process of establishing a virtual camera array to obtain a disparity image array in a Direct3D program and the process of achieving the operation that the disparity image array is quickly converted into a micro image array in a CUDA program. A simplified virtual camera array structure is established based on the computer graphics library Direct3D to carry out rendering on a virtual scene, and the efficiency of generating all the information of the micro image array is improved; the quick generation of the micro image array is completed based on the characteristics of a CUDA parallel computing architecture, data transmission in a CPU and a GPU is barely needed to be carried out through a computer system bus, and therefore the efficiency of generating the micro image array is further improved. Through the method, the speed of generating the integral imaging micro image array is increased by tens of times and even hundreds of times compared with the generation based on the CPU, and the requirements of real-time dynamic integral imaging 3D display are met.

The invention discloses an integral imaging naked eye three-dimensional autostereoscopic LED (light emitting diode) display system and a display screen thereof. The display system comprises a computer, an integral imaging naked eye three-dimensional autostereoscopic LED display screen connected with the computer, and a camera array which is used for acquiring image element array generated by an image element for the computer, wherein the image element array is displayed in the LED display screen through the computer. The LED display screen comprises a plurality of image units which are in array assembly together; the image unit comprises a planoconvex lens, a light blocking membrane arranged at the periphery of the planoconvex lens, and a plurality of LED pixel lamps; one surface of the planoconvex lens is a plane, and the other surface is a convex surface; the LED pixel lamps are arranged on the plane, and the lighting center of the LED pixel lamps is positioned on a focal plane of the planoconvex lens. By the integral imaging naked eye three-dimensional autostereoscopic LED display screen adopting the technical scheme, panorama three-dimensional imaging technology is perfectly combined with the LED display system through integral imaging, a typoscope is unnecessary; the viewing distance is more flexible, and the crosstalk degree is little.

An apparatus for generating a parallax image to be used for a display of a three-dimensional image on a three-dimensional integral imaging display includes an image signal acquiring unit, an image signal assigning unit, and a parallax image generator. The image signal acquiring unit acquires a plurality of image signals by picking up an image of an image object from a plurality of different parallax directions. The image signal assigning unit assigns an output order of the plurality of image signal so that the plurality of image signals are arranged in a reverse parallax direction order to an order of beam directions of the three-dimensional integral imaging display. The parallax image generator generates a parallax image from the plurality of image signals to which an output order is assigned by the image signal assigning unit.

In a method for manufacturing an integral imaging device, a layer of curable adhesive is first applied on a flexible substrate and half cured such that the curable adhesive is solidified but is capable of deforming under external forces. Then the curable adhesive is printed into a lenticular lens having a predetermined shape and size using a roll-to-roll processing device and fully cured such that the curable adhesive is capable of withstanding external forces to hold the predetermined shape and size. Last, a light emitting diode display is applied on the flexible substrate opposite to the lenticular lens such that an image plane of the light emitting diode display coincides with a focal plane of the lenticular lens.

The invention discloses an integral imaging 3D liquid crystal display and optical equipment used by the same. The integral imaging 3D liquid crystal display comprises a lens array, a display panel and a dimming panel which is clamped between the lens array and the display panel, wherein the dimming panel comprises a plurality of dimming units corresponding to different lenses or combinations of the lens array, an electrode and a dimming material; the dimming units do not have displacement relative to the lens array and the display panel during the operation; the electrode is applied with voltage to ensure that the transmission direction of a light ray from the display panel is changed when the light ray is transmitted to the lens array by the dimming material. The angle of view of the integral imaging 3D liquid crystal display can be enlarged.

The invention provides a method for removing integral imaging three-dimensional displaying crosstalk images. The method respectively searches corresponding three-dimensional information and crosstalk information on a three-dimensional visual area and a crosstalk area, replaces the crosstalk information with blank information in each image element, and acquires crosstalk-free micro-image arrays. During integral imaging three-dimensional display, viewers can still view integral three-dimensional images in an original three-dimensional visual area, yet view blank images in the crosstalk area where crosstalk images are originally viewed, and occurrence of the crosstalk images is avoided.

The invention provides an integral imaging three-dimensional display center depth plane adjusting method. According to the method, a micro image array with a center depth plane z0 is acquired through integral imaging shooting, integral imaging three-dimensional display of a center depth plane z1 is realized, and z0 is not equal to z1. The method comprises three processes, namely, extraction of orthogonal parallax information, adjustment of parallax information and synthesis of the micro image array. Integral imaging three-dimensional display of different center depth planes can be realized without reshooting of three-dimensional scenes, so that the utilization rate of three-dimensional information is increased, and the shooting cost is saved.

An integral imaging system may include a lens unit. The lens unit may include a first substrate; a second substrate; a first electrode on the first substrate; a second electrode on the second substrate; a liquid crystal layer between the first and second substrates; and an array of nanostructures protruding from the first substrate into the liquid crystal layer. The first and second electrodes may be configured to apply one or more voltages to the array of nanostructures. When the one or more voltages are applied to the array of nanostructures, one or more electric fields may be formed between the array of nanostructures and the second electrode, varying an arrangement of molecules in the liquid crystal layer and forming a refractive index distribution in the liquid crystal layer.

Exemplary methods, endoscopes, and endoscope sheaths are provided having an integrally formed imaging window. The sheath may comprise thin coiled wires and may be made using a dip-casting process.

The invention relates to a fundus camera that incorporates an integral imaging system for capturing an integral photograph of the fundus. This integral photograph enables projecting a three-dimensional image and generating topographical maps of the fundus. The fundus camera can function plenoptically and thus zoom onto a two-dimensional image generated from the integral photograph. The proposed equipment consists of an optical system for illuminating the fundus and an optical system forming the integral image capture system. This capture system includes an ophthalmoscopic lens, a microlens array and a sensor, and it allows recording, in a single shot, multiple views of the fundus. To improve the resolution of the integral photograph, the capture system has a device that allows displacing the microlens array by a few microns.

The invention discloses a remapping-based integral imaging micro-image array rapid generation method. The remapping-based integral imaging micro-image array rapid generation method includes two steps: calculation of a mapping matrix, and acquisition of remapping of a parallax image by means of a camera array. The remapping-based integral imaging micro-image array rapid generation method utilizes a chequer scaling board to calculate and store a mapping matrix, enables a parallax image taken by a camera array to directly generate a micro-image array through remapping, and simplifies three processes, monocular correction of the camera, multi-view calibration and image combination of micro-image array, into one process which is suitable for GPU parallel processing at the same time, so that the generation speed of the micro-image array is accelerated and generation of the micro-image array is easy for implementation.

The invention provides a double-field-of-view long-wave infrared optics passive athermalization optical system. The double-field-of-view long-wave infrared optics passive athermalization optical system is an athermal double-field-of-view optical system which is high in utilization rate of lenses, has double fields of view, can automatically adapt to environmental temperature changes, and can achieve athermalization and achromatism. According to the technical scheme, a front fixing set is composed of a convex negative lens (7) which is arranged between a positive lens (8) and a zoom lens negative lens (6), and the positive lens; a rear fixing set is composed of a lens (5), a negative lens (4) close to the lens (5), a concave and convex surface lens (2) and a convex lens (3) close to the convex surface of the concave and convex surface lens (2). The zoom lens negative lens moves back and forth in the direction of an optical axis by using a motor as a driving source, the focal length of the zoom lens negative lens changes from 50mm to 150mm in a switching mode, and two-gear double-field-of-view zooming is achieved; when in a Long focal length state, an aperture diaphragm of the optical system is located on a biconvex lens; when in a short focal length state, the aperture diaphragm of the optical system is located on the positive lens; an integral imaging system is formed by the zoom lens negative lens, the front fixing set and the rear fixing set together.

The invention provides an integral imaging display system with display parameters capable of being controlled interactively and a control method of the integral imaging display system. The system comprises a display panel used for displaying a unit image array and a unit lens array used for carrying out 3D reconstruction on the unit image array displayed by the display panel. The system further comprises a liquid crystal display panel used for generating a mask pattern sequence, the liquid crystal display panel is arranged between the display panel and the unit lens array, the liquid crystal display panel is attached to the unit lens array, and the display panel is arranged on a rear focal plane of the unit lens array. According to the system, the mask pattern sequence formed by alternately controlling the liquid crystal display panel in a conversion mode is used for dynamically controlling the aperture shape and transmittance of each unit lens, and therefore the reconstruction image resolution or reconstruction image field depth or whole field angle of the system is controlled. The system and the use method have the advantage of being high in capacity of interaction control over the three display parameters, and can be used for the field of naked-eye 3D image displaying, 3D televisions and the like.

The invention discloses a wide-viewing-angle integral imaging 3D display apparatus. Horizontal pitches of pin holes in any row of a pinhole array with gradually-varied aperture are the same, the horizontal aperture width of the pinholes in the pinhole array with the gradually-varied aperture is gradually increased from the middle to the two sides, and the horizontal width of a reconstruction 3D vision area of an image primitive in a micro-image array is gradually increased from the middle to the two sides via the pinholes in the pinhole array with the gradually-varied aperture so that the horizontal width of a public area of all the image primitive reconstruction 3D vision areas is increased, and the integral imaging 3D display visual angle is wider than the display visual angle of a non-crosstalk integral imaging 3D display apparatus based on polarization grating in the prior art.

The invention discloses a digital high-fidelity image collecting and processing method of stone cave temple wall paintings. The method is characterized in that through photography collection, image treatment and image storage, by utilizing a cavalier perspective and parallel translation principle and adopting an autonomously designed photography collecting system and a unique cross-shaped skeleton image splicing processing method, the data is stored safely, normalized stone cave cultural relic wall painting digitalization is carried out, thousands and even more original images photographed for the same wall surface can be spliced and fused into a traceless and perfect high-fidelity full-scale integral imaging picture, and the purposes that the precious cultural heritage can be stored permanently and used sustainably for human beings are achieved.

A display device convertible between two-dimensional (2D) and three-dimensional (3D) is provided. The convertible display device is based on integral imaging (II) or integral photography (IP) and displays 2D or 3D images. An image processor generates and transmits elemental images to reconstruct a 3D image or transmits a desired two-dimensional image, and a transmission-type display device displays the image received from the image processor. At this time, a diffusion rate (or haze rate) of light illuminated from a point light source array that is made of a plurality of point light sources is controlled by a variable diffuser and as the light illuminates the transmission-type display device, the device displays 2D or 3D images. According to the present invention, a point light source array is generated by controlling a variable diffuser and as a result a display device convertible between 3D and 2D is achieved. Moreover, a 3D image can be made by spatially modulating the light illuminated from a point light source array and, thereby, an available depth region is dramatically improved.

The invention provides an energy-saving jump-image-free integral imaging and displaying device based on grating waveguide, which is used to solve the technical problem that existing integral imaging and displaying devices have low light energy utilization rate and cannot balance the imaging quality and the processing technology. The energy-saving jump-image-free integral imaging and displaying device based on grating waveguide comprises an LED light source, a waveguide medium, a display panel and a microlens array. The LED light source is an array light source formed by red, green and blue three-primary-color LED lights. The display panel is a liquid crystal panel without a color filter. A grating which consists of a plurality of periodically-arranged grating elements is disposed on the surface, adjacent to the display panel, of the waveguide medium. Each grating element comprises three grating regions corresponding to the periods of red, green and blue three-primary-color light, from large to small. The microlens array, the display panel and the waveguide medium are sequentially arranged in parallel. The LED light source is located at the side of the waveguide medium. Light emitted from the LED light source is irradiated onto the corresponding grating region, and light emitted from the region can be vertically irradiated only onto a light channel, corresponding to the region, on the display panel.

The invention discloses a gradually-varied aperture pinhole array-based non-crosstalk integral imaging 3D display device, which comprises a 2D display screen and a gradually-varied aperture pinhole array, wherein the 2D display screen is used for displaying a micro-image array; horizontal and vertical central axes of the gradually-varied aperture pinhole array are correspondingly aligned at the horizontal and vertical central axes of the 2D display screen respectively; a first polarization grating is attached to the 2D display screen; a second polarization grating is attached to the gradually-varied aperture pinhole array; the first polarization grating and the second polarization grating are formed by tightly arranging a series of grid line units with the same sizes in the horizontal direction; each grid line unit only has one polarization direction; and the polarization directions of any two adjacent grid line units are intersected or opposite. The gradually-varied aperture pinhole array-based non-crosstalk integral imaging 3D display device provided by the invention aims at solving the crosstalk in the horizontal direction, so that a gradually-varied aperture pinhole array-based integral imaging 3D display device can be widely applied.