15 results about "Integral imaging" patented technology

The invention provides a long-depth-of-field integrated imaging display, a long-depth-of-field integrated imaging method and a long-depth-of-field integrated imaging system. The long-depth-of-field integrated imaging display comprises an image processor, a display, a microlens array and a quartic phase mask, the pupil position of each micro lens of the micro lens array is correspondingly integrated with a quartic phase mask; the image processor is used for acquiring a to-be-displayed image and constructing an element image array; performing inverse convolution processing on each element image in the element image array based on a preset phase mask function, and constructing a preprocessed element image array matrix; performing negative value processing on the preprocessed element image array matrix to obtain a preprocessed element image array; and the display is used for displaying the preprocessed element image array, so that the preprocessed element image array generates a long depth-of-field image through the micro-lens array and the quartic phase mask. According to the invention, defocus blurring is effectively suppressed without introducing an extra complex optical structure, a long depth-of-field image is generated on the premise of ensuring the image contrast, and the integrated imaging display quality is improved.

The present application relates to a kind of radar scattering cross section test methods based on deep learning and ISAR imaging inversion, the method includes using ISAR imaging test mode to obtain target and calibration body broadband radar scattering echo signal, calibration processing and applying filter-inverse projection imaging algorithm to carry out ISAR imaging, application completes the deep learning model of accurate extraction ISAR image scattering signal area, application FFT transform-interpolation integral ISAR imaging inversion algorithm high-precision inversion reconstruction RCS value, change ISAR imaging aperture center azimuth angle traversal acquisition target all azimuth angle RCS data.The radar scattering cross section test method based on deep learning and ISAR imaging inversion provided by the present application solves the accurate extraction ISAR image scattering area and ISAR image high-precision inversion reconstruction RCS and other test practical problems, expands RCS data acquisition method.

The invention relates to a radar cross section test method based on deep learning and ISAR imaging inversion, and the method comprises the steps: employing an ISAR imaging test mode to obtain broadband radar scattering echo signals of a target and a calibration body, carrying out the calibration processing, and carrying out the ISAR imaging through employing a filtering-inverse projection imaging algorithm, and accurately extracting an ISAR image scattering signal region by using the trained deep learning model, inverting and reconstructing an RCS value with high precision by using an FFT (Fast Fourier Transform)-interpolation integral ISAR imaging inversion algorithm, and traversing by changing an ISAR imaging aperture center azimuth angle to obtain target omni-directional angle RCS data. According to the radar cross section test method based on deep learning and ISAR imaging inversion provided by the invention, the test practice problems of accurate extraction of an ISAR image scattering region, high-precision inversion reconstruction of the RCS by the ISAR image and the like are solved, and an RCS data acquisition method is expanded.

The application belongs to the technical field of three-dimensional display, and discloses a depth-of-field extension method and system for integral imaging. The method arranges a plurality of imaging devices with focal length-wavelength dependence on a micro display; in a first frame time, controls an element image area covered under each imaging device to display in a first color contrast relationship, and forms an image on a first depth plane; in a second frame time, controls the element image area covered under each imaging device to display in a second color contrast relationship, and forms an image on a second depth plane; and alternately displays the images on the two depth planes through time multiplexing. The depth of field can be extended, and high-quality imaging can be performed on two neutral depth planes.

Disclosed is a large-viewing-angle integral imaging 3D display device based on secondary light field modulation. The device includes a 2D display screen, a light field guiding layer and a light field reconstruction layer. The 2D display screen is located at a bottom layer of the device, and the light field guiding layer and the light field reconstruction layer are located above sequentially. The 2D display screen displays an interleaved coded elemental image array and provides an interleaved light field for an upper structure of the device. The light field guiding layer performs first light field modulation and is configured to modulate light emitted from the 2D display screen and guide and separate interleaved light field with different viewing area information in space. The light field reconstruction layer performs secondary light field modulation, and is configured to reconstruct and splice separated light beams modulated by the light field guiding layer.

The method of snapshot compressive imaging three-dimensional Gaussian splatting reconstruction belongs to the field of computer vision and computational photography. A reconstruction network based on the hybrid architecture of stochastic gradient Langevin dynamics (SGLD) and explicit three-dimensional Gaussian representation is built. Then, multiple physical perception modules are combined to achieve the deep decoupling and reconstruction of the spatiotemporal information of dynamic scenes. Driven by the embedded decoupling deformation field, the deformation field contains a coarse-grained trajectory prediction branch and a fine-grained integral fitting branch: the coarse-grained branch combines low-frequency time coding with latent embedding features, enabling Gaussian primitives to capture global rigid motion trajectories and serving as a temporal regularizer; the fine-grained branch uses high-frequency time coding to predict non-rigid deformation and physically fits the motion blur stripes generated by temporal integration through anisotropic scale stretching. An adaptive density control strategy compatible with physics is introduced. Using the physical integral imaging simulation module, high-fidelity and multi-view consistent high-speed dynamic three-dimensional scene reconstruction results are obtained.

The invention relates to the field of seismic response measurement of building structures, in particular to a method for measuring inter-story displacement of a building under seismic excitation based on exposure integral correction, which comprises the following steps of: acquiring a pixel displacement matrix through an optical flow method by acquiring a building image signal; constructing an exposure integral imaging model to correct amplitude and phase deviation, and realizing subspace robustness through weighted low-rank decomposition; and extracting a virtual baseline to calculate an initial scale factor, dynamically updating through Kalman filtering, finally calculating physical interlayer displacement and evaluating uncertainty, and designing additional row-level compensation for the rolling shutter camera.

The utility model discloses a kind of triangle support rings for secondary mirror support, it is related to secondary mirror support equipment technical field, it includes triangle secondary mirror support ring, secondary mirror and secondary mirror heat insulation pad, the light inlet end of the triangle secondary mirror support ring is provided with secondary mirror light shield;The secondary mirror is installed on secondary mirror flexible joint, the secondary mirror flexible joint is set to the inboard of secondary mirror adjustment pad, the secondary mirror flexible joint and secondary mirror adjustment pad are located in secondary mirror light shield, and are connected with triangle secondary mirror support ring;The secondary mirror heat insulation pad is installed on the light inlet end of triangle secondary mirror support ring, and the secondary mirror heat insulation pad is located in the inside of secondary mirror light shield.The utility model design is simple, structure is more stable, can make secondary mirror more stable in integral imaging effect, and integral imaging effect is better.

The utility model discloses a floor fan which comprises a fan base, an energy storage battery box used for containing an energy storage charge-discharge battery set is arranged on one side of the right upper end of the fan base in an integrated imaging mode, and a fan supporting rod used for supporting a fan head and a driving part is vertically connected to the center position of the right upper end of the fan base. The energy storage battery box and the built-in energy storage charge and discharge battery group are arranged on the fan base, so that single dependence on a traditional external socket is eliminated, the problem that the indoor and outdoor use range of the floor fan is limited is effectively solved, and a user can use the fan more flexibly without being limited to the position of the socket. Meanwhile, due to the stable connection design of the fan base and the fan supporting rod, the bottom end of the fan supporting rod is fixed in a fixing hole groove in the center of the end of the fan base, and the top end of the fan supporting rod is fixed on the inner side of the center of the bottom end of the control panel box, reliable supporting is provided for the fan head and the driving part, and fan toppling caused by unstable connection is avoided. And the safety and the stability in the use process are enhanced.

A surgical instrument and related method includes an instrument body, a guide shaft distally projecting from the instrument body, and a first surgical tool. The guide shaft has a guide sidewall, a guide lumen, and a clearance opening radially extending through the guide sidewall in communication with the guide lumen. The first surgical tool has an elongate body and a distal head configured to deflect relative to the elongate body from a first position to a second position. The distal head in the first position is positioned within the guide lumen along the central axis. The distal head in the second position is deflected from the central axis and extends at least partially through the clearance opening thereby vacating at least a portion of the guide lumen for introducing a second surgical tool through the guide lumen.

The present application relates to a metalens array-based binocular near-eye integral imaging three-dimensional (3D) display system, comprising: a first micro-display screen arranged within a right-eye field of view and a second micro-display screen arranged within a left-eye field of view. A first metalens array is arranged on the side of the first micro-display screen where an image is displayed, and a second metalens array is arranged on the side of the second micro-display screen where an image is displayed; the first micro-display screen and the second micro-display screen are used for providing image source light having binocular disparity, and the first metalens array and the second metalens array are used for modulating the image source light having binocular disparity to generate two 3D images having binocular disparity and depth information. Compared with conventional technologies, the present application can simultaneously achieve adjustment of the focal positions and the vergence angles of the left and right eyes of a viewer, bringing more realistic and accurate spatial 3D perception to users, and better conforming to natural viewing habits of the human body.

Directional illumination devices and associated methods are described that enable control of the light emission direction from micro-display panels devices such as head mounted displays. These directional illumination designs reduce or eliminate crosstalk. One example directional illumination unit produces a plurality of directional light bundles, where each directional light bundle is confined within a specific angle with respect to an optical axis of head mounted display, and each ray bundle only passes through only one microlens a first microlens array where elemental images associated with the micro-display of the head mounted display are formed. The directional illumination unit includes at least a second microlens array and one or more of a third microlens array, a barrier array, a condenser lens, or a lightguide.

Disclosed is a large-viewing-angle integral imaging 3D display device based on secondary light field modulation. The device includes a 2D display screen, a light field guiding layer and a light field reconstruction layer. The 2D display screen is located at a bottom layer of the device, and the light field guiding layer and the light field reconstruction layer are located above sequentially. The 2D display screen displays an interleaved coded elemental image array and provides an interleaved light field for an upper structure of the device. The light field guiding layer performs first light field modulation and is configured to modulate light emitted from the 2D display screen and guide and separate interleaved light field with different viewing area information in space. The light field reconstruction layer performs secondary light field modulation, and is configured to reconstruct and splice separated light beams modulated by the light field guiding layer.

An integral imaging parameter optimization method based on deep learning and a multi-objective genetic algorithm. The method comprises: prediction by a neural network and precise optimization using a genetic algorithm; prediction by a neural network comprises establishing a relational model between three system parameters, i.e. the lens focal length and the lens pitch of a microlens array and the distance from the lens array to a display screen, and three display parameters, i.e. the resolution, the depth of field and the field of view, and using same to perform reverse prediction of rough system parameters (output) on the basis of display parameters (input), a training data set used being a data set that is obtained under random actual conditions by means of optimization based on a genetic algorithm; and precise optimization using a genetic algorithm comprises performing population processing on the combination output by the previous step, using same as an input of an SPEA2-based genetic algorithm, and performing a smaller number of iterations to obtain a precise solution.

This invention relates to the field of seismic response measurement of building structures, specifically to a method for measuring inter-story displacement of buildings under seismic excitation based on exposure integral correction. This method acquires building image signals and obtains the pixel displacement matrix using optical flow; constructs an exposure integral imaging model to correct amplitude and phase deviations, and achieves subspace robustness through weighted low-rank decomposition; extracts a virtual baseline to calculate the initial scaling factor and dynamically updates it through Kalman filtering; finally, it calculates the physical inter-story displacement and evaluates the uncertainty, and designs additional row-level compensation for rolling shutter cameras.