35results about How to "Solving Imaging Problems" patented technology

The invention provides an imaging method for a shift-variant mode Bistatic Synthetic Aperture Radar (Bistatic SAR) based on inverse variable metric Fourier transform, and the method aims at the characteristic that the resolution of the shift-variant mode Bistatic Synthetic Aperture Radar (Bistatic SAR) changes by time, and uses variable metric Fourier transform to eliminate the adverse effect brought to the imaging of the Bistatic Synthetic Aperture Radar (Bistatic SAR) by the resolution of the shift-variant mode Bistatic Synthetic Aperture Radar (Bistatic SAR) changing by time, so as to use less calculation to achieve the imaging of the shift-variant mode Bistatic Synthetic Aperture Radar (Bistatic SAR). The method solves the shift-variant mode Bistatic Synthetic Aperture Radar (BistaticSAR) imaging problem, and is characterized in that the method uses less calculation to achieve the imaging of the shift-variant mode Bistatic Synthetic Aperture Radar (Bistatic SAR). The method can be applied to the fields of Synthetic Aperture Radar (SAR) imaging, earth remote sensing and the like.

The invention provides an all-solid-state planar array three-dimensional imaging laser radar system, which comprises a detection target, a laser planar array data acquisition and point cloud generating module, and a data processing system, wherein the detection target is installed on a butting surface of a all-solid-state planar array three-dimensional imaging laser radar, so that a pulse laser signal transmitted by means of the laser radar for tracking the detection target returns in the original path, a reception and detection system of the laser radar completes the searching and capture ofthe detection target, acquires relative distance and position measurement parameters of the detection target in real time and acquires a plurality of feature points of the detection target in a laserirradiation range of the detection target and the laser radar, and the feature points are set in an optical field of view region with a fixed divergence angle; the laser planar array data acquisitionand point cloud generating module completes the measurement of the detection target and the depth data generation of the feature points, and transmits the depth data to the data processing system; andthe data processing system calculates azimuth information according to the depth data of each feature point and pixel positions in the field of view region, calculates angle and distance data and calculates attitude data of the detection target.

The invention relates to an X ray phase contrast imaging system and an X ray phase contrast imaging method. The system comprises an X ray device, a grating system, a detection unit, a data processing unit and a relative shifting device, wherein the X ray device emits X ray bundles to a detected object; the grating system comprises a first absorption grating and a second absorption grating and is positioned on a direction of an X ray, and the X ray refracted by the detected object forms a variable-intensity X ray signal through the first absorption grating and the second absorption grating; the detection unit receives the variable-intensity X ray signal and converts the variable-intensity X ray signal into an electrical signal; the data processing unit processes and extracts the refractionangle information in the electrical signal and computes pixel information by utilizing the refraction angle information; and the relative shifting device is used for enabling the detected object to relatively shift relative to the imaging system. The imaging system carries out phase contrast imaging for the detected object within a certain relative shifting range of the imaging system and the detected object at a plurality of positions so as to obtain a plurality of images of the detected object. The images are converted into the images on the same reconstruction plane so as to carry out three-dimensional image reconstruction.

The invention discloses a single-frequency radar imaging method for a spinning target. The method comprises steps as follows: obtained radar echoes of a target in all azimuth angles are divided into N sub-apertures, and Fourier transform is performed on the radar echoes in each sub-aperture, so that lateral distribution of scattering intensity in each sub-aperture is obtained; RADON inverse transformation is performed on the lateral distribution of the scattering intensity in the N obtained sub-apertures, and a first image of the target is rebuilt; a second image of the target is rebuilt with the CLEAN algorithm according to the rebuilt first image of the target. According to the method, the imaging problem of wide-angle continuous wave radar echoes can be solved, and the imaging problem of the spinning target can also be well solved. The method has the higher practical value in detection and identification of the radar target.

The invention discloses an AR (augmented reality) adjustable transparent projection screen, a projection method and a manufacturing method. The projection screen sequentially comprises AG glass, a holographic projection film, a PDLC adjustable light film, a one-way perspective film and ultra-white glass. The projection method comprises the following steps: enabling one side of AG glass to face a projector, and enabling one side of the ultra-white glass to face outdoors, wherein when an observer watches from the side of the AG glass, the light projected by the projector forms primary imaging onthe holographic projection film, and the light projected by the projector forms secondary imaging on the PDLC dimming film; and when the light on one side of the ultra-white glass is bright, the hazeof the PDLC dimming film is adjusted, so that the projection effect and the perspective effect are observed to the optimal state. According to the manufacturing method, the method comprises the steps: pasting the holographic projection film on the surface of AG glass, pasting the one-way perspective film on the surface of ultra-white glass, integrating optical components and assembling optical components. The holographic projection film is used for primary imaging to project images, the PDLC adjustable light film is used for secondary imaging, and the secondary imaging is superposed on the primary imaging, thereby improving the imaging effect is enhanced while the perspective effect of the projection screen is ensured.

The invention discloses a printed matter quality test device. The test device is arranged at a position corresponding to a chain of a bi-color ink recorder for forming a test point for the quality of printed matter, the test device comprises a camera assembly, a perspective camera, a light source and an air-drafting and flattening device, the chain is composed of a first arc segment, a second arc segment, a third arc segment, a first straight-line segment, a second straight-line segment and a third straight-line segment, the test point is arranged at a climbing position corresponding to the second straight-line segment of the chain, the camera assembly and the air-drafting and flattening device are arranged at the two sides of the chain corresponding to the test point respectively, the light source and the camera assembly are arranged at the same side, and the perspective camera and the air-drafting and flattening device are arranged at the same side. According to the printed matter quality test device, the test point is arranged at the position corresponding to the chain of the bi-color ink recorder, the imaging problem that in an existing bi-color ink recorder, a test device cannot be arranged at the position of an impression cylinder but is arranged on a collection portion is effectively solved, imaging stability is greatly improved, and the false alarm rate is lowered.