Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

183results about How to "Uniform imaging" patented technology

Device and method for adjusting view field of spliced panoramic camera

The invention discloses a device and a method for adjusting the view field of a spliced panoramic camera. The adjusting device comprises an inclined plane, a guide rod and an adjusting lever, wherein a camera is arranged on the inclined plane; the adjusting lever consists of an upper connecting rod and a lower connecting rod; the guide rod is provided with a sleeve sliding linearly along the guide rod; the inclined plane is hinged with the sleeve through the upper connecting rod which is hinged with the upper edge of the inclined plane; the inner side of the inclined plane is vertically fixed with the lower connecting rod which is coaxial with the optical axis of the camera; and the inclined plane is hinged with the lower end of the guide rod through the lower connecting rod. The adjusting method comprises the following steps of: calculating a required inclination angle alpha 1 and a current inclination angle alpha 0 of the optical axis of the camera according to the view field adjusting range of the camera; synchronously adjusting the inclination angle of each camera optical axis of the spliced panoramic camera to the alpha 1; and regenerating a spliced panoramic image according to the adjusted inclination angle alpha 1 of the camera optical axis to complete view field adjustment. The device and the method are simple and effective and meet the objective requirement on the adjustment of the view field of the camera in practical application of the spliced panoramic camera.
Owner:HUNAN VISION SPLEND PHOTOELECTRIC TECH

High spatial resolution remote sensing image crown outline delineation system and method

The invention discloses a high spatial resolution remote sensing image crown outline delineation system and a method and aims at delineating the crown outline of a high spatial resolution remote sensing image simply and efficiently. The method includes the following steps: acquiring a high spatial resolution remote sensing image with forest stand being in growing season and extracting a single forest stand image; according to the single forest stand image, using gradient as division function and adopting Laplace-Gauss operator to conduct boundary detection on a grayscale image and obtain an intermediate result image; subsequently, adopting morphology technology to mark a foreground treetop object in a front intermediate result image to obtain a treetop tag; calculating a background tag inthe intermediate result image and generating a crown boundary line surrounding each treetop tag; and then conducting crown delineation on the crown boundary line under the guide of treetop to obtain acrown outline distribution chart. Compared with the prior art, the system and the method can be applied to the fields such as forestry investigation, forest resource monitoring, forestry remote sensing and the like.
Owner:RES INST OF FOREST RESOURCE INFORMATION TECHN CHINESE ACADEMY OF FORESTRY

Telecentric F-theta optical lens and optical system

The present invention relates to a telecentric F-theta optical lens and an optical system; the optical lens comprises a first lens, a second lens, a third lens and a four lens, which are arranged in sequence along an incidence direction; the first lens is a double concave negative lens; the second lens is meniscus positive lens with a curved surface toward the incidence side; the third lens is a plane convex positive lens or a double convex positive lens; the fourth lens is a convex plate positive lens or a double convex positive lens. Besides, preferably the optical power of each lens and the system optical power of the optical lens satisfy that: f1 / fw is more than -0.65 and less than -0.55, f2 / fw is more than 1.6 and less than 2.5, f3 / fw is more than 0.8 and less than 1.2, f4 / fw is more than 2.2 and less than2.5, wherein, f1, f2, f3 and f4 are the optical powers of the first lens, the second lens, the third lens and the fourth lens respectively; fw is the system optical power of the optical lens; by arranging the four lenses to be a 'negative-positive-positive-positive' separated optical power system, the exit pupil position of the F-theta optical lens is positioned at an afocal position, and the image main light in the field of view is parallel mutually and perpendicular to the imaging surface. Besides, the astigmatism and the field curvature of the system are regulated perfectly, the imaging on the whole field of view is uniform, and no vignetting exists.
Owner:HANS LASER TECH IND GRP CO LTD

Earthquake multiple migration method

The invention relates to an earthquake multiple migration method. According to the invention, the improvement is carried out on the basis of a reverse time migration method and multiples are fused into the reverse time migration process, so that the multiples are homed to a correct position under the ground. The multiple migration method disclosed by the invention is mainly divided into the following two steps of: a first step of obtaining the multiples by utilizing known methods for forecasting the multiples; and a second step of carrying out pre-salt depth domain imaging by utilizing the reverse time migration method. According to the invention, multiple information is utilized; the multiples are fused into the reverse time migration process; earthquake record wave fields of primaries and the multiples are utilized to carry out imaging. Compared with the prior art, the method disclosed by the invention has the advantages that the multiple pre-salt imaging can be implemented; the underground illumination level which has a larger range and is more balanced is achieved; and the resolution ratio of the pre-salt imaging is greatly improved. The earthquake multiple migration method can be widely used in the field of oil-gas exploration and particularly has a more obvious effect on the imaging of a pre-salt structure.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI

Illuminating unit and projection-type image display apparatus employing the same

An illuminating unit with a compact design which is capable of improving collimating characteristics of beams emitted from a plurality of light sources positioned at different locations, and a projection-type image display apparatus employing the illuminating unit. The illuminating unit includes a base, a plurality of light sources that are positioned at different locations on the base to emit beams of different wavelength bands, and at least one color filter with a predetermined curvature to reflect one or more beams of predetermined wavelengths from among the beams emitted by the plurality of light sources such that the reflected one or more beams propagate in a first direction and to pass one or more remaining beams of other wavelength bands. In the illuminating unit, the beams of different wavelength bands emitted by the plurality of light sources are combined to emit a combination of these beams in the first direction. The projection-type image display apparatus includes the illuminating unit, an optical integrator to receive a collimated beam from the illuminating unit and to make a uniform therefrom, an image-forming system to receive the uniform beam from the optical integrator and to produce an image by selectively reflecting the uniform beam, a beam splitter disposed in an optical path between the illuminating unit and the image-forming system to change the optical path of incident beams such that a beam incident from the illuminating unit is directed toward the image-forming system while a beam incident from the image-forming system is directed toward a screen, and a projection lens unit disposed adjacent to the beam splitter opposite the image-forming system to enlarge the image produced by the image-forming system and to project the enlarged image onto the screen.
Owner:SAMSUNG ELECTRONICS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products