352 results about "Ultrahigh resolution" patented technology

The invention discloses a method for splicing a high-definition image panorama of a high-pressure rod tower on the basis of an ORB (Object Request Broker) feature point. The method comprises the following steps: 1) reading ultrahigh resolution high-pressure rod tower images of which the sizes are W*H, and sampling and reducing the to-be-spliced ultrahigh resolution images by utilizing a bilinear interpolation method, thereby obtaining a w*h image, wherein W, H, w and h are integers greater than 0 and k is the integer greater than 0; 2) utilizing an ORB algorithm to extract features of all the sampled images; 3) roughly matching the ORB features extracted in the step 2); 4) utilizing matching point pairs extracted in the previous step to extract the ORB features again in an image block in which the matching point pairs of an original ultrahigh resolution image are located, thereby finely matching; 5) calculating a transformational matrix H between adjacent images through the solved matching point pairs; and 6) utilizing a gradually fading method to fuse the adjacent ultrahigh resolution images. According to the method, the seamless splicing for the ultrahigh resolution images is realized, the time for splicing is reduced, the splicing efficiency is increased and the beneficial effect on the high-definition image is achieved.

The invention discloses a multi-video real-time panoramic fusion splicing method based on a CUDA. The splicing method includes the step of system initialization and the step of real-time video frame fusion, wherein the step of system initialization is executed at the CPU end of the CUDA, and the step of real-time video frame fusion is executed at the GPU end; according to CUDA-based stream processing modes S21, S22, S23 and S24, four concurrent processed execution streams are set up at the GPU end, and S21, S22, S23 and S24 are deployed to corresponding stream processing sequences. Compared with the prior art, the multi-video and real-time panoramic fusion splicing method has the following advantages that multi-video real-time panoramic videos without ghost images or color brightness difference are achieved, the ultrahigh-resolution overall monitoring effect on large-scale scenes such as an airport, a garden and a square is remarkable, and the application prospect is wide.

The invention relates to an ultrahigh-resolution agile SAR satellite sliding spotlight mode system parameter design method, is applicable to flexible realization of the ultrahigh-resolution imaging SAR satellite sliding spotlight mode system parameter design through whole satellite attitude, and belongs to the technical field of overall design of SAR satellites. According to the method, an accurate orbit, an earth model, system restriction factors, and imaging work characteristics of the sliding spotlight mode are fully considered, an ultrahigh-resolution agile SAR satellite sliding spotlight mode system parameter design method is provided, and an economic and high-efficiency realization method is provided for the ultrahigh-resolution satellite-borne SAR imaging; and the criterion of uniform-beam footprint ground slide speed is employed, ground aiming points of all moments within the whole imaging time are designed, parameters such as the attitude requirement and PRF at an instantaneous moment are calculated, and compared with the conventional method for calculating the parameters according to the mode far away from ground virtual aiming points, the method is higher in precision and imaging efficiency.

The invention provides a device and a method for splicing multiple screens. The device comprises an imaging module provided with a high-speed computer exchange interface, a computer, an exchanging device and at least one display module provided with the high-speed computer exchange interface; wherein, the image data segmented by the imaging module is transmitted to the corresponding display module by the exchanging device; and the segmented image data is sent to the corresponding splicing unit for displaying by the display module. In the technical scheme of the invention, the imaging module and the display modules are provided with high-speed computer exchange interfaces capable of providing bandwidth high enough for data transmission, thereby ensuring the high resolution and good real-time performance of the final images to be displayed; and the invention is capable of outputting ultrahigh-resolution images and has good real-time performance.

The invention discloses a mine multi-camera video fusion method based on GPU and CPU cooperative computing and belongs to the mine multi-camera video fusion method. The method is characterized in that a GPU and CPU cooperative computing model is established, and thus current situation of poor real-time performance of an existing video fusion method is relieved; automatic matching is carried out by utilizing features of overlapped regions between adjacent video sources to determine relative position relation of the video sources, so that positions of cameras do not need to be assigned in advance, and automatic integration is realized; camera parameter bundle adjustment estimation and automatic alignment are carried out, so that the problem of deformation of panorama images after fusion is solved; and an exposure compensation and multiband fusion method is adopted, and finally, an ultrahigh-resolution large-visual angle mine mining (extraction) working face large-scale scene real-time integral video is generated, so that the method plays an important role for improving coal mining work efficiency and guaranteeing coal mine safety production. The advantages are that the multi-camera video fusion method utilizes the existing cameras of a coal mine fully to generate the mine mining (extraction) working face panorama video, thereby reducing equipment investment and improving safety of coal mine production.

The invention discloses a multi-screen video synchronous playing method and device. The method comprises the steps that an ultrahigh-resolution-ratio video source is divided into small equant videos to be placed on different node computers, video data are converted into YUV image sequences, and the same number is used for identifying the same frame of sequences of all the small videos; a YUV file is generated from the YUV image sequences; a main control computer sends instructions to all the node computers to enable all the node computers to play the videos at the same moment; a camera starts to synchronously shoot a whole video picture and analyze the numbers of frames; when the frames with different numbers exist, the main control computer sends instructions to the node computer with the different frames to correct the serial numbers of the frames needing to be played, and the image sequences of the frames needing to be played are extracted from the node computer so as to achieve the purpose that the numbers of all the frames of the same picture are uniform. According to the multi-screen video synchronous playing method and device, manual video synchronization pre-adjustment is not needed, synchronous video playing is made to be intelligent, the speed at which the frames are played is stable, when the frames are asynchronous, the corresponding frames can be selected quickly to be played, and the trouble of video suspending and replaying is saved.

The invention discloses an ultra-wideband spectrum detection method of an ultrahigh resolution spectral-domain OCT and a system. Low-coherence light emitted from a broadband light source enters a broadband optical fibre coupler through a photoisolator, and respectively enters a scanning probe and a reference arm after light splitting; returned light is processed through interference in the broadband optical fibre coupler; and interference signals are transformed into different spectrums in a detection arm, the spectrums are processed after being transmitted into a computer, and an image is reconstructed through inverse Fourier transform. A double grating is introduced into the detection arm to generate orthogonal chromatic dispersion, and a DMD and an area array CCD are utilized to realize the fast parallel detection of the ultra-wideband spectrum at the same time. A double grating system can reduce the field coverage of a spectral imaging system, and solve the problems such as field curvature, spectrum interference and the like during imaging of large field coverage spectrum; and the DMD increases the range of the CCD spectrum measurement with finite scales and finite pixel numbers and the resolution response of the spectrum measurement, and realizes the super resolution detection of the ultra-wideband spectrum at the same time, thereby realizing high Signal-to-Noise and ultrahigh resolution spectral-domain OCT imaging.

The invention is suitable for the field of image processing, and provides a method and a device for realizing multi-video signal image composition. The method comprises the following steps of: receiving image composition requirement information of a user; compositing multi-path images through multiple cascaded image synthesis plate cards according to the image composition requirement information; and receiving a composite image signal of the last stage of image composition plate card, and outputting a composite image signal code, wherein the image composition requirement information comprises a video input interface of each path of composite image, a picture composition mode as well as the position of each path of independent video image display in the picture composition mode. The device provided by the invention can expand composition numbers and paths at will, can support video input signals of different kinds, realizes the composition of an image with ultrahigh resolution, reduces the dependency on hardware, and realizes flexible allocation of multiple composite modes.

The invention relates to a mura treatment method specific to an ultrahigh resolution panel. The method includes steps of S10, shooting actual mura state of the whole panel regionally by an industrial camera according to the resolution rate of the industrial camera; when one zone of the shooting panel is displays a gray scale, the rest zones of the panel display 0 gray scale; step 20, acquiring mura compensation data matrix of every zone of the panel according to corresponding relationship between the gray scale and brightness of the panel acquired in advance and actual mura state of every zone of the panel; step 30, combining the mura compensation data matrixes of every zone of the panel to acquire the mura compensation data matrix corresponding to the whole panel; selecting corresponding mura compensation data according to the compensation data reference value position. The mura treatment method specific to the ultrahigh resolution panel uses the specification of the industrial camera of the existing mura compensation system reasonably, realizes the accurate mura compensation of the ultrahigh resolution panel, and reduces the high cost for replacing the industrial camera specification in the mura compensation system.

The invention relates to the field of video information processing and particularly discloses a video synchronization method based on camera photographing. The method includes the steps that an ultrahigh-resolution video source is divided into equal small videos to be placed on different node computers, and the identical frames of all the small videos are marked by an identical serial number; a main control computer connected with a camera sends commands to all the node computers to enable all the node computers to start to play the videos at the same time; the camera starts to photograph the whole video frames synchronously, and whether the series numbers of all the frames are consistent is analyzed; when the serial numbers of certain frames are inconsistent, the main control end sends commands to the node computers with the frames inconsistent to modify the refresh rates of the node computers, and the refresh rates are modified continuously until the serial numbers of the frames of all the node computers reaching the identical frames are consistent. According to the method, the serial numbers of the whole frames of the videos are photographed through the camera and judged whether to be consistent or not and then judged whether to perform video synchronization processing or not, and thus manual intervention is reduced; communication can be carried out without a network, the multi-computer synchronization problems caused by network communication abnormality and network response abnormality are greatly reduced.

The present invention discloses an FPGA (Field Programmable Gate Array) realization method of a SAR (Synthetic Aperture Radar) signal processing algorithm, belonging to the radar imaging and digital signal processing technology field. The method comprises: building hardware configuration of an upper computer, an Ethernet data communication module, an algorithm processing module, a DDR3 SDRAM and a control module thereof, a data selection module, a reset module, a clock management module, the algorithm processing module is provided with a polar coordinate format imaging algorithm of dechirp signals based on the Chirp Scaling principle and a two-dimensional self-focusing algorithm, and therefore the problem of high resolution ratio imaging of a mini-type SAR system and the ultrahigh resolution imaging processing of SAR etch signals are realized.

The invention relates to the field of video monitoring, and discloses a real-time transcoding method and apparatus, and a real-time decoding method and apparatus. In the invention, the real-time transcoding method comprises the following steps: segmenting a complete image into N sub-images, N being an integer greater than or equal to 2; and coding the N sub-images in parallel in real time in multiple processors or multiple processor cores and then packaging them together, position information of each sub-image being included. According to the invention, an ultrahigh-resolution image is segmented into the multiple sub-images and then parallel real-time coding is carried out on the multiple sub-images, such that multiple CPUs or multi-core PCUs can be fully utilized to finish real-time transcoding of the ultrahigh-resolution image.