Patents Assigned to ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
  • Publication number: 20200336710
    Abstract: A method for image acquisition may include receiving a video from a first video camera in a period, the video including a first view of a scene. The method may also include delineating a plurality of first regions within the first view of the scene. The method may further include determining an accumulated effect of at least one feature occurring within the period within at least one of the plurality of first regions. The method may further include directing a second video camera towards a second view of the scene based on the accumulated effect.
    Type: Application
    Filed: June 3, 2020
    Publication date: October 22, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventor: Lunqi ZHANG
  • Publication number: 20200329217
    Abstract: The present disclosure provides a system and method for generating a video synopsis. The method may include obtaining a video captured by a movable camera at a plurality of positions, the video including a sequence of video frames; determining, for each of at least part of the sequence of video frames, a position label of the video frame that indicates one of the plurality of positions of the movable camera; classifying the at least part of the sequence of video frames into a plurality of groups based on their position labels; determining one or more objects of interest in at least one of the plurality of groups; generating, for the at least one of the plurality of groups, a video synopsis based on the one or more objects of interest.
    Type: Application
    Filed: June 15, 2020
    Publication date: October 15, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Li SUN, Huadong PAN
  • Publication number: 20200327308
    Abstract: Systems and methods for face recognition are provided. The systems may perform the methods to obtain a neural network comprising a first sub-neural network and a second sub-neural network; generate a plurality of preliminary feature vectors based on an image associated with a human face, the plurality of preliminary feature vectors comprising a color-based feature vector; obtain at least one input feature vector based on the plurality of preliminary feature vectors; generate a deep feature vector based on the at least one input feature vector using the first sub-neural network; and recognize the human face based on the deep feature vector.
    Type: Application
    Filed: May 21, 2020
    Publication date: October 15, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Fuyun CHENG, Jingsong HAO
  • Publication number: 20200327643
    Abstract: A method for super-resolution image reconstruction may include obtaining an original image that has first resolution and includes a target object. The method may also include generating a first target image by increasing the first resolution of the original image. The method may also include determining first feature points relating to the target object based on the first target image. The method may also include determining first priori information relating to the target object based on the first feature points relating to the target object. The method may also include generating a second target image having second resolution higher than the first resolution based on the first priori information relating to the target object and the first target image.
    Type: Application
    Filed: May 29, 2020
    Publication date: October 15, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventor: Changjiu YANG
  • Publication number: 20200327309
    Abstract: A neural network-based image processing method may include receiving, by a trained neural network, a first image including a first object, the first object being partially covered by a second object. The method may also include generating, by the trained neural network, a second image based on the first image. The second image is a representation of the first image with the second object substantially removed, and the first object is a human face.
    Type: Application
    Filed: May 22, 2020
    Publication date: October 15, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Fuyun CHENG, Jingsong HAO, Gang WANG
  • Publication number: 20200326500
    Abstract: The present disclosure provides an image device. The image device may include a camera lens, one or more stepper motors to drive the camera lens, one or more H-bridge circuits configured to control at least one of the one or more stepper motors, and a lens-identification circuit connected with the one or more H-bridge circuits, wherein the lens-identification circuit includes an impedance network of which an impedance value corresponds to a type of the camera lens.
    Type: Application
    Filed: June 24, 2020
    Publication date: October 15, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventor: Wei WU
  • Patent number: 10805588
    Abstract: The present disclosure relates to systems and methods for image white balance adjustment. The systems may perform the methods to obtain a target image; determine a first lighting condition of the target image when the target image is captured; determine, based on the first lighting condition of the target image, a white balance gain of the target image; and adjust, based on the white balance gain, white balance of the target image.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: October 13, 2020
    Assignee: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventor: Tingniao Wang
  • Publication number: 20200314313
    Abstract: A system includes a storage device storing a set of instructions and at least one processor in communication with the storage device. When executing the instructions, the at least one processor is configured to cause the system to obtain a first operation mode of the optical filter and determine a brightness value of visible light of ambient light. The at least one processor may also cause the system to obtain a brightness threshold related to the first operation mode, compare the brightness value of the visible light of the ambient light with the brightness threshold, and determine whether a switching condition is satisfied based on the comparison result. Upon the determination that the switching condition is satisfied, the at least one processor may further cause the system to switch the first operation mode of the optical filter to a second operation mode.
    Type: Application
    Filed: June 15, 2020
    Publication date: October 1, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventor: Tingniao WANG
  • Publication number: 20200293793
    Abstract: A system for video surveillance includes an image sensor configured capture an image including a reference zone and a memory device that stores instructions. The system also includes one or more processors that are configured to execute the instructions to determine 3D coordinates of a target comprised in the image and determine 3D coordinates of the reference zone. The one or more processors are further configured to identify an event according to the 3D coordinates of the target and the 3D coordinates of the reference zone.
    Type: Application
    Filed: June 1, 2020
    Publication date: September 17, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Huadong PAN, Miao CHENG, Shizhu PAN, Xingming ZHANG
  • Publication number: 20200279357
    Abstract: A method and system for image processing are provided in the present disclosure. The method may include obtaining a plurality of source images generated by a plurality of imaging sensors. The method may also include processing each of the plurality of source images by: retrieving a plurality of source image blocks from the source image according to block position information associated with the corresponding imaging sensor; generating, for each of the plurality of source image blocks, a target image block based on the source image block; and forming a target image based on the generated target image blocks. The method may further include generating a combined image based on the target images.
    Type: Application
    Filed: May 17, 2020
    Publication date: September 3, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Yin WANG, Haomi WANG, Wei FANG
  • Publication number: 20200272808
    Abstract: A method for identifying one or more faces in an image may include determining a detection region in an image based on at least one of a plurality of detection scales, and identifying one or more faces in the detection region based on the at least one of the plurality of detection scales. The method may further include calibrating the detection region based on one or more identified faces.
    Type: Application
    Filed: May 14, 2020
    Publication date: August 27, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Bin WANG, Gang WANG
  • Publication number: 20200273149
    Abstract: The present disclosure relates to image processing systems and methods. The method may include obtaining a first image and a second image. The first image may be captured by a first camera lens of a panorama device and the second image may be captured by a second camera lens of the panorama device. The method may also include performing an interpolation based on a center of the first image to obtain a first rectangular image, and performing an interpolation based on a center of the second image to obtain a second rectangular image. The method may further include generating a fused image based on the first rectangular image and the second rectangular image, and mapping the fused image to a spherical panorama image.
    Type: Application
    Filed: May 9, 2020
    Publication date: August 27, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Chuan QIN, Chengzhe MENG
  • Publication number: 20200258201
    Abstract: The present disclosure relates to systems and methods for image sharpening. The systems and methods may obtain a target image to be processed, the target image including one or more target pixels to be processed. For each of the one or more target pixels, the systems and methods may select one or more previous pixels and one or more subsequent pixels along a predetermined direction in the target image; determine a first gray value based on the one or more previous pixels and a second gray value based on the one or more subsequent pixels; select a target gray value from the first gray value and the second gray value based on an initial gray value of the target pixel; and determine an adjusted gray value of the target pixel based on the initial gray value and the target gray value.
    Type: Application
    Filed: April 30, 2020
    Publication date: August 13, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Min CHENG, Keqiang YU
  • Patent number: 10742936
    Abstract: According to various aspects of the present disclosure, methods, systems, and media for object tracking are provided. In some embodiments, the systems may include: at least one hardware processor to: detect a target object in first image data provided by a first camera; determine a first plurality of neighboring cameras of the first camera that have detected the target object; determine at least one of the first plurality of neighboring cameras as a next node of the first camera; and generate first topological data for the first camera and the next node of the first camera.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: August 11, 2020
    Assignee: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Kunpeng Liu, Haibin Huang, Huimin Wu, Wei Li
  • Publication number: 20200252583
    Abstract: The present disclosure relates to systems and methods for signal transmission. The systems and methods may receive a composite multimedia signal, wherein the composite multimedia signal may be encoded in a frame format including an active zone and a blanking zone. The composite multimedia signal may be associated with a plurality of multimedia signals acquired by a plurality of acquisition devices. The systems and methods may insert one or more control signals in a predetermined section of the blanking zone. The systems and method may further transmit the one or more control signals to one or more target acquisition devices of the plurality of acquisition devices via a transmission medium.
    Type: Application
    Filed: April 20, 2020
    Publication date: August 6, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Zhaosheng DU, Genqiang CUI, Bingyun LYU, Wei FANG
  • Publication number: 20200243061
    Abstract: A method and system for operating a signal filter device are provided in the present disclosure. The signal filter device may include M adaptive filters, M first analysis filters, M second analysis filters, and a controller. M may be an integer above two. The method may include generating, by the M first analysis filters, M first sub-band signals based on an input signal. The method may also include generating, by the M second analysis filters, M second sub-band signals based on a reference signal. The method may further include adjusting, by the controller, the working states of the M adaptive filters based on correlations between the M first sub-band signals and the M second sub-band signals.
    Type: Application
    Filed: April 16, 2020
    Publication date: July 30, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Zhiyong SUN, Qi CHEN, Wei FANG
  • Publication number: 20200244939
    Abstract: A system and a method for processing images are provided. The method may include one or more of the following operations. An image including a plurality of channels and a plurality of pixels may be obtained, each pixel having a pixel value corresponding to one of the plurality of channels. One of the plurality of pixels may be selected as a pixel of interest, and the corresponding channel of the pixel value of the pixel of interest may be designated as a target channel. A plurality of pixels proximate to the pixel of interest may include at least two first reference pixels. For each first reference pixel, a pseudo pixel value for the target channel of the first reference pixel may be determined. Whether the image is a deteriorated image may be determined at least based on the pixel value of the pixel of interest and the determined pseudo pixel values.
    Type: Application
    Filed: April 20, 2020
    Publication date: July 30, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Chen LING, Dan ZHANG, Xin MA, Wei FANG
  • Publication number: 20200244977
    Abstract: A method for processing and transmitting multimedia signals received from a plurality of channels are provided. The method may include receiving at least two multimedia signals from a plurality of channels, and generating a composite multimedia digital signal by coding the multimedia signals in a frame format. At least one of the multimedia signals may include a video signal. The frame format may include an active zone and a blanking zone, the active zone may be configured to encode at least part of the multimedia signals, and the blanking zone may be configured to encode format information. The method may further include converting at least part of the encoded multimedia signals in the active zone into analog signals to generate a composite multimedia signal. The method may further include transmitting the composite multimedia signal to a receiving device via a transmission medium.
    Type: Application
    Filed: April 16, 2020
    Publication date: July 30, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Zhaosheng DU, Genqiang CUI, Bingyun LYU, Wei FANG
  • Patent number: 10726876
    Abstract: The present disclosure relates to systems and methods for replaying a video that includes positions of a video recording device. The method includes obtaining a target position of the video recording device corresponding to a target scene. The method further includes based on the target position, searching an index table associated with the video to determine a target index position of the video recording device, wherein the index table indexes a plurality of positions of the video recording device. The method further includes determining an offset address in the index table corresponding to the target index position. The method further includes obtaining a video clip including the target scene based on the offset address. The method still further includes replaying the target scene in the video clip.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: July 28, 2020
    Assignee: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Changhong Qin, Shengguo Cao, Shouyi Wang
  • Patent number: 10721409
    Abstract: The present disclosure relates to systems and methods for exposure control. The systems and methods may obtain a target frame brightness value of the image. The systems and methods may also obtain an exposure mode of the electronic device. The systems and methods may also obtain an exposure table corresponding to the exposure mode. The systems and methods may also determine a target value, corresponding to the target frame brightness value, for each of the one or more exposure parameters based on the exposure table. The systems and methods may also adjust one or more of the at least one lens, the at least one exposure-time controller, and the at least one sensor according to the target values of the one or more exposure parameters.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: July 21, 2020
    Assignee: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Yanfen Zhou, Runfa Pan, Liangcheng Li, Qianfeng Huang, Erli Lu, Mingzhu Chen