Patents by Inventor Lihui MAO

Lihui MAO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11749128
    Abstract: The disclosure provides an answer correction method and a device, including: determining the target test paper that matches the test paper to be corrected; marking the area of each answer in the test paper to be corrected as the first answer set, and marking the area of each answer in the target test paper as the second answer set; matching each answer area in the first answer set and the second answer set, and adjusting the position of the answer area in the first answer set on the test paper to be corrected; for each answer area in the second answer set, determining the target answer area in the first answer set according to the position information of the answer area on the target test paper, and correcting the answer in the determined target answer area according to the answer in the answer area. The disclosure can solve the problem in the related art that the accurate position of the answer filled by the student cannot be identified, thereby affecting the correction of the answer.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: September 5, 2023
    Assignee: Hangzhou Dana Technology Inc.
    Inventors: Tao He, Lihui Mao, Huan Luo, Mingquan Chen
  • Patent number: 11450081
    Abstract: An examination paper correction method and apparatus, an electronic device, and a storage medium are provided. The method includes: obtaining a first image of a standard examination paper; identifying an area and characters of each standard answer in the first image, and using a marking box to mark an answering area where each standard answer is located; determining position information of each marking box; obtaining a second image of an examination paper to be corrected; determining, according to the position information of each marking box of the first image, an answering area in the second image matching a position of the marking box, and using a marking box to mark the determined answering area; identifying characters of an answer to be corrected in each marking box of the second image; and comparing the characters of the standard answer with the characters of the answer to be corrected.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: September 20, 2022
    Assignee: Hangzhou Dana Technology Inc.
    Inventors: Tao He, Lihui Mao, Huan Luo, Mingquan Chen
  • Patent number: 11410407
    Abstract: A method and a device for generating a collection of incorrectly-answered questions are provided. The method includes: acquiring an image of a marked test paper (S101); recognizing regions of respective questions in the marked test paper according to a pre-trained first region recognition model (S102); recognizing a question whose marking result is incorrect in the marked test paper as an incorrectly-answered question according to a pre-trained incorrectly-answered question recognition model (S103); and storing the region of the incorrectly-answered question in an incorrectly-answered question database to generate the collection of incorrectly-answered questions (S104). The above solution may solve the problem of low efficiency in generating the collection of incorrectly-answered questions in the prior art.
    Type: Grant
    Filed: December 25, 2019
    Date of Patent: August 9, 2022
    Assignee: Hangzhou Dana Technology Inc.
    Inventors: Tao He, Lihui Mao, Huan Luo, Mingquan Chen
  • Publication number: 20220101030
    Abstract: An examination paper correction method and apparatus, an electronic device, and a storage medium are provided. The method includes: obtaining a first image of a standard examination paper; identifying an area and characters of each standard answer in the first image, and using a marking box to mark an answering area where each standard answer is located; determining position information of each marking box; obtaining a second image of an examination paper to be corrected; determining, according to the position information of each marking box of the first image, an answering area in the second image matching a position of the marking box , and using a marking box to mark the determined answering area; identifying characters of an answer to be corrected in each marking box of the second image; and comparing the characters of the standard answer with the characters of the answer to be corrected.
    Type: Application
    Filed: January 21, 2020
    Publication date: March 31, 2022
    Applicant: Hangzhou Dana Technology Inc.
    Inventors: Tao HE, Lihui MAO, Huan LUO, Mingquan CHEN
  • Publication number: 20220067416
    Abstract: A method and a device for generating a collection of incorrectly-answered questions are provided. The method includes: acquiring an image of a marked test paper (S101); recognizing regions of respective questions in the marked test paper according to a pre-trained first region recognition model (S102); recognizing a question whose marking result is incorrect in the marked test paper as an incorrectly-answered question according to a pre-trained incorrectly-answered question recognition model (S103); and storing the region of the incorrectly-answered question in an incorrectly-answered question database to generate the collection of incorrectly-answered questions (S104). The above solution may solve the problem of low efficiency in generating the collection of incorrectly-answered questions in the prior art.
    Type: Application
    Filed: December 25, 2019
    Publication date: March 3, 2022
    Applicant: Hangzhou Dana Technology Inc.
    Inventors: Tao HE, Lihui MAO, Huan LUO, Mingquan CHEN
  • Publication number: 20210225188
    Abstract: The disclosure provides an answer correction method and a device, including: determining the target test paper that matches the test paper to be corrected; marking the area of each answer in the test paper to be corrected as the first answer set, and marking the area of each answer in the target test paper as the second answer set; matching each answer area in the first answer set and the second answer set, and adjusting the position of the answer area in the first answer set on the test paper to be corrected; for each answer area in the second answer set, determining the target answer area in the first answer set according to the position information of the answer area on the target test paper, and correcting the answer in the determined target answer area according to the answer in the answer area. The disclosure can solve the problem in the related art that the accurate position of the answer filled by the student cannot be identified, thereby affecting the correction of the answer.
    Type: Application
    Filed: November 21, 2019
    Publication date: July 22, 2021
    Applicant: Hangzhou Dana Technology Inc.
    Inventors: Tao HE, Lihui MAO, Huan LUO, Mingquan CHEN