公开(公告)号：US11721229B2

公开(公告)日：2023-08-08

申请号：US16756468

申请日：2019-09-11

Applicant: Hangzhou Dana Technology Inc.

Inventor： Fan Shi ,  Tao He ,  Huan Luo ,  Mingquan Chen

IPC: G06N3/08 ,  G06F16/245 ,  G09B7/02 ,  G06F40/284 ,  G06N3/04 ,  G09B19/02 ,  G06V30/40 ,  G06F18/21 ,  G06V30/14 ,  G06V30/148 ,  G06V30/19 ,  G06V10/82 ,  G06V30/413

CPC classification number: G09B7/02 ,  G06F16/245 ,  G06F18/21 ,  G06F40/284 ,  G06N3/04 ,  G06N3/08 ,  G06V10/82 ,  G06V30/1444 ,  G06V30/153 ,  G06V30/19173 ,  G06V30/40 ,  G06V30/413 ,  G09B19/025

Abstract: The present disclosure provides a question correction method and device for oral calculation questions. The feature vector of the question to be searched is obtained according to the content of token in the stem of each question to be searched, and then the feature vector of each question to be searched is used to search for the target test paper that matches the test paper to be searched in the question bank. For the question to be searched in the form of oral calculation question, a second search is performed in the target test paper based on the feature vector of the question, and the search criterion is the minimum shortest editing distance. If the question type of the matched target question is also an oral calculation question, it is determined that the question to be searched is the oral calculation question to be corrected, then a preset oral calculation engine is used to calculate the oral calculation question to be corrected and the calculation result is output as the answer to the oral calculation question to be corrected. By applying the solution provided by the present disclosure, the accuracy of correction on oral calculation questions can be improved.

公开(公告)号：US11521506B2

公开(公告)日：2022-12-06

申请号：US16705204

申请日：2019-12-05

Applicant: Hangzhou Dana Technology Inc.

Inventor： Tao He ,  Huan Luo ,  Mingquan Chen

IPC: G09B7/02 ,  G09B7/04 ,  G06N3/02 ,  G09B19/02 ,  G06V30/412 ,  G06V30/413

Abstract: The disclosure provides a calculation practicing method, a system, an electronic device and a computer readable storage medium, the calculation practicing method includes: providing a calculation question; identifying the type and content of the calculation question; generating an answer area according to the type and content of the calculation question; receiving an answering operation in which the user inputs the answer string for the calculation question in the answer area; identifying the answer string inputted by the user; and determining whether each of the answer characters in the answer string is correct, if there is an incorrect answer character, it will be marked, so that the calculation practice can be realized through the electronic device, which is convenient for students to carry out training.

公开(公告)号：US11450081B2

公开(公告)日：2022-09-20

申请号：US17425331

申请日：2020-01-21

Applicant: Hangzhou Dana Technology Inc.

Inventor： Tao He ,  Lihui Mao ,  Huan Luo ,  Mingquan Chen

IPC: G06V10/22 ,  G06T7/70 ,  G06V10/40 ,  G06V30/10

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.

公开(公告)号：US11749128B2

公开(公告)日：2023-09-05

申请号：US16957110

申请日：2019-11-21

Applicant: Hangzhou Dana Technology Inc.

Inventor： Tao He ,  Lihui Mao ,  Huan Luo ,  Mingquan Chen

IPC: G09B7/02 ,  G06F16/903 ,  G06F16/901 ,  G06V30/418 ,  G06V30/19 ,  G06V30/146 ,  G06V10/82 ,  G06V30/414 ,  G06V30/10

CPC classification number: G09B7/02 ,  G06F16/9024 ,  G06F16/90335 ,  G06V10/82 ,  G06V30/1475 ,  G06V30/19093 ,  G06V30/414 ,  G06V30/418 ,  G06V30/10

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.

公开(公告)号：US11823358B2

公开(公告)日：2023-11-21

申请号：US17791220

申请日：2020-12-29

Applicant: Hangzhou Dana Technology Inc.

Inventor： Tao He ,  Huan Luo ,  Mingquan Chen

IPC: G06T5/00 ,  G06V30/244 ,  G06V30/18 ,  G06V30/42 ,  G06V30/162 ,  G06V30/148 ,  G09B3/02

CPC classification number: G06T5/005 ,  G06V30/15 ,  G06V30/162 ,  G06V30/1801 ,  G06V30/2455 ,  G06V30/42 ,  G06T2207/30176 ,  G09B3/02

Abstract: A handwritten content removing method and device and a storage medium. The handwritten content removing method comprises: acquiring an input image of a text page to be processed, the input image comprising a handwritten region, which comprises a handwritten content (S10); identifying the input image so as to determine the handwritten content in the handwritten region (S11); and removing the handwritten content in the input image so as to obtain an output image (S12).

公开(公告)号：US11410407B2

公开(公告)日：2022-08-09

申请号：US17418238

申请日：2019-12-25

Applicant: Hangzhou Dana Technology Inc.

Inventor： Tao He ,  Lihui Mao ,  Huan Luo ,  Mingquan Chen

IPC: G06V10/22 ,  G06F16/35 ,  G06F16/332 ,  G06V10/75

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.

公开(公告)号：US11508251B2

公开(公告)日：2022-11-22

申请号：US16580254

申请日：2019-09-24

Applicant: HANGZHOU DANA TECHNOLOGY INC.

Inventor： Tao He ,  Huan Luo ,  Mingquan Chen

IPC: G09B7/02 ,  G06N3/08

Abstract: A method and a system for intelligent identification and correction of a question, which implements, through artificial intelligence, automatic identification of stems of various types of questions and contents of answering in test papers and auto-corrects the contents of answering. The technical solution is: to train a neural network model (e.g., CNN model) into a model for question type recognition based on numerous test paper samples in advance, and to use this trained model to detect the position of individual questions, the type corresponding to the question, the different components of the question (stem, answer, picture) in the test paper, and then to identify the printed font character information of the stem and the handwriting font character information of the answer part based on the recognition model, and finally to auto-correct based on the identified character information.