Recording method, device, equipment and storage medium for blackboard writing process

Recording method, device, equipment and storage medium for blackboard writing process

  • CN 107,529,031 B
  • Filed: 08/18/2017
  • Issued: 06/11/2021
  • Est. Priority Date: 08/18/2017
  • Status: Active Grant
First Claim
Patent Images

1. A method of recording a writing process, comprising:

  • acquiring voice information in the writing process, and acquiring and storing writing images of a writing board based on a preset period;

    mapping the acquisition time of the blackboard-writing image to a time axis of the voice information;

    saving the voice information and the blackboard-writing image based on the time axis association so as to generate a blackboard-writing recording file which continuously outputs the voice information and the blackboard-writing image based on the time axis during playing;

    wherein, gather the speech information of blackboard writing in-process to the blackboard writing image of writing board is gathered and is preserved based on preset cycle, includes;

    collecting voice information in the process of writing on a blackboard and generating a time axis of the voice information;

    the time axis is generated according to the acquisition time of the voice information;

    storing an initial writing image of the writing board, acquiring a temporary writing image of the writing board based on a preset period, and comparing the similarity of the temporary writing image with a newly stored writing image;

    if the similarity between the temporary blackboard-writing image and the latest stored blackboard-writing image is smaller than a first threshold value, storing the temporary blackboard-writing image as a blackboard-writing image and recording the acquisition time;

    the mapping of the acquisition time of the blackboard-writing image to the time axis of the voice information comprises;

    confirming the corresponding relation between the time axis of the voice information and the system time, and confirming the corresponding relation between the acquisition time and the time axis according to the corresponding relation between the acquisition time and the system time;

    mapping the acquisition time of the blackboard-writing image to the time axis of the voice information based on the corresponding relation between the acquisition time and the time axis;

    deleting the collected invalid information and a time axis corresponding to the invalid information;

    the writing board is a blackboard, images are shot through a camera facing the surface of the writing board to collect writing images and are displayed in the electronic whiteboard, and the electronic whiteboard displays the previous writing content erased by the blackboard.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×