A non-blocking processing method for teaching blackboard writing
A processing method and unoccluded technology, applied in the field of information processing, can solve problems that affect learners' sense of experience, inability to store and share blackboard writing information, partial occlusion of video, etc., and achieve the effect of facilitating clear learning and a good learning experience environment
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[0038] Such as Figure 1-4 Shown, a kind of unoccluded processing method of teaching blackboard writing, comprises the following steps:
[0039] Step 1: Obtain the original recording video information, the original recording video information is the video information when recording the blackboard;
[0040] Step 2: Extract the blackboard area in the recorded video information, and extract effective edges; the process of extracting effective edges is as follows:
[0041] SS1: First extract the four corners of the black border, such as figure 1 As shown, in the above process, the blackboard area is extracted, and the effective edge is further extracted; after that, the minimum circumscribed circle of the edge of the blackboard area is calculated; according to the geometric model such as figure 2 As shown, at least three vertices are tangent to the circumscribed circle, assuming point 1, point 2 and point 3, now find point 4;
[0042] SS2: Determine the two vertices on the dia...
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