Abstract
In order to apply the K-means algorithm to the quantitative evaluation model of interactive whiteboard class, the automatic correction method of the natural scene text plane image in the interactive whiteboard class is put forward. This method makes full use of the whiteboard border line information, and completes the whiteboard correction through the Canny operator edge detection, the PPHT straight line extraction, the K-means algorithm linear clustering, H matrix transformation and other steps. Finally, experiments are carried out to test the performance of the algorithm. The research results show that the algorithm has a high success rate of correction for basic simple background and simple content whiteboard, and the algorithm performance is relatively stable. It can be seen that the K-means algorithm has broad application prospects in the quantitative evaluation model of interactive whiteboard classroom.
Highlights
In the late last century, the blackboard chalk teaching has always been a necessary media tool in the current classroom teaching
The limitations of board books are relatively large, and the introduction of multimedia documents such as pictures, audio and audio in classroom teaching can only rely on other media to support the classroom teaching activities
The three-dimensional correction is realized by the perspective transformation, and the recognition test and analysis of the Chinese characters in the corrected image are carried out
Summary
In the late last century, the blackboard chalk teaching has always been a necessary media tool in the current classroom teaching. The characteristics of the blackboard flexible writing can highlight its guiding role in the process of teaching content in the changeable classroom teaching environment, and make the teachers' explanation and body language well cooperate and play. The writing whiteboard has not been widely used in the basic education environment because it needs the erasers of the whiteboard, the imprint on the whiteboard is difficult to eliminate, and the writing pen is easier to volatilize. Whiteboard usually refers to the writing plane made of white metal plate material. It is a writing tool that can be repeatedly erased, usually used for teaching, meeting discussion, or personal and family notes.
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