Research On Automatic Indexing Technology Of Knowledge Processing Points In Middle School Algebra

The rapid development of information technology, the digital teaching resources have been greatly promoted. After 10 years of digital learning plan America in primary and middle schools, statistics USA National Digital Learning Center analysis shows that, the off-line learning is to improve the learning effect of students’ learning and the use of digital teaching video. The construction of digital teaching resources in China has been paid more and more attention, The off-line teaching video is a presentation of digital teaching resources, In order to let the students through the off-line repeatedly watch the teaching video effectively grasp the knowledge points, this article carries on the analysis to the knowledge points in teaching the video content, the establishment of knowledge points index directory, click on the corresponding index entry for students learning the knowledge point of view, drag the video player to avoid tedious slider to locate the need to repeatedly watch learning content.How to establish the index corresponding teaching video content knowledge, this paper carries on the corresponding research. First, the size and level of high school algebra knowledge point of division, through the establishment of knowledge granularity to high school algebra knowledge points database. Second, the definition of the new features Chinese characters, Chinese characters stroke endpoints, corner points and cross points and Chinese characters between strokes constitute the "hole" geometric center point extraction, to extract this merger and removal operations, build feature library. Third, using the frame difference method of key frame extraction in video. Fourth, for the division and character segmentation using horizontal projection and vertical projection method Chinese characters; Fifth, corresponding to the characteristics of the new characteristics of Chinese characters Chinese characters and features extracted in the value recognition, matching to identify the Chinese characters and dictionary entries in the directory index, establishing knowledge through the corresponding index entry, click on the corresponding video frame. The index entry of teaching video content automatic index tracking, can improve the efficiency of the use of algebraic video teaching students.