Accurate Key Frame Extraction Algorithm of Video Action for Aerobics Online Teaching

Due to the current video key frame extraction algorithm is affected by the lens conversion, the extraction accuracy is poor. For this reason, a precise extraction algorithm of video action key frames for online aerobics teaching is studied. According to the color components of the video color RGB space, in order to ensure that the color distance is suitable for human vision. A non-uniform quantized HSV space method is adopted, and a one-dimensional feature vector is introduced to convert the online teaching video of aerobics into a one-dimensional histogram of 72 bins, which realizes the segmentation of video shots and reduces the impact of shot conversion. Sort the gray values of the histogram pixels of the video after the segmentation is completed, and construct the dynamic frames of the aerobics online teaching video. Sequence search constructs the processing dynamic frame, extracts the feature vector of the video sequence, and uses the multi-layer core aggregation algorithm to extract the key frame of the video action according to the extracted feature vector. Experimental results show that the algorithm can effectively extract the key frames of aerobics video action, the fidelity of the extracted key frames is higher than 0.9, and the precision and recall are both higher than 99%.