Efficient adaptive motion estimation algorithm based on motion intensity
利用运动强度判据的高效自适应运动估计算法

In order to reduce the complexity of motion estimation and improve the efficiency of the video encoder,an adaptive motion estimation search algorithm based on motion intensity is proposed.Motion intensity reflects the intensity of motion between adjacent frames.By defining the concept of motion intensity,the movement of the next frame is predicted based on the measured intensity information of the current frame,and a different motion search algorithm is selected adaptively.If the motion intensity of the current frame is greater than the threshold,the UMHexagonS search algorithm is chosen,otherwise the improved hexagon search algorithm is chosen.Simulation results show that the coding efficiency is improved significantly,while the image quality and compression performance change little.In addition,the threshold of motion intensity in the algorithm is adjustable,thus the demands of different encoding can be met by changing the threshold.