The application relates to the technical field of image recognition, in particular to a children
autism spectrum disorder stereotyped
behavior recognition system based on video images. The
system screens target pixel points from pixel points; determines a
motion intensity index according to a trajectory
point sequence of the target pixel points; converts the trajectory
point sequence of the target pixel points into a
motion vector sequence; determines direction similarity according to direction similarity between vectors; clusters the vectors based on the direction similarity, and identifies a target cluster; determines a motion regularity index according to the number of vectors in the target cluster and the direction similarity; determines a saliency index in combination with the
motion intensity index; clusters the target pixel points based on the saliency index, and sets a
region of interest; determines an enhancement weight according to the density of the target pixel points in the region and the saliency index; and determines a total enhancement demand value in combination with the gray scale and gradient features of the pixel points in the region; and reversely maps the total enhancement demand value into a
gamma correction parameter, so that the accuracy of recognition is improved.