The invention discloses an
emotion detection method based on spatial-temporal
feature fusion of facial key points, and belongs to the field of
computer vision and emotion calculation. The method comprises the following steps: acquiring a public
data set and preprocessing the public
data set to obtain 68 facial landmarks; designing a PLK
algorithm to estimate the motion state of a facial
landmark, and denoising the
landmark through a bidirectional
optical flow mechanism and Kalman filtering to obtain accurate
landmark position information; modeling is carried out on the obtained accurate absolute position and
relative change of the facial landmark through a BiGRU unit, and
time sequence features of the facial landmark are extracted; constructing a face key
point graph structure, and sending the face key
point graph structure into a graph convolutional network in combination with the
time sequence features of the face landmarks for iterative updating to obtain space-time fused face features; and sending the obtained space-time fused facial features into a
linear layer for classification to obtain an
emotion recognition result. According to the method, comprehensive extraction of
time sequence features and space features related to the emotion is realized, and an efficient and high-accuracy method is provided for detection of the facial emotion.