Abstract:Neuropsychological tests can objectively evaluate the severity of cognitive impairment, which is an effective means to detect disease progression and evaluate drug efficacy. Comprehension test is an important part of cognitive impairment assessment of the elderly, which performs assessment by whether the subjects make accurate actions according to the instructions. It is also conducive to the early prevention and early intervention of dementia. A video analysis method of human posture estimation for comprehension detection in neuropsychological testing is proposed. The coordinates of key points of human body are extracted based on OpenPose. Then, based on the image morphology processing technology and Fast R-CNN, a two-dimensional coordinate extraction method is proposed for the key points of the specified target objects such as paper and toothbrush. Also, the mathematical model of human posture estimation is established. Finally, six actions of neuropsychological test are tested to verify the effectiveness. The results show that the proposed mathematical model of posture estimation and interactive action recognition method can effectively detect human posture action commands and interactive instructions.