The invention relates to the technical field of surgical navigation, in particular to a children
urinary system endoscopic surgery visual auxiliary operation
system which comprises a respiratory
displacement field generation module, a tissue stiffness inversion module, a
visual scale correction module, a tangential gradient calculation module and an anisotropic registration correction module. According to the method, a
respiration displacement field is analyzed to invert tissue
hardness parameters, a preoperative
physical model with biomechanical characteristics is constructed, non-rigid deformation behaviors of kidneys and ureters of children in a stress state are simulated, the physical depth of pixels is calculated in combination with
endoscopic image characteristics, sparse feature
point cloud is converted into real-scale spatial data, and the spatial depth of the kidneys and ureters of the children is calculated. And according to the tangential gradient change of the path, constructing an anisotropic weight matrix to dynamically adjust the registration constraint intensity, and driving the
virtual model to follow the movement track of the
endoscope to carry out adaptive deformation correction, so that real-time three-dimensional
visual guidance for
soft tissue respiratory movement and contact deformation is realized.