The present invention relates to an image processing device and method, a surgical system, and a surgical member with which a position and an orientation of the surgical member for surgery of a subject can be easily grasped.
The present invention acquires a microscopic image (201) obtained by photographing the surgical member (121) inserted to the subject with a surgical microscope (112), estimates the relative posture of the surgical member in the subject on the basis of the acquired microscopic image (201), and outputs posture information (222, 223, 224) associated with the posture that has been estimated. The present invention can be applied to ophthalmic surgery, in which an intraocular endoscope or surgical tool is observed with a surgical microscope, for example.