Provided are an image processing device, a stereoscopic image display device, and an image processing method with which it is possible to improve the visibility of a stereoscopic image of an area of interest, which should be brought to the attention of a user, from among volume data. An image processing device according to an embodiment of the present invention is provided with a setting unit, a controller, and a generating unit. The setting unit sets an area of interest which should be brought to the attention of a user from among 3D volume data related to a medical image. The controller performs, on the basis of positional information related to the area of interest, at least (1) depth control, in which a depth range expressing the depth of the area of interest stereoscopically displayed on a display for displaying stereoscopic images is set to a value closer to the possible stereoscopic-display range, i.e. the range in the depth direction in which the display is capable of displaying stereoscopic images, than the depth range before the area of interest was set, and/or (2) positional control, in which the display position of the area of interest is set to a position which is close to a display surface, i.e. a surface which when viewed stereoscopically is not located on the depth side and does not jump out to the front. The generating unit generates a stereoscopic image of the volume data in accordance with the control result of the controller.L'invention porte sur un dispositif de traitement d'image, un dispositif d'affichage d'image stéréoscopique et un procédé de traitement d'image au moyens desquels il est possible d'améliorer la visibilité d'une image stéréoscopique d'une zone d'intérêt, qui devrait être portée à l'attention d'un utilisateur, parmi des données volumiques. Un dispositif de traitement d'image selon un mode de réalisation de la présente invention comprend une unité de réglage, un contrôleur et une unité de génération. L'unité de réglage règle une
