Image processing system, image processing apparatus, and image processing method

1. An image processing system comprising:

a stereoscopic display device configured to display a stereoscopic image viewed by an observer stereoscopically by displaying a predetermined parallax number of parallax images; and

circuitry configured to, when generating the predetermined parallax number of parallax images from volume data that is three-dimensional medical image data on which a subject is depicted, perform control so as to change a parallactic angle between parallax images as a condition of rendering processing on the volume data for generating the parallax images on which the subject is depicted based on a shape of the subject portion according to a viewpoint position as the condition of the rendering processing and to display a predetermined parallax number of parallax images generated by the parallactic angle thus changed on the stereoscopic display device.

2. The image processing system according to claim 1 ,

wherein the circuitry is configured to change the parallactic angle between the parallax images based on a relationship between the shape of the subject portion and protrusion criticality that is criticality in a protruding direction of the stereoscopic image displayed on the stereoscopic display device.

3. The image processing system according to claim 1 ,

wherein the circuitry is configured to change the parallactic angle between the parallax images based on at least one of a geometric condition and an appearance condition set as a rendering condition for the subject portion.

4. The image processing system according to claim 3 ,

wherein the circuitry is configured to change the parallactic angle between the parallax images based on a distance from the center of gravity set in the subject portion for moving a viewpoint position as the geometric condition to an outline of the subject portion.

5. The image processing system according to claim 3 ,

wherein the circuitry is configured to change the parallactic angle between the parallax images based on a distance from a viewpoint to an outline of the subject portion calculated from the viewpoint and a direction of a line of sight, the viewpoint and the direction of a line of sight being set as the geometric condition.

6. The image processing system according to claim 3 ,

wherein the circuitry is configured to change the parallactic angle between the parallax images based on a viewing angle set as the geometric condition.

7. The image processing system according to claim 1 ,

wherein the circuitry is configured to control a rendering processor that performs rendering processing on the volume data so as to generate the predetermined parallax number of parallax images at the changed parallactic angle, and is configured to perform control such that an image group generated by the rendering processor is displayed on the stereoscopic display device.

8. The image processing system according to claim 1 ,

wherein the circuitry is configured to perform control such that an image group composed of the predetermined parallax number of parallax images at the changed parallactic angle is selected from an image group generated in advance by a rendering processor that performs rendering processing on the volume data and such that the image group thus selected is displayed on the stereoscopic display device.

9. The image processing system according to claim 8 ,

wherein the circuitry is configured to perform control such that the predetermined parallax number of parallax images at the changed parallactic angle is generated by interpolation processing using the image group generated in advance by the rendering processor that performs rendering processing on the volume data and such that an image group thus generated is displayed on the stereoscopic display device.

10. An image processing method comprising, when generating a predetermined parallax number of parallax images from volume data that is three-dimensional medical image data on which a subject is depicted, performing control, by circuitry, so as to change a parallactic angle between parallax images as a condition of rendering processing on the volume data for generating the parallax images on which the subject is depicted based on a shape of the subject portion according to a viewpoint position as the condition of the rendering processing and to display a predetermined parallax number of parallax images generated by the parallactic angle thus changed on a stereoscopic display device.