In a three-dimensional image display method, a processor acquires first three-dimensional data and second three-dimensional data of a subject from a recording medium. The processor converts a first three-dimensional coordinate system of the first three-dimensional data and a second three-dimensional coordinate system of the second three-dimensional data into a three-dimensional common coordinate system on the basis of structure information related to a geometric structure of the subject. The processor displays an image of the first three-dimensional data in the common coordinate system and an image of the second three-dimensional data in the common coordinate system on a display.

An image processing apparatus obtains information that on a first video and a second video at least one of which is a captured video obtained by an image capturing apparatus, the information related to the first and second videos includes information on first and second viewpoints corresponding to the first and second videos of a same timing. The image processing apparatus, in a case where switching a video to be outputted from the first video to the second video, generates information on a virtual viewpoint corresponding to a period from an end of output of the first video until a start of output of the second video, based on the obtained information on the first viewpoint corresponding to the period and the obtained information on the second viewpoint corresponding to the period.

An image processing apparatus obtains information that on a first video and a second video at least one of which is a captured video obtained by an image capturing apparatus, the information related to the first and second videos includes information on first and second viewpoints corresponding to the first and second videos of a same timing. The image processing apparatus, in a case where switching a video to be outputted from the first video to the second video, generates information on a virtual viewpoint corresponding to a period from an end of output of the first video until a start of output of the second video, based on the obtained information on the first viewpoint corresponding to the period and the obtained information on the second viewpoint corresponding to the period.

Provided is a method for transmitting metadata for omnidirectional content including a plurality of viewpoints. The method comprises identifying the metadata for the omnidirectional content including the plurality of viewpoints; and transmitting the identified metadata, wherein the metadata includes information about an identifier (ID) of a viewpoint group including at least one viewpoint of the plurality of viewpoints, and wherein the at least one viewpoint in the viewpoint group shares a common reference coordinate system.

Methods and devices are provided for encoding, transmitting and decoding 3DoF+ volumetric video. At the encoding stage one input view (among all the input ones) is selected to convey the viewport dependent light effect and its id is transmitted to the decoder as an extra metadata. On the decoder side, when patches coming from this selected view are available for the rendering of the viewport, they are preferentially used regarding the other candidates whatever the view to synthesize position.

Methods and devices are provided for encoding, transmitting and decoding 3DoF+ volumetric video. At the encoding stage one input view (among all the input ones) is selected to convey the viewport dependent light effect and its id is transmitted to the decoder as an extra metadata. On the decoder side, when patches coming from this selected view are available for the rendering of the viewport, they are preferentially used regarding the other candidates whatever the view to synthesize position.

A display device is mounted on a vehicle. The display device comprises a display unit and a control unit A virtual screen is a two-dimensional plane at a predetermined distance away from an origin of a XYZ coordinate system along a Y coordinate axis, and is approximately parallel to an XZ plane defined by an X coordinate axis and a Z coordinate axis. The control unit is configured to calculate coordinates of a second point obtained as a result of projecting a first point in the XYZ coordinate system onto the virtual screen, convert the calculated coordinates of the second point into coordinates according to a display mode of the display unit, and cause the display unit to display an image corresponding to the second point at the converted coordinates.

A display device is mounted on a vehicle. The display device comprises a display unit and a control unit A virtual screen is a two-dimensional plane at a predetermined distance away from an origin of a XYZ coordinate system along a Y coordinate axis, and is approximately parallel to an XZ plane defined by an X coordinate axis and a Z coordinate axis. The control unit is configured to calculate coordinates of a second point obtained as a result of projecting a first point in the XYZ coordinate system onto the virtual screen, convert the calculated coordinates of the second point into coordinates according to a display mode of the display unit, and cause the display unit to display an image corresponding to the second point at the converted coordinates.

A method for displaying objects is provided. The method includes: acquiring a scene image and a plurality of object images of a target object; determining, based on a target viewing angle of the scene image, X reference viewing angles from the viewing angles corresponding to the plurality of object images, wherein each of the X reference viewing angles is adjacent to the target viewing angle in terms of spatial position; generating intermediate images corresponding to the X reference viewing angles by transforming, based on position difference information between the X reference viewing angles and the target viewing angle, positions of pixel points in object images corresponding to the X reference viewing angles, wherein each of the intermediate images indicates a display effect of the target object at the target viewing angle; and displaying the intermediate images superimposed on the scene image.

A method for displaying objects is provided. The method includes: acquiring a scene image and a plurality of object images of a target object; determining, based on a target viewing angle of the scene image, X reference viewing angles from the viewing angles corresponding to the plurality of object images, wherein each of the X reference viewing angles is adjacent to the target viewing angle in terms of spatial position; generating intermediate images corresponding to the X reference viewing angles by transforming, based on position difference information between the X reference viewing angles and the target viewing angle, positions of pixel points in object images corresponding to the X reference viewing angles, wherein each of the intermediate images indicates a display effect of the target object at the target viewing angle; and displaying the intermediate images superimposed on the scene image.