1. A depth image-based representation (DIBR) method of modeling a 3-dimensional (3D) object, by which the 3D object is expressed by depth information, color information, and camera parameters or geometry information, the method comprising: modeling and/or rendering the 3D object according to the camera parameters; while the modeling and/or the rendering of the 3D object is performed, changing values of a plurality of different camera parameters, wherein the camera parameters comprise position, orientation, ranges of camera view or angle (fieldOfView), front and back of a camera volume (nearPlane and farPlane) and projection information(orthographic) on whether an object is projected on a camera orthographically or perspectively, by a modeling and/or rendering apparatus, in real time; and generating DIBR data reflecting values of the different camera parameters changing in real time by changing a field type in at least one of an MPEG DepthImage node and a DepthImage V2 node to a field type that reflects the values of the different camera parameters changing in real time; wherein each of the field types of a data structure expressing the camera parameters that are changed in real time is set to exposedField to indicate that the field is capable of being changed in real time; wherein the data structure expressing the camera parameters is an MPEG DepthImage node of data type SF3DNode or a DepthImage V2 node of data type SF3DNode.