JP2007280014A - Display parameter input device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display parameter input device which sets a distance and the direction of a visual point relative to a three-dimensional CG model by using a similar technique to actual camera photography. <P>SOLUTION: When a magnetic sensor 120 specifies the current position and inclination by use of a magnetic force from a magnetic transmitter, a two-dimensional image creating means 130 creates a two-dimensional image such that a three-dimensional CG model stored in a three-dimensional CG model storage means 110 is projected to the current position and in the direction of a visual line according to the relationship between the position of the three-dimensional CG model and the current position and inclination specified by the magnetic sensor 120. The two-dimensional image is displayed in an image display means 140. When a parameter input instruction means 150 requests to input a display parameter under this condition, information on the position and inclination at that moment is stored in a display parameter storage means 160. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique for inputting suitable parameters when a two-dimensional image is obtained by projecting three-dimensional computer graphics.

Conventionally, a model of an object is generated by three-dimensional computer graphics (CG), and this is projected onto a predetermined plane to generate a two-dimensional image. In order to generate a two-dimensional image from a three-dimensional CG model, it is necessary to specify the distance to the model, the viewpoint direction, and the like. The two-dimensional image is generated by displaying on the screen while determining the preferable distance and viewpoint direction (see, for example, Patent Document 1).
JP 2002-107996 A

  However, the conventional method has a problem that it is difficult to perform intuitive setting because the distance and the viewpoint direction are set on a general-purpose computer. In particular, when acquiring a two-dimensional image for posting in an advertisement, etc., the sense of determining the distance and viewpoint direction will be asked, but when using a general-purpose computer, an intuitive operation is performed. There is a problem that it is difficult.

  Therefore, an object of the present invention is to provide a display parameter input device capable of setting a distance and a viewpoint direction with respect to a three-dimensional CG model by a method similar to that for shooting a real camera.

  In order to solve the above-described problems, the present invention is an apparatus for inputting display parameters of a CG model, and a three-dimensional CG model storage unit that stores a three-dimensional CG model in association with a predetermined position in real space, The three-dimensional CG model is obtained from the relationship between the position and inclination of the sensor, the position of the three-dimensional CG model stored in the three-dimensional CG model storage means, and the current position and inclination specified by the sensor. Two-dimensional image generation means for generating a two-dimensional image projected in the current position and line-of-sight direction, image display means for displaying the generated two-dimensional image, and an instruction to input the position and tilt information as display parameters Display parameter input device having parameter input instruction means for performing display parameter storage means for storing the set display parameters To provide.

  According to the present invention, using a portable display parameter input device equipped with a sensor, from the relationship between the current position and inclination specified by the sensor and the position of the three-dimensional CG model stored in advance in the real space, Since a two-dimensional image projected at the viewpoint position and direction is generated and displayed, and information on the position and tilt at the time when the input is instructed is stored, a three-dimensional CG is obtained in the same manner as in the real camera shooting. It is possible to set the distance and the viewpoint direction with respect to.

(1. Configuration of the device)
DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram of a display parameter input device according to the present invention. In FIG. 1, 100 is a display parameter input device, 110 is a three-dimensional CG model storage means, 120 is a magnetic sensor, 130 is a two-dimensional image generation means, 140 is an image display means, 150 is a parameter input instruction means, and 160 is a display parameter. It is a storage means.

  As shown in FIG. 1, the display parameter input device 100 includes a three-dimensional CG model storage unit 110, a magnetic sensor 120, a two-dimensional image generation unit 130, an image display unit 140, a parameter input instruction unit 150, and a display parameter storage unit 160. Composed. The three-dimensional CG model storage unit 110 is a storage unit that stores a three-dimensional CG model. The contents of the 3D CG model include data for specifying the model shape (model vertex coordinates, line segment, surface data, etc., or polygon data), texture for specifying the model material, color, pattern, etc., reflection Data such as rates are included. In the three-dimensional CG model storage unit 110, the three-dimensional CG model is stored in association with the position in the real space where the magnetic transmitter is installed. The magnetic sensor 120 has a function of identifying the position and inclination of the magnetic sensor 120 by detecting magnetism emitted from the magnetic transmitter. As such a magnetic sensor and a magnetic transmitter, FASTRAK manufactured by Pohimas, Inc. of the United States can be employed. The magnetic sensor 120 outputs the values in the X, Y, and Z directions in millimeters as position coordinates with the magnetic transmitter as the origin for the position, and the azimuth angle with respect to the magnetic transmitter as the origin for the inclination. Output the yaw, pitch, and roll angles in degrees.

  The two-dimensional image generation unit 130 obtains the current three-dimensional CG model from the relationship between the position of the three-dimensional CG model stored in the three-dimensional CG model storage unit 110 and the current position and inclination specified by the magnetic sensor 120. It has a function of generating a two-dimensional image projected in the position and line-of-sight direction. Specifically, processing for generating a two-dimensional image is performed by performing rendering processing including projective transformation, clipping, hidden surface removal, shading, texture mapping, and the like. In particular, since the two-dimensional image generation unit 130 generates a two-dimensional image at any time according to a change in information from the magnetic sensor 120, a real-time rendering process is performed. The image display means 140 is for displaying the two-dimensional image generated by the two-dimensional image generation means 130, and is realized by a liquid crystal display device or the like. The parameter input instructing unit 150 has a function of instructing to input the position and tilt information acquired by the magnetic sensor 120 as display parameters. The display parameter storage unit 160 has a function of storing the set display parameters.

  The display parameter input device 100 has the same form and size as an actual camera, and is equipped with a shutter button and a zoom lever. The display parameter input device 100 is equipped with a CPU and a memory, and each of the above means is realized by the CPU executing a dedicated program.

(2. Processing operation)
Next, the processing operation of the apparatus shown in FIG. 1 will be described. When the apparatus is activated, the magnetic sensor 120 acquires information on its position and tilt. The two-dimensional image generation unit 130 extracts three-dimensional CG data from the three-dimensional CG model storage unit 110. Subsequently, the two-dimensional image generation unit 130 generates a projection image of the three-dimensional CG data with the position of the magnetic sensor 120 as the viewpoint from the relationship between the position and inclination acquired from the magnetic sensor 120 and the extracted three-dimensional CG data. To do. Since such a technique for generating a two-dimensional projection image viewed from the viewpoint position and the line-of-sight direction from three-dimensional CG data is well known, detailed description thereof is omitted here. The two-dimensional image generated by the two-dimensional image generation unit 130 is displayed by the image display unit 140.

  The magnetic sensor 120 acquires information on its own position and inclination at any given time, and the two-dimensional image generation unit 130 generates a two-dimensional image every time the position and inclination are acquired from the magnetic sensor 120. The generated two-dimensional image is displayed on the image display unit 140. Therefore, from the viewpoint of the user, when the display parameter input device 100 is moved, the two-dimensional image appears to change according to the movement. For example, when the three-dimensional CG model of the automobile is set at a certain position corresponding to the real space, the automobile viewed from different angles is displayed on the display unit 140 according to the movement of the display parameter input device 100. Will be.

  As described above, the parameter input instruction unit 150 is driven while a two-dimensional image corresponding to the position is generated and displayed on the screen at any time. Actually, the parameter input instructing means 150 is driven by pressing a shutter-type button provided in the housing of the display parameter input device 100. When the shutter-type button is pressed, the parameter input instruction unit 150 gives a parameter input instruction to the magnetic sensor 120. When receiving an instruction from the parameter input instruction unit 150, the magnetic sensor 120 stores the latest position and inclination acquired at that time in the display parameter storage unit 160. That is, every time an instruction is given from the parameter input instruction unit 150, the position and inclination at that time are stored in the display parameter storage unit 160.

  Therefore, the user checks the state of the two-dimensional image displayed on the display unit 140 while moving the display parameter input device 100 as when shooting the subject with a real camera, and has a favorite angle. The parameter input instruction unit 150 can be driven by pressing a shutter-type button at the moment, and the position and inclination at that moment can be stored in the display parameter storage unit 160.

  As described above, the position and tilt information at the moment when the user presses the shutter-type button is accumulated in the display parameter storage unit 160. The accumulated position and inclination are used for image selection work. Specifically, the stored position and inclination information is input to a computer having the functions of the three-dimensional CG model storage unit 110, the two-dimensional image generation unit 130, and the image display unit 140, and each position and inclination information is input. An optimal image is selected while displaying a two-dimensional image corresponding to. In this way, by using this apparatus, even when a two-dimensional image is generated from a three-dimensional CG model, it is possible to perform the work with exactly the same feeling as when photographing with a real camera. It becomes.

  In the above example, the display parameter input device 100 having the same configuration as the camera functions alone, but the storage means may be separated as shown in FIG. In the example of FIG. 2, the display parameter input device includes a processing server 200 and a portable device 300. In FIG. 2, components having the same functions as those of the apparatus of FIG. In the example of FIG. 2, a communication device 180 is mounted on the portable device 300 having the same shape as the display parameter input device 100 shown in FIG. 1 instead of the three-dimensional CG model storage unit 110 and the display parameter storage unit 160. The processing server 200 is equipped with a three-dimensional CG model storage unit 110 and a display parameter storage unit 160 so as to communicate with each other. That is, when displaying an image, the portable device 300 receives a 3D CG model from the 3D CG model storage unit 110 via the communication unit 170 and the communication unit 180, and uses this to generate a 2D image. Means 130 generates a two-dimensional image. On the other hand, when the shutter button is pressed, information on the position and tilt at that moment is transmitted to the processing server 200 via the communication unit 180 and the communication unit 170 and stored in the display parameter storage unit 160.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, in the above embodiment, only the position and tilt information acquired by the magnetic sensor is stored in the display parameter storage unit 160 as a display parameter. However, the viewing angle may be further stored. In this case, a zoom lever is set on the housing of the display parameter input device 100, and the viewing angle is set to change according to the operation of the zoom lever. The two-dimensional image generation unit 130 obtains the positional relationship between the position and inclination acquired from the magnetic sensor 120 and the three-dimensional CG data, and then generates a projection image using the acquired viewing angle, and the image display unit 140. When the shutter-type button is pressed, in addition to the latest position and inclination acquired at that time, the set viewing angle is stored in the display parameter storage unit 160. Furthermore, camera parameters such as aperture, focus, and shutter speed may be added as part of the display parameters.

It is a block diagram of the display parameter input device which concerns on this invention. It is a block diagram in the modification of the display parameter input device which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Display parameter input apparatus 110 ... Three-dimensional CG model storage means 120 ... Magnetic sensor 130 ... Two-dimensional image generation means 140 ... Image display means 150 ... Parameter input instruction means 160- ..Display parameter storage means 170 ... Communication means 180 ... Communication means 200 ... Processing server 300 ... Portable device

Claims (3)

A device for inputting display parameters of a CG model,
Three-dimensional CG model storage means for storing a three-dimensional CG model in association with a predetermined position in the real space;
A sensor that identifies the current position and tilt;
Based on the relationship between the position of the three-dimensional CG model stored in the three-dimensional CG model storage means and the current position and inclination specified by the sensor, the three-dimensional CG model is projected in the current position and line-of-sight direction 2 Two-dimensional image generation means for generating a two-dimensional image;
Image display means for displaying the generated two-dimensional image;
Parameter input instruction means for instructing to input the position and inclination information as display parameters;
Display parameter storage means for storing the set display parameters;
A display parameter input device.   The display parameter input device according to claim 1, wherein the sensor is a magnetic sensor that identifies a current position and inclination by detecting magnetism emitted from the magnetic transmitter. The display parameter input device includes a processing server and a portable device that can communicate with each other,
The processing server includes the three-dimensional CG model storage unit and the display parameter storage unit,
The display parameter input device according to claim 1, wherein the portable device includes the sensor, the two-dimensional image generation unit, the image display unit, and the parameter input instruction unit. .

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