Image perspective control for video game images

A method of displaying a video image comprising:

• transforming coordinates of an attentional subject in a three-dimensional coordinate system into coordinates thereof in a plane field-of-view coordinate system;
• holding transformed coordinates of the attentional subject before and after the attentional subject moves;
• displaying the attentional subject according to the transformed coordinates, together with a predetermined image, in the video image;
• deciding whether the attentional subject has moved out of said attentional area in the video image;
• calculating a direction in which the attentional subject has moved based on the coordinates which are held if the attentional subject has moved out of said attentional area;
• and
• moving the perspective of the video image and the attentional area so that the attentional subject will be located in a rear position opposite to the calculated direction,
• wherein a perspective of the image is moved in a direction in which the attentional subject moves for displaying the attentional subject in the attentional area in the video image.

A method of displaying a video image to move a perspective of the image in a direction in which an attentional subject moves for displaying the attentional subject in an attentional area in the video image, comprising the steps of:

• transforming coordinates of the attentional subject in a three-dimensional coordinate system into coordinates thereof in a plane field-of view coordinate system;
• deciding whether the attentional subject has moved out of said attentional area in the video image;
• and
• moving the perspective of the video image in the direction in which the attentional subject moves in the video image, and moving the perspective of the video image and the attentional area, when a reference point of said attentional area has reached a first position in a reference point movement range, in which said reference point is movable, at the time said attentional subject is about to move out of said attentional area, so that said attentional subject will be located in the attentional area that is moved to a second position in the reference point movement range which is in point-symmetry relation to said first position across a center of said reference point movement range.

A method of displaying a video image to move a perspective of the image in a direction in which an attentional subject moves for displaying the attentional subject in an attentional area in the video image, comprising the steps of:

• transforming coordinates of the attentional subject in a three-dimensional coordinate system into coordinates thereof in a plane field-of-view coordinate system;
• deciding whether the attentional subject has moved out of said attentional area in the video image;
• and
• moving said attentional subject into said attentional area which is moved, when a reference point of said attentional area has reached a boundary position of a reference point movement range, in which said reference point is movable, at the time said attentional subject is about to move out of said attentional area, so that said attentional subject will be located in the attentional area that is moved with the reference point thereof located in a first one of divided radial areas of the reference point movement range other than a second one of the divided radial areas that is closest to said attentional subject.

A recording medium which stores a control program for displaying a video image comprising:

• transforming coordinates of the attentional subject in a three-dimensional coordinate system into coordinates thereof in a plane field-of-view coordinate system;
• holding transformed coordinates of the attentional subject before and after the attentional subject moves;
• displaying the attentional subject according to the transformed coordinates, together with a predetermined image, in the video image;
• deciding whether the attentional subject has moved out of said attentional area in the video image;
• calculating a direction in which the attentional subject has moved based on the coordinates which are held if the attentional subject has moved out of said attentional area;
• and
• moving the perspective of the video image and the attentional area so that the attentional subject will be located in a rear position opposite to the calculated direction,
• wherein a perspective of the image is moved in a direction in which the attentional subject moves for displaying the attentional subject in the attentional area in the video image.

A recording medium which stores a control program for displaying a video image to move a perspective of the image in a direction in which an attentional subject moves for displaying the attentional subject in an attentional area in the video image, said control program comprising the steps of:

• transforming coordinates of the attentional subject in a three-dimensional coordinate system into coordinates thereof in a plane field-of-view coordinate system;
• deciding whether the attentional subject has moved out of said attentional area in the video image;
• and
• moving the perspective of the video image in the direction in which the attentional subject moves in the video image, and moving the perspective of the video image and the attentional area, when a reference point of said attentional area has reached a first position in a reference point movement range, in which said reference point is movable, at the time said attentional subject is about to move out of said attentional area, so that said attentional subject will be located in the attentional area that is moved to a second position in the reference point movement range which is in point-symmetry relation to said first position across a center of said reference point movement range.

A recoding medium which stores a control program for displaying a video image to move a perspective of the image in a direction in which an attentional subject moves for displaying the attentional subject in an attentional area in the video image, said control program comprising the steps of:

• transforming coordinates of the attentional subject in a three-dimensional coordinates system into coordinates there of in a plane field-of-view coordinate system;
• deciding whether the attentional subject has moved out of said attentional area in the video image;
• and
• moving said attentional subject into said attentional area which is moved, when reference point of said attentional area has reached a boundary position of a reference point movement range, in which said reference point is movable, at the time said attentional subject is about to move out of said attentional area, so that said attentional subject will be located in the attentional area that is moved with the reference point there-of located in a first one divided radial areas of the reference point movement range other than a second one of the divided radial areas that is closet to said attentional subject.

An apparatus, comprising:

• an image display device for displaying an attentional subject in an attentional area in the video image;
• and
• a control device for moving the perspective of the video image in the direction in which the attentional subject moves in the video image, and moving the perspective of the video image and the attentional area so that said attentional subject will be located in a rear position opposite to said direction in which the attentional subject moves, when said attentional subject is about to move out of said attentional area, wherein said control device includes:
• coordinate transforming means for transforming coordinates of the attentional subject in a three-dimensional coordinate system into coordinates thereof in a plane field-of-view coordinate system;
• coordinate holding means for holding coordinates of the attentional subject transformed by said coordinate transforming means before and after the attentional subject moves;
• image display control means for displaying the attentional subject according to the coordinates transformed by said coordinate transforming means, together with a predetermined image, in the video image;
• decision means for deciding whether the attentional subject has moved out of said attentional area in the video image;
• calculating means for calculating a direction in which the attentional subject has moved based on the coordinates held by said coordinate holding means if the attentional subject has moved out of said attentional area;
• and
• image perspective moving means for controlling said image display control means to move the perspective of the video image and the attentional area so that the attentional subject will be located in the rear position opposite to the direction calculated by said calculating means.

A method of displaying a video image, comprising:

• transforming coordinates of an attentional subject in a three-dimensional coordinate system into coordinates thereof in a plane field-of-view coordinate system;
• holding transformed coordinates of the attentional subject before and after the attentional subject moves;
• displaying the attentional subject according to the transformed coordinates, together with a predetermined image, in the video image;
• deciding whether the attentional subject has moved out of said attentional area in the video image;
• calculating a direction in which the attentional subject has moved based on the coordinates which are held, if the attentional subject has moved out of said attentional area;
• and
• moving the perspective of the video image and the attentional area so that the attentional subject will be located in a rear position opposite to the calculated direction,
• wherein a perspective of the image is moved in a direction in which the attentional subject moves when the attentional subject is about to move out of the attentional area.

A recording medium which stores a control program for displaying a video image, comprising:

• transforming coordinates of an attentional subject in a three-dimensional coordinate system into coordinates thereof in a plane field-of-view coordinate system;
• holding transformed coordinates of the attentional subject before and after the attentional subject moves;
• displaying the attentional subject according to the transformed coordinates, together with a predetermined image, in the video image;
• deciding whether the attentional subject has moved out of said attentional area in the video image;
• calculating a direction in which the attentional subject has moved based on the coordinates which are held, if the attentional subject has moved out of said attentional area;
• and
• moving the perspective of the video image and the attentional area so that the attentional subject will be located in a rear position opposite to the calculated direction,
• wherein a perspective of the image is moved in a direction in which the attentional subject moves when the attentional subject is about to move out of the attentional area.