Storage medium, content providing apparatus, and control method for providing stereoscopic content based on viewing progression

1. A non-transitory computer readable storage medium which stores a program for causing a computer to execute:

processing that detects that viewing is being performed for a book that is provided for reading on which details corresponding to a predetermined story are printed and that is registered in advance;

processing that, for a target book for which it is detected that viewing is being performed, identifies a progression position in the viewing in a story corresponding to the book; and

processing that starts presentation of binocular stereoscopic content associated with the progression position in the viewing that is identified,

wherein

a plurality of progression positions, including the progression position in the story corresponding to the book, for each book is registered in advance,

in the processing that starts the presentation, a range of the story corresponding to the target book that is presented as the binocular stereoscopic content is decided based on the progression position identified in the processing that identifies the progression position among the plurality of progression positions, and the presentation of the binocular stereoscopic content is started,

the program further causes the computer to execute processing that detects a posture of a user viewing the book,

a suited posture of the user is defined for viewing the binocular stereoscopic content, and

in the processing that starts, if the detected posture of the user is different from the suited posture, a presented position of the binocular stereoscopic content is moved so as to guide the posture of the user to the suited posture.

2. The storage medium according to claim 1 , wherein

the program further causes the computer to execute processing that obtains a captured image that captured the book being viewed by the user who is a target of presentation of the binocular stereoscopic content, and

based on the obtained captured image, the processing that detects and the processing that identifies are performed.

3. The storage medium according to claim 2 , wherein

the book registered in advance includes a page on which an image indicating details corresponding to a predetermined story is printed, and

in the processing that identifies, the progression position in the viewing is identified based on an image of the target book in the captured image.

4. The storage medium according to claim 2 , wherein

the book registered in advance includes a comic book comprising a page comprising at least one panel, and

in the processing that identifies, the progression position in the viewing is identified by recognizing a panel of the target book included in the captured image.

5. The storage medium according to claim 1 , wherein

the binocular stereoscopic content that is presented in the processing that starts is changed in accordance with a number of times that the same progression position is identified as the progression position in the viewing.

6. The storage medium according to claim 1 , wherein

the binocular stereoscopic content that is started is content for which progression of presentation details is controlled based on the story corresponding to the target book, and that includes presentation details corresponding to the progression position in the viewing.

7. The storage medium according to claim 6 , wherein

the program further causes the computer to execute processing that changes a reference position of a viewpoint for which rendering is performed for the binocular stereoscopic content for which progression control is performed based on the story corresponding to the target book.

8. The storage medium according to claim 7 , wherein

the program further causes the computer to, in accordance with a direction in which the user who is a target of presentation of the binocular stereoscopic content is observing the content, execute processing that controls a line of sight direction for which the content is rendered,

wherein in the processing that changes, the reference position of the viewpoint is changed based on a rotation of a direction of the observing.

9. The storage medium according to claim 1 , wherein

the binocular stereoscopic content that is started is content including details that are not included in details printed on the target book for the story corresponding to the target book.

10. The storage medium according to claim 1 , wherein

the binocular stereoscopic content that is started is content for providing a “be-the-character” experience of the story corresponding to the target book.

11. The storage medium according to claim 1 , wherein

in the processing that starts, the range of the story is different in accordance with a combination of identified progression positions among the plurality of progression positions.

12. A content providing apparatus having a central processing unit (CPU), wherein

the CPU is configured to:

detect that viewing is being performed for a book that is provided for reading on which details corresponding to a predetermined story are printed and that is registered in advance;

identify, for a target book for which it is detected that viewing is being performed, a progression position in the viewing in a story corresponding to the book;

start presentation of binocular stereoscopic content associated with the identified progression position in the viewing; and

detect a posture of a user viewing the book,

wherein

a plurality of progression positions, including the progression position in the story corresponding to the book, for each book is registered in advance,

a range of the story corresponding to the target book that is presented as the binocular stereoscopic content is decided based on the progression position identified among the plurality of progression positions, and the presentation of the binocular stereoscopic content is started,

a suited posture of the user is defined for viewing the binocular stereoscopic content, and

if the detected posture of the user is different from the suited posture, a presented position of the binocular stereoscopic content is moved so as to guide the posture of the user to the suited posture.

13. A control method of a content providing apparatus, the method comprising:

detecting that viewing is being performed for a book that is provided for reading on which details corresponding to a predetermined story are printed and that is registered in advance;

identifying, for a target book for which it is detected in the detecting that viewing is being performed, a progression position in the viewing in a story corresponding to the book;

starting presentation of binocular stereoscopic content associated with the progression position in the viewing that is identified in the identifying; and

detecting a posture of a user viewing the book,

wherein

a plurality of progression positions, including the progression position in the story corresponding to the book, for each book registered in advance,

in the starting, a range of the story corresponding to the target book that is presented as the binocular stereoscopic content is decided based on the progression position identified in the identifying among the plurality of progression positions, and the presentation of the binocular stereoscopic content is started,

a suited posture of the user is defined for viewing the binocular stereoscopic content, and

if the detected posture of the user is different from the suited posture, a presented position of the binocular stereoscopic content is moved so as to guide the posture of the user to the suited posture.