# US 2018/0322372 A1 · Book electronization method and book electronization device

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- Number: US 2018/0322372 A1
- Document ID: US20180322372A1
- Status: Published application
- Kind: A1
- Application number: 16/069,301
- Filed: 2017-01-27
- Published: 2018-11-08
- Earliest claimed: 2016-01-28
- Assignees: Sharp Kabushiki Kaisha; Kyoto University
- Applicants: Sharp Kabushiki Kaisha; Kyoto University
- Inventors: TOHRU NAKANISHI; KOJI KOYAMADA; NAOHISA SAKAMOTO
- Web page: https://patentgrep.com/patent/US20180322372A1

## CPC

- G06F 3/0483: Interaction with page-structured environments, e.g. book metaphor
- G06T 7/40: Analysis of texture (depth or shape recovery from texture G06T7/529)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

Information of a character string or the like described on a page of a book is obtained from three-dimensional data of the book. A book electronization device (1) includes a surface specification unit (12) that specifies a page region corresponding to a page of a book in three-dimensional data of the book, which has data values corresponding to a sheet of the book and a gap between sheets, and a data generation unit (13) that maps a character string or graphic in the page region to a two-dimensional plane and generates two-dimensional page data including a character string or graphic written or drawn in the book.

## Claims

### Claim 1

A book electronization method, comprising the steps of:
using three-dimensional data of a book, which has data values corresponding to a sheet of the book and a gap between sheets, and specifying a page region corresponding to a page of the book in the three-dimensional data; and
mapping a character string or graphic in the page region to a two-dimensional plane and generating two-dimensional page data including a character string or graphic written or drawn in the book.

### Claim 2 (depends on 1)

The book electronization method according to claim 1, comprising
the step of designating an initial point corresponding to one point on the page in the three-dimensional data, wherein
at the step of specifying the page region, the page region including the initial point is specified from the three-dimensional data.

### Claim 3 (depends on 2)

The book electronization method according to claim 2, comprising
the step of designating a linear path in the three-dimensional data, wherein
at the step of designating the initial point, a point at which the path crosses the page region is designated as the initial point on a basis of a data value in the path.

### Claim 4 (depends on 1)

The book electronization method according to claim 1, wherein
at the step of specifying the page region, an isosurface corresponding to a threshold that distinguishes a data value of the sheet and a data value of the gap between the sheets is specified.

### Claim 5 (depends on 2)

The book electronization method according to claim 2, comprising
the step of performing a differential operation for the three-dimensional data and generating three-dimensional data subjected to the differential operation, wherein
at the step of designating the initial point, the initial point is designated on a basis of values of the three-dimensional data subjected to the differential operation.

### Claim 6

A book electronization device, comprising:
a region specification unit that uses three-dimensional data of a book, which has data values corresponding to a sheet of the book and a gap between sheets, and specifies a page region corresponding to a page of the book in the three-dimensional data; and
a data generation unit that maps a character string or graphic in the page region to a two-dimensional plane and generates two-dimensional page data including a character string or graphic written or drawn in the book.

### Claim 7 (depends on 6)

A non-transitory computer-readable recording medium having a control program recorded therein, the control program causing a computer to function as the region specification unit and the data generation unit in the book electronization device according to claim 6.