Three-dimensional image data generation system, three-dimensional image data generation method, and computer-readable recording medium

Patent metadata

Field	Value
Publication number	US-10406732-B2
Application number	US-201815891772-A
Country	US
Kind code	B2
Filing date	Feb 8, 2018
Priority date	Mar 9, 2017
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

A three-dimensional image data generation system includes: an editing unit configured to edit grayscale image data in which a density level for specifying an foaming height of a thermally expandable sheet is set for each coordinate in a planar direction; and a conversion unit configured to, when the editing unit changes a size in the planar direction of an image region included in the grayscale image data, convert the density level in correspondence with a ratio of the image region between before and after the change.

First claim

What is claimed is:

1. A three-dimensional image data generation system comprising:
a hardware processor which, under control of a stored program, executes processes comprising:
an editing process of editing grayscale image data in which a density level for specifying a foaming height of a thermally expandable sheet is set for each coordinate in a planar direction; and
a conversion process of, when the editing process changes a size in the planar direction of an image region included in the grayscale image data, converting the density level in correspondence with a ratio of the image region between before and after the change,

wherein in a case where a density level in the grayscale image data after the conversion is expected to be not in a density level range in which a three-dimensional image is formable, the conversion process corrects and converts the density level so that the whole grayscale image data is in the density level range in which a three-dimensional image is formable.

2. The three-dimensional image data generation system according to claim 1 , wherein in a case where the density level in the grayscale image data after the conversion is expected to be distributed only in a part of the density level range in which a three-dimensional image is formable, the conversion process corrects and converts the density level so that the whole grayscale image data is distributed throughout the whole density level range in which a three-dimensional image is formable.

3. The three-dimensional image data generation system according to claim 1 , wherein the conversion process corrects and converts the density level so that a density distribution of the grayscale image data is in a predetermined density level range.

4. The three-dimensional image data generation system according to claim 3 , wherein the conversion process linearly corrects and converts the density level so that an upper limit and a lower limit of the density level range in which a three-dimensional image is formable are respectively an upper limit and a lower limit of the predetermined density level range.

5. The three-dimensional image data generation system according to claim 3 , wherein the conversion process corrects and converts the density level so that a density level change at a predetermined position in a density level range is more noticeable.

6. The three-dimensional image data generation system according to claim 1 , wherein the conversion process sets data exceeding a density level 0 as a conversion target and excludes data of the density level 0 from the conversion target, from among density levels in the grayscale image data.

7. A three-dimensional image data generation method comprising:
editing grayscale image data in which a density level for specifying a foaming height of a thermally expandable sheet is set for each coordinate in a planar direction; and
when the editing changes a size in the planar direction of an image region included in the grayscale image data, converting the density level in correspondence with a ratio of the image region between before and after the change,
wherein in a case where a density level in the grayscale image data after the conversion is expected to be not in a density level range in which a three-dimensional image is formable, the converting corrects and converts the density level so that the whole grayscale image data is in the density level range in which a three-dimensional image is formable.

8. The three-dimensional image data generation method according to claim 7 , wherein in a case where the density level in the grayscale image data after the conversion is expected to be distributed only in a part of the density level range in which a three-dimensional image is formable, the converting corrects and converts the density level so that the whole grayscale image data is distributed throughout the whole density level range in which a three-dimensional image is formable.

9. The three-dimensional image data generation method according to claim 7 , wherein the converting corrects and converts the density level so that a density distribution of the grayscale image data is in a predetermined density level range.

10. The three-dimensional image data generation method according to claim 9 , wherein the converting linearly corrects and converts the density level so that an upper limit and a lower limit of the density level range in which a three-dimensional image is formable are respectively an upper limit and a lower limit of the predetermined density level range.

11. The three-dimensional image data generation method according to claim 7 , wherein the converting sets data exceeding a density level 0 as a conversion target and excludes data of the density level 0 from the conversion target, from among density levels in the grayscale image data.

12. A non-transitory computer-readable recording medium having stored thereon a program executable by a computer of a three-dimensional image data generation system, the program causing the computer to perform a procedure comprising:
an editing process of editing grayscale image data in which a density level for specifying a foaming height of a thermally expandable sheet is set for each coordinate in a planar direction; and
a conversion process of, when a size in the planar direction of an image region included in the grayscale image data is changed, converting the density level in correspondence with a ratio of the image region between before and after the change,
wherein in a case where a density level in the grayscale image data after the conversion is expected to be not in a density level range in which a three-dimensional image is formable, the conversion process corrects and converts the density level so that the whole grayscale image data is in the density level range in which a three-dimensional image is formable.

13. The non-transitory computer-readable recording medium according to claim 12 , wherein in a case where the density level in the grayscale image data after the conversion is expected to be distributed only in a part of the density level range in which a three-dimensional image is formable, the conversion process corrects and converts the density level so that the whole grayscale image data is distributed throughout the whole density level range in which a three-dimensional image is formable.

14. The non-transitory computer-readable recording medium according to claim 12 , wherein the conversion process corrects and converts the density level so that a density distribution of the grayscale image data is in a predetermined density level range.

15. The non-transitory computer-readable recording medium according to claim 14 , wherein the conversion process linearly corrects and converts the density level so that an upper limit and a lower limit of the density level range in which a three-dimensional image is formable are respectively an upper limit and a lower limit of the predetermined density level range.

16. The non-transitory computer-readable recording medium according to claim 14 , wherein the conversion process corrects and converts the density level so that a density level change at a predetermined position in a density level range is more noticeable.

17. The non-transitory computer-readable recording medium according to claim 12 , wherein the conversion process sets data exceeding a density level 0 as a conversion target and excludes data of the density level 0 from the conversion target, from among density levels in the grayscale image data.

Assignees

• Casio Computer Co Ltd

Inventors

• Kimura Satoshi

Classifications

• H04N1/4074

  using histograms · CPC title

• B29K2105/0047

  Agents changing thermal characteristics · CPC title

• B29C44/3484

  Stopping the foaming reaction until the material is heated or re-heated · CPC title

• B29C44/022

  Foaming unrestricted by cavity walls, e.g. without using moulds or using only internal cores · CPC title

• B29C44/3415

  Heating or cooling · CPC title