Deformation amount measuring method, program, server device, and system

A non-transitory computer readable medium containing a program for measuring an amount of deformation of a measurement subject in which a sheet is used that comprises a first layer portion having a first pattern that includes a plurality of line drawings extending in a first direction, and a second layer portion overlaid on the first layer portion and having a second pattern that includes a plurality of line drawings extending in a second direction different than the first direction;

• the program configured to cause a computer to execute the steps of:
• acquiring reference data on the basis of pre-deformation image data corresponding to a pre-deformation image including a pre-deformation moire produced as a result of the pre-deformation first pattern and the second pattern being overlaid;
• acquiring, from the sheet that has been disposed on the measurement subject, post-deformation image data corresponding to a post-deformation image including a post-deformation moire produced as a result of the post-deformation first pattern and second pattern being overlaid;
• and
• calculating an amount of deformation of the measurement subject on the basis of the reference data and the post-deformation image data.

A server device, comprising:

• a server receiving unit implemented by the server device executing a program that receives from a sheet that is disposed on a measurement subject and that includes a first layer portion having a first pattern that includes a plurality of line drawings extending in a first direction, and a second layer portion overlaid on the first layer portion and having a second pattern that includes a plurality of line drawings extending in a second direction different than the first direction, pre-deformation image data corresponding to a pre-deformation image including a pre-deformation moire produced as a result of the pre-deformation first pattern and the second pattern being overlaid and post-deformation image data corresponding to a post-deformation image including a post-deformation moire produced as a result of the post-deformation first pattern and second pattern being overlaid;
• a server processing unit implemented by the server device executing a program that calculates an amount of deformation of the measurement subject on the basis of the pre-deformation image data and the post-deformation image data;
• and
• a server sending unit implemented by the server device executing a program that sends the amount of deformation of the measurement subject to a terminal device.

A system comprising a terminal device and a server device capable of communication with each other,

• the terminal device including:
• an image data acquisition unit implemented by the terminal device executing a program that acquires from a sheet that is disposed on a measurement subject and that includes a first layer portion having a first pattern that includes a plurality of line drawings extending in a first direction, and a second layer portion overlaid on the first layer portion and having a second pattern that includes a plurality of line drawings extending in a second direction different than the first direction, pre-deformation image data corresponding to a pre-deformation image including a pre-deformation moire produced as a result of the pre-deformation first pattern and the second pattern being overlaid and post-deformation image data corresponding to a post-deformation image including a post-deformation moire produced as a result of the post-deformation first pattern and second pattern being overlaid;
• a terminal communication unit implemented by the terminal device executing a program that sends the post-deformation image data to the server device and receives an amount of deformation of a deformation following portion from the server device;
• and
• a display unit that displays an amount of deformation of the measurement subject that has been received;
• the server device including:
• a memory that stores the post-deformation image data;
• a server processing unit implemented by the server device executing a program that calculates the amount of deformation of the measurement subject on the basis of the pre-deformation image data and the post-deformation image data;
• and
• a server communication unit implemented by the server device executing a program that receives the post-deformation image data from the terminal device and sends the amount of deformation of the measurement subject to the terminal device.