Patent ID: 11920913
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 5:
6. A conversion parameter calculation device that calculates a conversion parameter for measuring, using images, an actual displacement amount that is an actual value of a displacement indicating movement of an object, the conversion parameter calculation device comprising:
a first obtainer that obtains, from an image capturing device, first image data obtained by the image capturing device capturing an image of the object, the object having a marker attached thereto, the marker being a marker with which specific coordinates are detectable;
a second obtainer that obtains displacement direction information indicating a direction of a displacement of the object, the direction crossing an image capturing surface of the image capturing device;
a position detector that detects the specific coordinates, based on the marker included in the first image data;
a position estimator that estimates a position of the image capturing device, based on a result of detecting the specific coordinates and a parameter of the image capturing device;
a distance calculator that calculates distance data indicating a distance from the image capturing device to the object, based on the specific coordinates and the position of the image capturing device; and
a parameter calculator that calculates the conversion parameter, using the distance data and the displacement direction information, the conversion parameter being a parameter for converting, into the actual displacement amount, a pixel displacement amount at a measurement point on the object based on at least two second image data items captured by the image capturing device at different times.