Patent ID: 9747681
Date: 2017-08-29
CPC Classifications: B41F,B41P,G01J,G06K,G06T,H04N

Claim:
1. A measurement apparatus comprising: a table capable of placing thereon a medium displaying a reference-image including a displayed reference origin or a measurement-image including a displayed measurement origin corresponding to the reference origin; a measurement instrument for measuring an arbitrary measurement point in the medium placed on the table; a movement mechanism for movably supporting the measurement instrument relative to the table; a position detection means for detecting a position of the measurement instrument in a coordinate system of the table; an input means for inputting the measurement origin; a computation means for calculating a position of a measurement point of the measurement-image in the coordinate system of the table based on the positions of the reference origin and a measurement point of the reference-image, and the measurement origin of the measurement-image input by the input means; and a control means for comparing the calculated position of the measurement point of the measurement-image with the position of the measurement instrument detected by the position detection means, and controlling the measurement instrument to be positioned at the calculated measurement point of the measurement image; wherein the computation means comprises: a reference coordinate calculation means for calculating a reference coordinate value indicating a coordinate value of the measurement point in a coordinate system of the reference-image based on reference image structure information configuring the reference-image; and a measurement coordinate calculation means for comparing the reference origin and the measurement origin to calculate coordinate correction information of a coordinate system of the measurement-image relative to the coordinate system of the reference-image based on measurement image structure information configuring the measurement-image, and for correcting the position of the measurement origin based on the coordinate correction information to correct the reference coordinate value and calculating a measurement coordinate value indicating a coordinate value of the measurement point in the coordinate system of the measurement-image corresponding to the measurement point of the reference-image, and wherein the control means