Marker, method for manufacturing marker, and detection target
AssigneeDai Nippon Printing Co., Ltd.
InventorsTadashi Furukawa, Koujiro Ookawa, Yukio Taniguchi, Hideaki Fujisaki, Keiji Kashima
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Abstract
A high-precision marker, which is easy to manufacture, has a base material layer, a first layer which is laminated onto one surface of the base material layer, and which is observed in a first color, and a second layer which is partially laminated onto the first layer, is observed in a second color different from the first color, and partially conceals the first layer, wherein the first layer is observable in a region in which the second layer is not laminated, and the second layer is formed by a resist material.
Claims23
A marker for measurement of at least one of a position and an orientation from a camera, comprising:
- a base material layer;
- a first layer that is laminated on an observation side of the base material layer, and is detected in a first color;
- and
- a second layer that is partially laminated on an observation side of the first layer, is detected in a second color different from the first color, and partially conceals the first layer,
- the first layer being detectable in a region where the second layer is not laminated, and
- the second layer including a resist material, wherein:
- a plurality of marks are formed from the first and second layers, are each positioned at a corner region of the marker, and are configured to provide information on a relative orientation of the marker with respect to a camera that captures an image of the marker,
- the marker is configured to be attached to a target,
- when the camera captures an image of the attached marker, the at least one of the position and the orientation from the camera is determined from how the plurality of marks each provided at the corner region of the marker are displayed in the captured image, and
- the determination of the at least one of the position and the orientation allows an automatic control device to recognize the target and perform automatic control.
A plate-shaped marker for measurement of at least one of a position and an orientation from a camera, comprising:
- a base material layer;
- a first layer that is laminated on an observation side of the base material layer, and is laminated on an entire surface of the base material layer and detected in a first color;
- and
- a second layer that is partially laminated on an observation side of the first layer, is detected in a second color different from the first color, and partially conceals the first layer,
- wherein the first layer is detectable in a region where the second layer is not laminated, the second layer including a resist material, and
- the base material layer has a linear expansion coefficient of 10×10−6/° C. or less, wherein:
- a plurality of marks are formed from the first and second layers, are each positioned at a corner region of the plate-shaped marker, and are configured to provide information on a relative orientation of the plate-shaped marker with respect to a camera that captures an image of the plate-shaped marker,
- the plate-shaped marker is configured to be attached to a target,
- when the camera captures an image of the attached plate-shaped marker, the at least one of the position and the orientation from the camera is determined from how the plurality of marks each provided at the corner region of the plate-shaped marker are displayed in the captured image, and
- the determination of the at least one of the position and the orientation allows an automatic control device to recognize the target and perform automatic control.
Dependencies are inferred from the claim text.