Calibration jig

A method of arranging a calibration jig comprising a calibration triangle, a center rope, a first tether rope, and a second tether rope, wherein the calibration jig is used for calibration of an image capturing device mounted on a machine, the method comprising:

• placing the calibration triangle on a ground plane in a field of view of the image capturing device, wherein the calibration triangle includes:
• a first rope:
• a second rope connected to the first rope at a first connection point, wherein the first rope and the second rope are equal in length;
• and
• a third rope connected to the first rope and the second rope at a second connection point and a third connection point respectively,
• wherein the first rope, the second rope, and the third rope, when taut, define the calibration triangle with the first connection point, the second connection point, and the third connection point as vertices of the calibration triangle, and
• wherein the third rope comprises two segments of equal length joined together by a ring that allows the center rope to pass through the ring;
• connecting the first connection point with a first anchor point associated with the machine using the center rope;
• connecting the second connection point of the calibration triangle with a second anchor point associated with the machine using the first tether rope;
• connecting the third connection point of the calibration triangle with a third anchor point associated with the machine using the second tether rope, wherein the first tether rope and the second tether rope are equal in length;
• pulling the first connection point outward of the calibration triangle;
• and
• adjusting the center rope to align the calibration triangle for calibration of the image capturing device.

A calibration system comprising:

• a machine;
• an image capturing device mounted on the machine, the image capturing device configured to capture an image of an environment of the machine;
• and
• a calibration jig for calibrating the image capturing device, the calibration jig comprising:
• a calibration triangle including:
• a first rope;
• a second rope connected to the first rope at a first connection point, wherein the first rope and the second rope are equal in length;
• and
• a third rope connected to the first rope and the second rope at a second connection point and a third connection point respectively,
• wherein the first rope, the second rope, and the third rope, when taut, define the calibration triangle with the first connection point, the second connection point, and the third connection point as vertices of the calibration triangle, and
• wherein the first connection point is pulled outward of the calibration triangle in a ground plane in a direction orthogonal to the third rope;
• a center rope configured to connect the first connection point with a first anchor point associated, with the machine;
• a first tether rope configured to connect the second connection point of the calibration triangle with a second anchor point associated with the machine;
• and
• a second tether rope configured to connect the third connection point of the calibration triangle with a third anchor point associated with the machine, wherein the first tether rope and the second tether rope are equal in length.