Display system for excavation machine, excavation machine, and display method for excavation machine

A display system for an excavation machine, comprising:

• a calculator configured to calculate, based on vehicle state data indicating a position and a posture of a vehicle body of an excavation machine, working equipment outer shape data indicating an outer shape and a dimension of working equipment supported by the vehicle body, and working equipment state data indicating a posture of the working equipment, a reference vector extending in a widthwise direction of a bucket of the working equipment and passing through a blade edge of the bucket;
• a processor and a memory, including computer program code, wherein the computer program code, when executed by operation of the, causes an operation to be performed comprising:
• defining with a target excavation landform data acquisition unit, an operation plane passing through the blade edge of the bucket and orthogonal to a rotation axis of the bucket, the operation plane being a plane in which the blade edge of the bucket is moved by actuation of the working equipment toward a target plane of a target excavation landform indicating a target shape of an excavation object to be excavated by the bucket;
• defining with the target excavation landform data acquisition unit, a point on the target plane, whose vertical distance from the bucket through the operation plane is shortest identifying a target line;
• and
• a display controller configured to cause a display device to display the bucket and a target line on the target plane viewed from a direction orthogonal to the reference vector;
• wherein an image in a bucket front view is generated based on the reference vector and the target plane indicating the target line of the target shape of the excavation object and displayed on the display device.