Line segment detection apparatus, and storage medium storing control program

摘要

A line segment detection apparatus includes a head that supports a sensor configured to detect light reflected by a surface of a cutting target medium, a driving unit configured to move the head in two-dimensional directions relatively to the medium, and a processing unit configured to drive the driving unit and perform arithmetic processing on an output of the sensor. The processing unit includes a region detection unit configured to detect a region different in reflectance from surroundings based on a change of a signal output from the sensor when the sensor was moved in a first direction, and a determination unit configured to determine whether the region is a line segment, based on the change of the signal output from the sensor when the sensor passed a point in the region and was moved in a second direction perpendicular to the first direction.

主权项

1. A line segment detection apparatus comprising:
a head that supports a sensor configured to detect light reflected by a surface of a cutting target medium and output a signal corresponding to an amount of the detected light; a driving unit configured to move said head in two-dimensional directions relatively to the cutting target medium; and a processing unit configured to drive said driving unit and perform arithmetic processing on an output of the sensor, said processing unit including:
a region detection unit configured to detect a region different in reflectance from surroundings based on a change of a signal output from the sensor when the sensor was moved together with said head in a first direction parallel to the cutting target medium; anda determination unit configured to, when said region detection unit detects the region, set a first scan section and a second scan section extending from a point in the region respectively to the positive direction and the negative direction of a second direction which is parallel to the cutting target medium and perpendicular to the first direction, and to determine that the region is a line segment in the event that a value corresponding to the color of the line segment is continuously obtained in at least one of the first scan section and second scan section, based on the signal output from the sensor when the sensor scanned the first scan section and the second scan section while passing the point and moving in the second direction.