Patent ID: 11881001
Assignee: SONY INTERACTIVE ENTERTAINMENT LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 9:
10. A calibration method comprising:
by a calibration apparatus for calibrating an imaging apparatus including a plurality of cameras with different optical axis orientations,
acquiring data of images of a chart captured from different directions by at least two cameras among the plurality of cameras, the chart including a plurality of planes forming a predetermined angle;
detecting, from each of the images, images of feature points of a pattern depicted on the chart and generating feature point information in which position coordinates of the images of the feature points are associated with position coordinates of the feature points on the chart; and
acquiring a parameter including position and posture information between the cameras on a basis of the feature point information; wherein
any one plane among the plurality of planes includes
an area whose depicted pattern has been subjected to a projective transformation such that positions of the feature points uniformly appear in a field-of-view in at least one of vertical and horizontal directions despite being at different distances in real space, and
an area whose depicted pattern is not subjected to the projective transformation.