公开(公告)号：US20180367681A1

公开(公告)日：2018-12-20

申请号：US15627813

申请日：2017-06-20

Applicant: OmniVision Technologies, Inc.

Inventor： Shan Xu ,  Xinting Gao ,  Bin Chen ,  Ye Tao ,  Guansong Liu ,  Lu Chang

IPC: H04N1/00 ,  G06T7/80

Abstract: A chart for calibrating a system of multiple cameras, the chart comprising: a background; an array of dots contrasting the background, wherein the array of dots are arranged in rows and columns, wherein the array of dots comprise a first dot array, and a second dot array, wherein the first dot array fully occupies a first region of evenly spaced dots with a first dot density, the second dot array fully occupies a second region of evenly spaced dots with a second dot density, and wherein the second region is enclosed within the first region; a group of first markers in the first region, a group of second markers in the second region, and a third marker at the center of the chart, wherein each second marker is closer to the third marker than each first marker.

公开(公告)号：US11082566B2

公开(公告)日：2021-08-03

申请号：US15627813

申请日：2017-06-20

Applicant: OmniVision Technologies, Inc.

Inventor： Shan Xu ,  Xinting Gao ,  Bin Chen ,  Ye Tao ,  Guansong Liu ,  Lu Chang

IPC: H04N1/00 ,  G06T7/80

Abstract: A chart for calibrating a system of multiple cameras, the chart comprising: a background; an array of dots contrasting the background, wherein the array of dots are arranged in rows and columns, wherein the array of dots comprise a first dot array, and a second dot array, wherein the first dot array fully occupies a first region of evenly spaced dots with a first dot density, the second dot array fully occupies a second region of evenly spaced dots with a second dot density, and wherein the second region is enclosed within the first region; a group of first markers in the first region, a group of second markers in the second region, and a third marker at the center of the chart, wherein each second marker is closer to the third marker than each first marker.