公开(公告)号：US11138689B2

公开(公告)日：2021-10-05

申请号：US16199569

申请日：2018-11-26

Applicant: Quanta Computer Inc.

Inventor： Chun-Chieh Chang ,  Chung-Run Liao

IPC: G06K9/00 ,  G06T3/40 ,  G06T3/00 ,  G06F3/0488

Abstract: The present invention provides a method for non-linearly stretching a cropped image, including: obtaining an FOV difference table of a panoramic lens; calculating a polynomial of an approximated curve represented by the values of the FOV difference table; shooting a circular wide-angle image using the panoramic lens; cropping the circular wide-angle image to preserve the remaining circular wide-angle image under a specific viewing angle; under the specific viewing angle, resampling a plurality of points by the polynomial to obtain the corresponding spacing distance of the points; and while maintaining the ratio of the spacing distance between the plurality of points, stretching the remaining circular wide-angle image to the size of the original circular wide-angle image.