公开(公告)号：US20200327691A1

公开(公告)日：2020-10-15

申请号：US16839083

申请日：2020-04-03

Applicant: Axis AB

Inventor： Hampus LINSE ,  Song YUAN ,  Johan FÖRBERG

IPC: G06T7/73 ,  G06T5/50

Abstract: A method for detecting an object in a first distorted image using a sliding window algorithm, comprising: receiving an inverse of a mathematical representation of a distortion of the first distorted image; wherein the detection of an object comprises sliding a sliding window over the first distorted image, the sliding window comprising a feature detection pattern, and for each position of a plurality of positions in the first distorted image: transforming the sliding window based on the inverse of the mathematical representation of the distortion at the position, wherein the step of transforming the sliding window comprises transforming the feature detection pattern of the sliding window such that a resulting distortion of the feature detection pattern of the transformed sliding window corresponds to the distortion of the first distorted image at the position; and using the transformed sliding window comprising the transformed feature detection pattern in the sliding window algorithm.