公开(公告)号：US20240428382A1

公开(公告)日：2024-12-26

申请号：US18749910

申请日：2024-06-21

Applicant: Axis AB

Inventor： Thomas Winzell ,  Lidia Gridneva ,  Jimmy Heimdal

IPC: G06T5/70 ,  G06T5/40 ,  G06T7/73

Abstract: A method for thermal image processing, comprises: acquiring a thermal image depicting a scene; obtaining a frequency distribution based on pixel intensities of the thermal image; processing the frequency distribution to determine whether the frequency distribution comprises a peak, caused by a hot object in the scene, which is separated from a thermal background of the scene by more than an intensity threshold; and in response to determining that the frequency distribution comprises the peak, processing the thermal image to suppress a ghost image of the hot object in the thermal image, wherein the ghost image is caused by internal reflections of radiation from the hot object in the thermal camera, and wherein the processing of the thermal image comprises: estimating a location of ghost image pixels forming the ghost image; and suppressing the ghost image in the thermal image by adjusting intensities of the ghost image pixels.