公开(公告)号：US09235876B2

公开(公告)日：2016-01-12

申请号：US14029716

申请日：2013-09-17

Applicant: FLIR Systems, Inc.

Inventor： Nicholas Högasten ,  Malin Ingerhed ,  Mark Nussmeier ,  Eric A. Kurth ,  Theodore R. Hoelter ,  Katrin Strandemar ,  Pierre Boulanger ,  Barbara Sharp

IPC: G06K9/40 ,  G06T5/00 ,  G06T5/50 ,  H04N5/33 ,  H04N5/365 ,  H04N5/225

CPC classification number: G06T5/002 ,  G06T5/50 ,  G06T2207/10016 ,  G06T2207/10048 ,  G06T2207/20182 ,  H04N5/2253 ,  H04N5/2254 ,  H04N5/2257 ,  H04N5/33 ,  H04N5/3658

Abstract: Methods and systems are provided to reduce noise in thermal images. In one example, a method includes receiving an image frame comprising a plurality of pixels arranged in a plurality of rows and columns. The pixels comprise thermal image data associated with a scene and noise introduced by an infrared imaging device. The image frame may be processed to determine a plurality of column correction terms, each associated with a corresponding one of the columns and determined based on relative relationships between the pixels of the corresponding column and the pixels of a neighborhood of columns. In another example, the image frame may be processed to determine a plurality of non-uniformity correction terms, each associated with a corresponding one of the pixels and determined based on relative relationships between the corresponding one of the pixels and associated neighborhood pixels within a selected distance.

Abstract translation: 提供了方法和系统来减少热图像中的噪音。 在一个示例中，一种方法包括接收包括以多个行和列排列的多个像素的图像帧。 像素包括与场景相关联的热图像数据和由红外成像装置引入的噪声。 可以处理图像帧以确定多个列校正项，每个列修正项与列中的相应列之一相关联，并且基于相应列的像素和列的邻域的像素之间的相对关系来确定。 在另一示例中，图像帧可以被处理以确定多个不均匀性校正项，每一个都与相应的一个像素相关联，并且基于所选择的像素中的相应一个像素和相关邻域像素之间的相对关系确定 距离。