公开(公告)号：US09454817B2

公开(公告)日：2016-09-27

申请号：US14654249

申请日：2014-02-19

Applicant: Optos PLC

Inventor： David Clifton ,  Ralph Allen Pinnock

IPC: G06K9/00 ,  G06T7/00 ,  G06T5/20 ,  A61B3/00 ,  A61B3/12

CPC classification number: G06T7/003 ,  A61B3/0025 ,  A61B3/1225 ,  G06T5/20 ,  G06T7/136 ,  G06T7/32 ,  G06T7/337 ,  G06T2207/20164 ,  G06T2207/30041 ,  G06T2207/30101

Abstract: An image processing apparatus uses first and second digital vascular image data to register two images. The two images may be from different imaging modes. The first and second images are processed with a two-dimensional, directional filter (500) that has the effect of producing clusters of orthogonally adjacent image data points in which the magnitude of an intensity gradient between each orthogonally adjacent image data point is less than a predetermined value. Subsequently, common clusters are identified between the first and second image data using a corner detecting algorithm (600). The directional filter produces “stepping” features, where vascular features would otherwise appear with smooth edges. These numerous features are identified by the corner detecting algorithm and can be used (1000) for registering common clusters between the first and second image data. The filter may be a rotating Gabor filter matched to vascular features in the images.

Abstract translation: 图像处理装置使用第一和第二数字血管图像数据来登记两个图像。 两个图像可以来自不同的成像模式。 第一和第二图像用二维方向滤波器（500）处理，其具有产生正交相邻图像数据点的聚类的效果，其中每个正交相邻图像数据点之间的强度梯度的幅度小于 预定值。 随后，使用角部检测算法（600）在第一和第二图像数据之间识别公共集群。 方向滤波器产生“步进”特征，其中血管特征将以平滑的边缘出现。 这些许多特征由角部检测算法识别，并且可以使用（1000）来注册第一和第二图像数据之间的公共簇。 滤波器可以是与图像中的血管特征匹配的旋转Gabor滤波器。