公开(公告)号：US20210140766A1

公开(公告)日：2021-05-13

申请号：US17086759

申请日：2020-11-02

申请人： Trimble Jena GmbH

发明人： Richard Bellmann ,  Ronny Klinghammer ,  Andreas Frank

IPC分类号： G01C15/06 ,  G06T7/73 ,  G06T7/521 ,  G06T7/60 ,  G06K9/46 ,  G06K9/32 ,  G06T7/246 ,  H04N5/225

摘要： The invention relates to optical surveying such as in building construction, road construction, landscaping and similar. A first image sensor obtains in a first wavelength range a first image of a scene within a field of view captured by an optical arrangement such as a telescope. A light emitter emits light in a second wavelength range and a second image sensor obtains a second image of the field of view in the second wavelength range. A target position of a reflecting target is found in the first image by detecting a known image pattern of the reflecting target in the first image. A region of interest in the second image is then a defined based on the identified target position in the first image, for detecting a reflector position of a reflector of the reflecting target in the region of interest. With the invention it becomes possible to improve the identification of a reflective target at reduced processing time, even if reflections from other objects than the reflective target are present.

公开(公告)号：US11441901B2

公开(公告)日：2022-09-13

申请号：US17086759

申请日：2020-11-02

申请人： Trimble Jena GmbH

发明人： Richard Bellmann ,  Ronny Klinghammer ,  Andreas Frank

IPC分类号： G01C15/06 ,  G06T7/521 ,  G06T7/73 ,  G06T7/246 ,  G06T7/60 ,  H04N5/225 ,  G06V10/60 ,  G06V10/20 ,  G02B23/00

摘要： The invention relates to optical surveying such as in building construction, road construction, landscaping and similar. A first image sensor obtains in a first wavelength range a first image of a scene within a field of view captured by an optical arrangement such as a telescope. A light emitter emits light in a second wavelength range and a second image sensor obtains a second image of the field of view in the second wavelength range. A target position of a reflecting target is found in the first image by detecting a known image pattern of the reflecting target in the first image. A region of interest in the second image is then a defined based on the identified target position in the first image, for detecting a reflector position of a reflector of the reflecting target in the region of interest. With the invention it becomes possible to improve the identification of a reflective target at reduced processing time, even if reflections from other objects than the reflective target are present.