发明名称 |
VERFAHREN UND VORRICHTUNG ZUM ERMITTELN EINER KONTUR UND EINES MITTELPUNKTES EINES OBJEKTS |
摘要 |
A method for determining a contour of an object in a digital image includes determining a preliminary object center and determining contour candidate image points. The contour candidate image points are determined as image points on a plurality of paths leading away from a preliminary object center by detecting a change from a first section to a second section on a feature space based on the image point value range of the digital image or by detecting the exceeding of a predetermined strength of a feature change in the feature space, wherein the contour candidate image points have a distance to the preliminary or to an improved object center and are ordered according to a polar angle. Further, the method includes determining zones of neighboring contour candidate image points within which a change of the distance of the contour candidate image points lies above a threshold value and an elimination of contour candidate image points which lie between the zones of neighboring contour candidate image points. Finally, a determination of the contour is executed on the basis of the remaining contour candidate image points. |
申请公布号 |
AT529825(T) |
申请公布日期 |
2011.11.15 |
申请号 |
AT20090772085T |
申请日期 |
2009.06.15 |
申请人 |
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. |
发明人 |
ZERFASS, THORSTEN;BERGEN, TOBIAS;STECKHAN, DIRK |
分类号 |
G06K9/46 |
主分类号 |
G06K9/46 |
代理机构 |
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地址 |
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