发明名称 |
Navigation system for handheld scanner |
摘要 |
A method and apparatus are provided for efficiently obtaining navigational position of a sensor array based on a correlation between images captured by the sensor array at successive points in time. This is achieved by first acquiring a reference frame through said sensor array, successively acquiring a sample frame through said sensor array. Correlation data representing a relationship between the sample frame and the reference frame is then generated and a displacement of a reference feature contained in both the reference frame and the sample frame is determined based on the correlation data. The correlation surface of the correlation data is modeled as a general two-dimensional Taylor series expansion. The method and apparatus of the present invention can be advantageously employed in a scanning device to provide efficient scheme for obtaining navigational information based on a comparison of image frames captured by a sensor array of the scanning device at successive points in time.
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申请公布号 |
US6195475(B1) |
申请公布日期 |
2001.02.27 |
申请号 |
US19980153639 |
申请日期 |
1998.09.15 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
BEAUSOLEIL, JR. RAYMOND G.;ALLEN ROSS R. |
分类号 |
H04N1/19;G06F17/17;G06T1/00;H04N1/047;H04N1/107;(IPC1-7):G06K9/20 |
主分类号 |
H04N1/19 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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