发明名称 |
Distance measuring device and three-dimensional image measuring apparatus |
摘要 |
A distance measuring device includes first and second cameras, first and second Fourier pattern data generating sections, a pattern processing section, and a distance measuring section. The two cameras are spaced apart from each other by a predetermined distance. The first Fourier pattern data generating section generates first two-dimensional Fourier pattern data by performing two-dimensional discrete Fourier transform for image data picked up by the first camera as first pattern data. The second Fourier pattern data generating section generates second Fourier two-dimensional pattern data by performing two-dimensional discrete Fourier transform for image data picked up by the second camera as second pattern data. The pattern processing section synthesizes the first and second Fourier two-dimensional pattern data, and performs either two-dimensional discrete Fourier transform or two-dimensional discrete inverse Fourier transform for the synthesized data. The distance measuring section obtains a correlation peak in a range excluding a portion near a reference position in a correlation component area appearing in the synthesized Fourier two-dimensional pattern data, and measures the distance to a target on the basis of the distance from a reference position in the correlation component area to the position of the correlation peak. <IMAGE> |
申请公布号 |
EP0840254(A3) |
申请公布日期 |
1999.08.25 |
申请号 |
EP19970118965 |
申请日期 |
1997.10.30 |
申请人 |
YAMATAKE-HONEYWELL CO. LTD. |
发明人 |
NAKAJIMA, HIROSHI;KOBAYASHI, KOJI |
分类号 |
G01B11/02;G01S11/12;G06T7/00 |
主分类号 |
G01B11/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|