| 摘要 |
PURPOSE:To speed up measuring processing by including a distance filter processing stage in which the mapping point of a segment located in a desired distance range from a photographing means is left, and the mapping point of the segment located in far distance and close distance out of this desired distance range is removed in a mapping point selection stage. CONSTITUTION:The distance filter processing stage S4 in which the mapping point of the segment located in the desired distance range from the photographing means is left, and the mapping point of the segment located in the far distance and the close distance out of this desired distance range is removed is included in the mapping point selection stage S2. Namely, in the stage S2 to select the mapping point, the mapping point of the segment located in the desired distance range from the photographing means is left, and the mapping point of the segment located in the far distance and the close distance out of this desired distance range is removed. Accordingly, unnecessary mapping point data is discarded, and only the mapping point truely necessary for measurement is left, and three-dimensional measurement can be executed on the basis of this mapping point data. Thus, measuring calculation speed can be accelerated, and simultaneously, the occurrence of mismeasurement can be prevented. |
