Measurement face extraction apparatus and method
First Claim
1. Measurement face extraction apparatus comprising:
- image input means for inputting a left image and a right image of a three-dimensional space that includes a measurement face, the left image including a left image of the measurement face and the right image including a right image of the measurement face;
conversion means for extracting a plurality of pairs of points each consisting of a point from the left image of the measurement face and a corresponding point from the right image of the measurement face, for calculating positions in the three-dimensional space for the pairs of points, for utilizing the calculated positions to determine a projection plane in the three-dimensional space that include the measurement face, and for projecting each pixel position in the left image and the right image onto the projection plane;
memory means having a plurality of storage units, each storage unit corresponding to a portion of the projection plane and being capable of storing information regarding a pixel position from the left image and a pixel position from the right image projected onto the corresponding portion of the projection plane; and
extraction means for extracting from said memory means a group of storage units in which stored information regarding a pixel position from the left image is similar within a predetermined threshold to stored information regarding a pixel position from the right image.
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Abstract
A measurement face extraction apparatus extracts a measurement face such as a road area in three-dimensional space. The measurement face is continuously located in the three-dimensional space. In the apparatus, two cameras input two images each of which includes the measurement face. A conversion unit calculates an equation of a projection plane corresponding to the measurement face and projects each position of each image onto the projection plane. A memory stores image information of each position of the two images by unit of projected position on the projection plane. An extraction unit, extracts each projected position for which the image information of the two images are similar from each projected position of the memory as the measurement face on the projection plane.
66 Citations
15 Claims
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1. Measurement face extraction apparatus comprising:
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image input means for inputting a left image and a right image of a three-dimensional space that includes a measurement face, the left image including a left image of the measurement face and the right image including a right image of the measurement face; conversion means for extracting a plurality of pairs of points each consisting of a point from the left image of the measurement face and a corresponding point from the right image of the measurement face, for calculating positions in the three-dimensional space for the pairs of points, for utilizing the calculated positions to determine a projection plane in the three-dimensional space that include the measurement face, and for projecting each pixel position in the left image and the right image onto the projection plane; memory means having a plurality of storage units, each storage unit corresponding to a portion of the projection plane and being capable of storing information regarding a pixel position from the left image and a pixel position from the right image projected onto the corresponding portion of the projection plane; and extraction means for extracting from said memory means a group of storage units in which stored information regarding a pixel position from the left image is similar within a predetermined threshold to stored information regarding a pixel position from the right image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Measurement face extraction method comprising the steps of:
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inputting a left image and a right image of a three-dimensional space that includes a measurement face, the left image including a left image of the measurement face and the right image including right image of the measurement face; extracting a plurality of pairs of points, each pair consisting of a point from the left image of the measurement face and a corresponding point from the right image of the measurement face; calculating positions in the three-dimensional space for the pairs of points; calculating a projection plane in the three-dimensional space that includes the measurement face utilizing the calculated positions; projecting each pixel position in the left image and the right image onto the projection plane; storing in each of a plurality of storage units information regarding a pixel position in the left image and a pixel position in the right image projected onto the projection plane, wherein each storage unit corresponds to a portion of the projection plane; and extracting a group of storage units in which stored information regarding a pixel position in the left image is similar within a predetermined threshold to stored information regarding a pixel position in the right image.
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15. A computer readable memory containing computer-readable instructions to extract a measurement face comprising:
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instruction means for causing a computer to input a left image and a right image of a three-dimensional space that includes a measurement face, the left image including a left image of the measurement face and the right image including a right image of the measurement face; instruction means for causing a computer to extract a plurality of pairs of points, each pair consisting of a point from the left image of the measurement face and a corresponding point from the right image of the measurement face; instruction means for causing a computer to calculate positions in the three-dimensional space for the pairs of points; instruction means for causing a computer to calculate a projection plane in the three-dimension space that includes the measurement face; instruction means for causing a computer to project each pixel position in the left image and the right image onto the projection plane; instruction means for causing a computer to store in each of a plurality of storage units information regarding a pixel position in the left image and a pixel position in the right image projected onto the projection plane, wherein each storage unit corresponds to an area of the projection plane; and instruction means for causing a computer to extract a group of storage units in which stored information regarding a pixel position in the left image is similar within a predetermined threshold to stored information regarding a pixel position in the right image.
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Specification