File:Cross ratio metrology example.svg
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Summary
| Description |
English: Use of cross ratios to measure real-world dimensions of features shown in a rectilinear image (pinhole camera model) by CMG Lee. In (1), the width of the side street, W is computed from the known widths of the adjacent shops. In (2), the width of only one shop is needed as a vanishing point, V is visible. A, B, C, D and V are points on the image, their separation given in pixels; A', B', C' and D' are points in the real world, their separation given in metres. |
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| Source |
Own work,
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| Author | Cmglee |
Licensing
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 23:53, 23 February 2018 | | 512 × 341 (179 KB) | Cmglee | Fix numbering and mnemonic. |
| 23:25, 23 February 2018 |  | 512 × 341 (179 KB) | Cmglee | {{Information |description ={{en|1=Use of cross ratios to measure real-world dimensions of features shown in a rectilinear image (pinhole camera model) by CMG Lee. In (1), the width of the side street, W is computed from the known widths of the adjacent shops. In (2), the width of only one shop is needed as a vanishing point, V is visible. A, B, C, D and V are points on the image, their separation given in pixels; A', B', C' and D' are points in the real world, their separation given in metres.}} |source ={{own}} |author =User:Cmglee |date = }} Category:Homography |
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