{"id":11291,"date":"2020-12-01T10:23:44","date_gmt":"2020-12-01T09:23:44","guid":{"rendered":"http:\/\/www.keris-studio.fr\/blog\/?p=11291"},"modified":"2022-04-13T14:26:29","modified_gmt":"2022-04-13T13:26:29","slug":"photogrammetry-boat-surveys","status":"publish","type":"post","link":"https:\/\/www.keris-studio.fr\/blog\/?p=11291","title":{"rendered":"Photogrammetry\u00a0: boat surveys"},"content":{"rendered":"

Photogrammetric surveying of ships is a complex exercise due to the nature of the objects to be recorded. The advantage of a complete survey, as opposed to a half-hull survey, is that it allows the deformations of the structures to be identified, evaluated and diagnosed.<\/p>\n

In the example below, the demonstration is made on a model. The principles and difficulties are identical to a 1:1 scale model, but with much better accessibility. For examples of real boats, see the following pages<\/p>\n

https:\/\/www.keris-studio.fr\/blog\/?p=11270<\/a>. Et https:\/\/www.keris-studio.fr\/blog\/?page_id=2438<\/a><\/p>\n

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A series of 144 photos were made for this example. The photos are taken by rotating around the subject, taking care to have a coverage rate of 60% or more. Particular care must be taken with the coverage of the bow and stern.<\/p>\n

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Autodesk Recap<\/h1>\n

Create a new Object<\/p>\n

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Select 100 photos<\/p>\n

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Give a name and press start<\/p>\n

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The photos are uploaled. The process is done remotely.<\/p>\n

When done, the model can be downloaded<\/p>\n

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It appears in My Computer files<\/p>\n

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The model can be cleaned up<\/p>\n

The meshing is very dense<\/p>\n

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After clean up to be compared with the MetaMesh version.<\/p>\n

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Exporting model<\/p>\n

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Result<\/p>\n

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