Talk:3D scanning

Laser Stripe scanners

I am not a scientist or engineer, below is how I Understand the laser scanners that I use work, I use Cyberware and various other scanners in my laser scanning bureau here in London, I would like to contribute any knowledge I have but am not sure I am correct on everything below, so please feel free to add comment to this and use any of it for the main page, and/or ask me any questions I may be able to answer.

I am not sure the triangulation as described is actually how the laser stripe scanner works. As I am aware the ccd device captures the frames as images i.e. a video stream is captured as single images, the images are then rotated at the angle needed to correct the profile to 90 degrees, scaling is a purely mathematical formula commonly known as a correction table, the correction table also may contain data to correct any known issues e.g. imperfections in the flatness of any mirrors invloved. some scanners are pre-calibrated form the manufacturer, but there are some that require calibration especially if they are mounted on a rig.

this results in images with one white pixel in the row and column that the laser light falls into, the rows and columns making up the profile.

The laser stripe scanner, often referred to as light-section method, does not use rotations or scalings for data generation. The line projected spans a spatial plane which intersects the object's surface resulting in a deformed contour in the camera image. From a prior calibration procedure the orientation of that plane and the camera position and orientation is obtained. In the following steps the viewing direction from each contour pixel through the optical center of the lens is intersected with the plane resulting in a 3d coordinate. It's basically the same triangulation approach as it is used for point based camera/laser sensors. For a more detailled description on the calibration procedure and 3d data extraction you should take a look into the phD-thesis of C. Teutsch.

Merger

Wide overlap between:

• 3D scanner
• 3D reconstruction
• 3D data acquisition and object reconstruction

Especially the last one needs attention. fgnievinski (talk) 04:39, 11 July 2016 (UTC)

I would suggest that all the content relating to 3D reconstruction from images; both single and multiple image belongs in the Photogrammetry Page. Specifically we should consider moving the information from here:

• 3D data acquisition and object reconstruction#Acquisition_from_2D_images
• 3D reconstruction from multiple images
• Most of 3D_reconstruction#Passive_methods

into the Photogrammetry page. This can then be linked from the 3D Scanner page as Photogrammetry is a well known name for this research topic. And is used consistently for this topic in Universities. The 'active methods' section of the 3D Reconstruction page should go into the 3D scanner page, the 3D reconstruction page can then be deleted. 193.86.249.246 (talk) 09:46, 17 July 2016 (UTC)

Closing, given no support for any specific action and discussion stale for more than a year. Klbrain (talk) 21:27, 9 November 2017 (UTC)

Proposed merge of 3D data acquisition and object reconstruction into 3D scanning

3D data acquisition and object reconstruction are two separate topics namely 3D scanning, 3D reconstruction

This article seems to be mainly a poorly cited product listing, though some information may still be salvaged from it to be added to those existing articles. Ethanpet113 (talk) 16:07, 10 April 2020 (UTC)

  Y Merger complete. Klbrain (talk) 13:21, 24 January 2021 (UTC)

Proposed merge of Volumetric capture into 3D scanning

The following discussion is closed. Please do not modify it. Subsequent comments should be made in a new section. A summary of the conclusions reached follows.

To not merge, given that the topics are sufficient distinct (with some overlap admitted) that readers are best served by keeping the content separate. Klbrain (talk) 11:52, 8 January 2023 (UTC)

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same techniques fgnievinski (talk) 20:22, 7 April 2022 (UTC)

@Fgnievinski: I don't think the entire article should be merged; "volumetric capture" is not a synonym of "3D scanning," but just one of many applications of 3D scanning. It's similar to spatio-temporal reconstruction, which consists of reconstructing 3D animations from moving 3D scenes. Jarble (talk) 02:07, 26 June 2022 (UTC)

not the same thing - volumetric capture typically = moving image. workflow, tools and outputs for volumetric capture and 3d scanning are very different. 142.114.110.15 (talk) 10:30, 8 August 2022 (UTC)

Those are two different terms with different meanings. A bit of overlap does not change that. North8000 (talk) 17:57, 8 August 2022 (UTC)

I'm in agreement with the other commenters. My takeaway is that what really distinguishes volumetric capture from 3D scanning is that volumetric capture is a complete scan as opposed to a reconstruction of a 3D object. Volumetric capture has many content issues, but it's still different. SWinxy (talk) 18:28, 12 August 2022 (UTC)

The discussion above is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.

Circumvention of shipping costs and international import/export tariffs

This section sounds like pure speculation. Thinking of cutting. Uhoj (talk) 12:54, 6 March 2024 (UTC)