Rotating a line from a point

[TinWhisperer]

@danzick

I took a picture, and followed the lines with the canvas. I calibrated the top, so its the right size, but the bottom is out of square and too narrow.

The main hurdle here is the difference between Orthographic view ( CAD ) and a Perspective ( Camera) view.

You have taken this picture a little higher then center ( this is why it is narrow at the bottom ) and from about 8’ back. While is picture from a camera is a good representation of 3D reality on a 2D image, it does a poor job of capturing 2D information in a 2D image. 2D information is distorted because of our(the cameras) point of perception of it through 3d space.

While there are methods to “straighten” the photos information using the relationship of the camera lens to the object and field of view. This is not an easy undertaking and will still only be a interpretation .

This problem is one of the reasons I bought a 3D scanner.

Learning how to 3D scan

I’ve been wanting to learn how to 3D scan and finally some 3D scanner technology has become affordable enough to start getting my feet wet. Back in December I backed the Revopoint Pop 2 Scanner on Kickstarter. The scanner arrived on April 13th and on this holiday weekend I’ve had the opportunity to start reading and setting up for this adventure. I’ve joined the Revopoint 3D forum currently trying to read and understand everything. I am also @TinWhisperer over there too, for anyone else get…

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• Orthographic views are flat, non-perspective representations of objects that preserve the angles between lines and keep parallel lines parallel.

• Perspective views are three-dimensional representations of objects that give the illusion of depth and distance by making objects that are closer appear larger than those farther away, and by having parallel lines converge at a vanishing point on the horizon line.

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