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10.5 mm lens coverage on a Nikon D200

I just un warped one of the photographs from my camera. I am surprised to see the coverage a 10.5mm lens has. Due to the fact that my Nikon D200 does not have a full frame sensor, the lens behaves like a 15mm lens.

A 15mm lens has about a 114 degree field of view. A human eye has about a 180 degree field of view. This star that the 15mm lens sees would be even more exaggerated.

105.mm or 15mm lens coverage

105.mm or 15mm lens coverage

I have made a lot of mistakes in the last four days and learned valuable lessons about AgiSoft StereoScan, the free program I am using to convert stereo photographs into 3-D meshes. I noticed a problem that when I blended the photos in Photoshop first the floor often melded with the material and StereoScan treated it as a floor plane. Download the 3-D model.

StereoScan lessons

StereoScan lessons

After a lot of trial and error, I found a way to blend multiple photographs and build a 3D model in StereoScan. I ended up manually selecting and deleting everything except the illuminated material in each layer of the sequence. Then StereoScan could map the volumes of the multi-frame packet.

stereoScan volumes

stereoScan volumes

This is the method for converting stereo pairs of photographs into a 3D model:

  • Record synchronized stereo photographs.
  • Manually delete everything in the frame except the illuminated material.
  • Load the blended left and right images into StereoScan
  • Create a 3-D model

The models may, of course, be imported with other programs. I used Rhino with V-Ray to make a quick render of one of the simplified surfaces.

Rhino with V-Ray render of original form

Rhino with V-Ray render of original form

Rhino with V-Ray render of rebuilt surface

Rhino with V-Ray render of rebuilt surface

ephemeral

lasting a very short time; the autumnal blaze of colors is always to be treasured, all the more so because it is so ephemeral
Merriam-Webster Dictionary

Abney Park Cemetary

ScanLAB scanned a burned out, decaying chapel and created stunning images.

ScanLAB Abney Park Chapel

ScanLAB Abney Park Chapel

Their representation of the building as a ghosted, translucent ghost against the dark background of trees reminds me of how ephemeral models represent time and movement. ScanLAB’s results make the building seem like it is another ghost in the cemetary, a transitory visitory instead of a solid stone building.

stealth objects and scanning mist

ScanLAB are my people. They thought it would be interesting to see if they could scan mist and smoke. Their hunch was right. It is interesting. This is a scan of mist they created.

ScanLAB mist scan

ScanLAB mist scan

In a way I have been chasing a similar ghost. Ephemeral modeling relies on capturing light as it intersects with a reflective object with a camera. ScanLAB is capturing mist as their laser scan sees it.

via: BldgBlog

AgiSoft StereoScan is a free program that can convert a stereo pair of photographs into a 3D model. I am exploring the technique of photogrammetry in stereo to convert ephemeral models into 3D, digital surfaces. This is the first test. The model may be orbited by clicking and dragging the surface. Download a pdf of the stereo photogrammetry test. The newest version of Acrobat reader is required to view the 3D surface.

memory

“We internalize our experiences as lived situational, multi-sensory images and they are fused with our body experiences. Human memory is embodied, skeletal and muscular in its essence, not merely cerebral.”

Juhani Pallasmaa; Space, Place, Memory, and Imagination; in Spatial Recall; pp. 21

Ephemeral modeling creates two artifacts. One is a bodily, muscular, kinesthetic memory of multi-sensory design lessons learned by experiencing space with occupants. The other is a two dimensional, photographic, blended memory artifact of that bodily experience.

Version #15

Ephemeral modeling enables architects to transform occupant needs into full scale, interactive, four dimensional experiences and rapidly iterate design ideas.

This photographic tool compresses the duration of a design experience into one glimpse of a space.

reconstructed forms in space

This project is eerie and strange and beautiful. Project 12:31 uses images from Texas murderer, Joseph Paul Jernigen, to create these images.

Project 12:31

Project 12:31

Thanks for sending this Jack.

untangling thoughts

Throughout this project I have struggled to explain my ideas. This is another attempt to clarify this project, its relevance to the field of architecture and its assumptions.

second review interim report

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