On Wednesday, 8/6/15, Hailee, Angela, Paris, Dana and learned from Angie how to use simple photographs of things like Mt St Helens and turn them into detailed 3D images. Scientists like Angie have used Photogrammetry over the years to view how the mountain is changing and the glacier is moving, but this technique is used for other things like mining applications and rivers courses changing. Even police use photogrammetry to construct a 3D image of a crime scene so they can later reference and measure points in the crime scene even if it is changed. Because this science doesn’t require too much fancy equipment besides a camera and a algorithm you can find for free its very popular in less developed countries that can’t afford fancy laser technology. This technique has improved greatly over the years evolving from having to handpick points were two images points overlap to create clusters of hundreds of points from thousands of pictures. Today we used 130 pictures Angie took last week to create our very own 3D model of the mountain. The steps are to download the images, orient them to the surface, let the algorithm find all the points, and then create a DEM which connects the points into a surface. We learned it is always important to double check the computers work to mask sure it is putting the points in the right place.
After we learned how to make 3D images of the mountain we took our own pictures to create 3D images of our faces. This taught us just how hard it can be to get the necessary photos and overlap to create a detailed 3D image. Here are some examples: