3D Project Seminar

3D Project Seminar

Pushing the Boundaries of 3D Printing

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February 2017

There were 10 posts published in February 2017 ().

Resulting Prints of the STL Infills

Dear Reader, This week we’re able to see some physical prints of the stl infills generated through the process described my last week’s post. The prints and pictures are all courtesy of Professor John Bowers. Here are photos of a print using the shell included: Thanks for tuning in this week. -Xiang

by Xiang Chen February 27, 2017 | Comment

Xtion Pro Live Stereo Camera and OpenNI

This week I have been setting up the ASUS Xtion Pro Live Stereo RGB camera to be used along with an open source SDK known as OpenNI for quick prototyping and 3D motion/depth sensing.

by Adam Slattum February 26, 2017 | Comment

Quick Update on the 3D Printing Project

As the title suggests, this is just a quick update on the 3D printing project I’ve been doing this year. First, after multiple failed attempts to print the Perko knots attached to pegs for the praxinoscope, I have finally created a model that passed all of Shapeways’ tests! The link to its page is here. Here are […]

by Jonathan Gerhard February 22, 2017 | Comment

Conversion of Graph to Solid Complete

Dear Reader, This past week I have read over the official OpenSCAD documentation and achieved a limited but sufficient understanding of the OpenSCAD scripting language. To the Sphere Packing software, I have added a new file output for the graph edges as well as a file output for the mesh triangles. Unfortunately, since it doesn’t […]

by Xiang Chen February 20, 2017 | Comment

BoofCV, Image Segmentation, and 3D Scanner

This past week Dr. Bowers and I met in order to come up with some ideas as to how to move forward with our problem of comparing meshes and/or images for error detection. Essentially, we were able to address some problems we’ve been having with some new ideas.

by Adam Slattum February 17, 2017 | Comment

First Steps Toward 3D Printing Meshes Generated By Sphere Packing

Dear Reader, A major goal of my Sphere Packing research is to actualize the mathematics and computer models into novel techniques for the mesh generation portion of the 3D printing process. To this end, we need a way to complete the full process starting from an STL model of a 3D object and ending with […]

by Xiang Chen February 13, 2017 | Comment

OpenSfM Revisited, Epipolar Geometry, and Possibility of Rendering

I’ve continued to delve into the OpenSfM configuration files to attempt to get denser meshes without much promise. The meshes seem to be similar; however, with the yellow spiral I did receive a less distorted image that could be on the road to where we want to be.

by Adam Slattum February 12, 2017 | Comment

Visualizing the difference between the 4×4 Rook’s graph and the Shrikhande graph

In the summer of 2015, I did a research project characterizing the critical groups of the Rook’s graph and its complement. I won’t be talking much about that specific project here – instead, I just want to look at the structure of the Rook’s graph. The Rook’s graph is a specific type of chessboard graph. […]

by Jonathan Gerhard February 12, 2017 | Comment

New Lattice Structure and Other Ideas Going Forward

Dear Reader, Since the last time I posted, I have added the ability to generate a different lattice structure to the Sphere Packing software. This new lattice structure is called the hexagonal close packed (hcp) lattice. It is one of the tightest ways to pack equally sized spheres, with the other way being the face-centered cubic […]

by Xiang Chen February 6, 2017 | Comment

Progress with OpenSfM (Structure for Motion)

I’ve made some progress in the past week with getting a implementation of OpenSfM running on my own machine and finally have done so. I ran a couple of test 2D images through the reconstruction pipeline with moderate results. So, I thought it was time to run some actual 3D printed material through it.

by Adam Slattum February 3, 2017 | Comment

Spring 2017 Students

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  • Jonathan Gerhard
  • Adam Slattum

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