Photo stitching in 123D Catch

I wanted to show a couple of things quickly that came up when scanning the second set of teeth. I used basically the same setup process and here is how it turned out in the first shot-

Not bad but I wanted to see if I could fix the gaps on the front of the model using the ‘photo stitch’ option in 123D catch. Using this feature you can pick the same point on the model in 3 separate photos to give the software a little help in understanding your pictures.

After stitching a few photos and resubmitting the project for calculation, I was able to get a scan possibly better than the previous one-

There you have it! I hope that this has been helpful or interesting to some of you and if you have made it this far thank you for reading. I am not done posting  but as of this post I finally have you all caught up on my current progress. Happy Arting!

Teeth scan second attempt!

I tacked small pieces of tape to each tooth to preserve the model and then placed a small dot of acrylic paint on each sliver of tape. Using a toilet paper roll painted black I created a stand for the model and placed it on a sheet of grid paper that will hopefully help the software track my model. Here is a pic of the new setup-

I took 50 some odd pictures from different angles and here is the result-

Much better! This scan captured a much closer representation of the volume of the object and I was able to take the model, and with much deliberation, optimize/ quadify the mesh for use in Sculptris. I used rectangular wedges to cut gaps into the mesh where the spaces in between the teeth belong.

Finally I wanted to post an image of the texture unwrap generated by default in 123D Catch-

Teeth scan first attempt

I took the model of my upper teeth and used dental floss (irony) to suspend it from a lamp in my apartment. My thought being that with the model suspended in mid air I would be able to take pictures from every angle more easily. Photo of the setup below-

Here is a screen grab from the scan in 123D Catch-

I must say that I was quite disappointed with how this turned out, it basically interpreted the model as a curved plane, when I really wanted to get a scan of the volume of each tooth. Despite this setback I decided to see if I could trouble shoot the problem.

These were my thoughts:

First, I thought that not having the model on a ground plane was making it difficult for the software to find enough points of reference  for the depth of the scene. Secondly I had the idea to place small colored markers on each tooth to help the computer have more points to track. I will try and set this up again and see if we can get some better results.

1… 2… 3D!

Autodesk has recently put out a new series of free software for us to play with! The series consists of 4 programs, 123D, 123D Catch, 123D Sculpt, and 123D Make. 123D seems to host an array of features including basic modeling tools and the ability to make 2D representations of 3D models for the use in blueprints or prints that use laser sheets. 123D Catch allows users to use any camera to take pictures of an object, and stitch them together to create a textured model of that object on your computer (or iPad). 123D Sculpt is an iPad app that does pretty much what it says- sculpts and paints textures onto objects that you can manipulate like clay. 123D Make is a program designed specifically to turn your digital models into physicals models. To do this, it converts your 3D mesh into 2D representations that can then be printed on a material (such as cardboard) and stacked to build a real-life version of your model.

In the next couple of posts I am going to be experimenting with 123D Catch to see if I can come up with a workflow for scanning a dental model of my own teeth, and using the generated mesh in the male figure study that I am working on. So let’s get started! Here is a picture of my top row of teeth-