Undergraduate Research at the Vis Center

Week Three (visu)

Week 3 (Software tools)

This week I have been working with the data for on the server.  The images that mobile devices download need to have different sizes. Adobe’s Photoshop is a powerful tool when working with large quantities of images. My previous work has all been on Photoshop CS 3, but now Photoshop CS 6 is standard.

Meshlab is the tool we use most for working with the 3d data. It is a general-purpose mesh viewer. It is open source, but it is still buggy.

 

The 3d data that we have has around 100,000 points for each page. This is too much data for a portable device to use. Fortunately there is a function in mesh lab that allows us to interpolate and reduce points.

 

 

Most cameras use the Bayer pattern to capture RGB data. In the Bayer pattern every color-sensing element is red green or blue.

 

 

 

Our camera does not use the Bayer Pattern. Instead our camera takes black and white images. These black and white images are at a much higher quality. When we want a color image, we shine a red light on the subject and take a black and white picture. Then we shine a green light on the subject and take a picture, and then a blue light.

 

After taking multiple photos we have to merge the images back together.  Voxels are multi dimensional pixels. We use UNU to make files called (.nrrd) files. These file make up multi dimensional images, where each dimension is a color spectrum.