Day 16 - more code

Today i added to my original program to make it so the user can now input the values by clicking on a b-scan. These values are then used to focus the data to the most important part, this includes removing air and other noise and looking at just the echo from the paper. In my down time today i tried to learn more about the Hilbert transform, because i didn't understand Maria's explanation even though it was very well done. It is hard to teach linear algebra concepts to a kid who has not even taken calculus. Monday I will hopefully fix this program and begin focusing all of our data so we can analyze it for the rest of the week and begin sending information to Portugal.

Day 15 - Data Focus

today Kunal helped me to finally get my program working that takes every A-line and crops the useless data out. This will create more precise data for us to analyse when we begin our quantitative analyses. Tomorrow we will probably begin calculating normalized moments out of each A-line.

Day 14 - Hanning

The first hour of my day was spent filing a report with the campus safety office about the recent damage to my car. After that i went to Kelsey's lab (because mine was being cleaned) to make a few more 3D surface plots of the paper and I also read a couple articles of propagated ultrasound detection. The basic idea is that a lower resolution transducer can pick up smaller objects then theoretically possible by receiving data from the horizontally propagated waves after collision with the surface. The rest of my day consisted of understanding the post processing matlab script to make a program that creates a Hanning window over the data to focus on the most important part.

This is a 3D model of the surface of photo paper, as you can see there are multiple very small (900 micron thick) lines that run across the  paper this is the key to what makes photo paper hold so much ink.

Day 13 - ImageJ

Today maria and I spent a lot of time using image J to create stacks of our B and C Scans. Then we made 3D models of the images, but matlab and Image J interpret color scales differently so we went back through and reprocessed the images on a 8 bit color scale (gray scale) to then reload them into Image J. We received some spectacular results that i will show you tomorrow.

Day 10 - Dark Side of The Paper?

after looking at the papers through a microscope we decided to also image the back side of the paper. This led to some very interesting results showing how the paper fibers were aligned through out the entire paper and how the pattern changed. we noticed that with the photo paper that it has vertical fibers on top and horizontal fibers on the bottom, that are all held together by diagonal fibers in the middle. Not something someone would expect from looking at this very reflective flat paper.

Day 12 - Rochester Precision Optics

Today we visited the Rochester Precision Optics factory. They produce lenses for everything from thermal sights on M16s to focal lenses in the Hubble telescope. After the tour Maria and I worked on making stacks of our images to better display the data collected. We also created 3D images out of the C-Scans by using a color analyzer in imageJ. hopefully these will help display the caracteristics of the paper to the Portuguese paper company.

Day 11 - more scans

Today was mostly about using my PSF data to redo my previous scans to make them more accurate. I had a problem with the post processing in our lab view program so Kunal made an addition to the post processing program to allow inputs. This makes it so I can use the program outside of lab-view. I am currently finishing up my second to last scan, tomorrow I will be processing these scans to get images.