Magnetic resonance imaging (#45)

Posted in 100 day challenge with tags , on February 11, 2011 by dingobat

Back from vacation! I had a really nice time snowboarding with friends in Sweden. The plane was to do some photo projects for the blog while I was there but unfortunately I had packed in a hurry and forgot my camera charger. I was only able to take about 5 shots before the camera died on me. I turned out was not so bad being forced to take a break from photography, doing the daily photo projects have been taking more time then I initially imagined when starting out and it was nice to focus on other things for a while. Hopefully this break will end up being beneficial because I will be able to approach the coming photo projects with renewed energy.

Back to the topic of today’s photo project, magnetic resonance imaging (MRI). I some times work as professional guinea pig where I am paid to participate in different medical studies. For me it is a really nice way to make some extra money while I am studying. Most of the time it is interesting work and I get to meet a lot of interesting and knowledgeable people plus I get acces to a lot of data on my body that I probably would not be able to get in other ways.

Today I got a MRI brain scan as part of one of the studies I am participating in and I was able to get a copy of the resulting digital file. After a little research I was able to find a piece of software that would allow me to open the scanner file, MRIcron. It is always nice to experience that people are willing to give away software that the they put a lot of time and effort in.

The scanner file consist of a lot of image slices so that you are able to see different parts of the brain. This could e.g. look like this.

 

Last time I got an MRI I made as screen grab while navigation around the scanner file using MRIcron. It is weird to look inside one’s own brain

 

 

The last thing I did was to overlay the MRI profile image onto a real profile image of myself. I looks spooky but I like it.

 

Going on vacation

Posted in 100 day challenge on January 28, 2011 by dingobat

The next week or so I will be going on vacation so most probably there won’t be any updates during this time. The aim is still to try out a 100 photo techniques in a 100 days so I will have some catching up to do when I get home.

Vertical concentrated time-lapse (day 44)

Posted in 100 day challenge with tags , , on January 27, 2011 by dingobat

Todays post is a little technical but the process described yields an interesting result. I liked the idea from yesterday of a concentrating a time-lapse into one picture. The problem is that the number of photos that can be included in the picture is limited by the time it takes to manually cut out the individual parts and put them back together again. I researched on how to automate the process and found the open source software ImageMagick. This image editor has a very cool feature, it can be used from the command line and can process a batch of photos based on a script. To get the script part working in Windows I had to install Cygwin and run script through that (“Linux-like environment for Windows making it possible to port software running on POSIX systems” according to the website).

Luckily I found an already made script that did what I wanted it to do. What the script does is to cut out a vertical slice (a few pixels wide) of each picture in a folder and then “glue” them together into one picture in chronological order. The process is described in detail on this page.

These are my results applying the scrip on my kaleidoscope and ice melt time-lapses.

Concentrated time-lapse (day 43)

Posted in 100 day challenge with tags , on January 25, 2011 by dingobat

These pictures consist of squares cut out from time-lapse photos I have taken from the kaleidoscope time-lapse and the ice melt time-lapse. The idea is that by building a mosaic of part of these picture, a slice of time is portrayed in one frame. It would be really nice to try this out on a time-lapse with more activity e.g. a busy metro station or a “from dusk till down” time-lapse.

The first picture has the photos in canonical order starting from the midpoint and moving outward in a spiral, with the other picture this is reversed with the first photo starting in the upper left corner.

 

 

Mirrors (day 42)

Posted in 100 day challenge on January 25, 2011 by dingobat

Used a mirror to take these photos. Interesting effect, I especially like when they are oriented differently than normally (e.g. upside down).

Kaleidoscope lens part II (day 41ish)

Posted in 100 day challenge with tags , , on January 24, 2011 by dingobat

Just an add-on on yesterday’s post. This is the time-lapse video made with the kaleidoscope lens.

Kaleidoscope lens (day 41)

Posted in 100 day challenge with tags , , on January 23, 2011 by dingobat

I have been looking for a kaleidoscope for a long time. Judging from the toy stores I visited it does not seem that it is a very popular toy these day. I mentioned this to my brother and in no time he showed up with three different types of kaleidoscopes (two for creating abstract patterns and one that creates patterns based on what is in front of the lens).

I cut holes in a balloon and used that to fasten one of the kaleidoscope to the lens of my dlsr, this both kept it in placed and prevented some light leaks.

These are some of the results of shooting with the lens.




I also used my canon pocket camera with CHDK to make a movie of the kaleidoscope that created a moving abstract pattern. I experimented with both making a time-lapse and using the movie mode. The time-lapse can be found in the next post.