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Category Archives: PhD
Remove defined variables from R environment
When I am debugging a piece of code I usually do it inside the R-terminal. It’s nice to do things this way because you can poke at things when something goes wrong. The only disadvantage is that you mush “refresh” … Continue reading
Posted in PhD, R
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Curious rounding in R
Sometimes R has a misleading way of displaying values. Check out this series of commands: > 1111+.5 [1] 1111.5 > 11111+.5 [1] 11111.5 > 111111+.5 [1] 111111.5 > 1111111+.5 [1] 1111112 > 11111111+.5 [1] 11111112 At first I thought that … Continue reading
Posted in commands, PhD, R
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How to output an eps figure in R
If you are executing a plot command in a R script it should default to generating a pdf document with your plot. This is really cool because you don’t really have to think about how to show what you have … Continue reading
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About opencv cornerSubPix
There were some issues with some of the classification tests I ran on the chessboard pictures from last week (you can find pictures here). The ones that were taken from a distance of a couple of meters or less, classified … Continue reading
Posted in opencv, PhD
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Image labeling is taking shape.
After discovering that the accuracy of the chessboard detection is increased by adding a black frame around the chessboard, I went on to create a python library based on what I already had. I created a python/C++ interface and some … Continue reading
Posted in opencv, PhD
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Paper: Fault Tolerance in Autonomous Systems: How and How Much?
Possible research for fault tolerance and robustness in autonomous systems: Agent based architecture: Though a three tier architecture is predominant in autonomous embedded systems, the agent approach could work because of 1.Avoiding semantic mismatch given that all agents have the … Continue reading
Posted in papers, PhD
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Chessboard format
It’s reasonable to describe the chessboard format. It’s relevant because not all chessboard dimensions are valid, The current implementation only detects 6 colors and there needs to be a black margin around the chessboard (among other reasons). Chessboard dimensions: We … Continue reading
Posted in opencv, PhD
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Unexpected solution to a detection problem
Before leaving for vacations I was fighting a very curious issue with my chessboard detection algorithm. All my tests were done with pictures of chessboards that occupied most of the image. The tests where very positive even for outside picture … Continue reading
Posted in opencv, PhD
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Phase Change Memory documentation
Regarding the project for the fall SDBS class in ITU of 2010. I will list some resources that I found that could be helpful in completing the PCM part of the project (Question 2). Though most of my list refers … Continue reading
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Adding a printer CUPS & SAMBA
The IT University of Copenhagen has this printing system where you have a centralized server receiving all the printing requests. I was having a hard time finding the way to configure my Fedora to talk to this server. A colleague showed me … Continue reading
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