Category Archives: PhD

The marker thingy worked :)

Posted on November 25, 2010 by joelgranados

After a week of debugging I got the code to do what I wanted.  I have successfully detected a bit stream in the chessboard marker image.  I had to correct for a small error that I encountered las week that … Continue reading →

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Principals of Computer System Design: Some comments (II)

Posted on November 22, 2010 by joelgranados

While doing some more problems I noticed some more little issues that I want to get down before I forget: There is a misspell on page 282 in the before last paragraph, second line.  It says “flip-flip” when it’s supposed … Continue reading →

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Principals of Computer System Design: Some comments (I)

Posted on November 17, 2010 by joelgranados

This semester I was TA in a class called Building Database systems, Taught by Philippe Bonnet.  The class had a strong systems design focus and the book that was used was Principles of Computer System Desing by Jerome H. Saltzer … Continue reading →

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New project image label

Posted on November 17, 2010 by joelgranados

After some weeks of fiddling with opencv chessboard functions, I finally managed to detect some information on a modified board.  I do still need to address some small mistakes that are related to color detection.  These should be ironed out … Continue reading →

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New Annotation feature

Posted on October 22, 2010 by joelgranados

After discussing the current state of the annotation software, I realized that it needed a  bit of attention.  One of the issues that we discussed, and the one that stayed in my head, was the strangeness when editing the annotations. … Continue reading →

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The pictures are here!!!

Posted on September 18, 2010 by joelgranados

A couple of weeks ago I received a zip file that contained pictures taken in the arctic.  They were very neatly organized in dated folders.  I received pictures from two cameras.  One of them was intended to test a special … Continue reading →

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Back of the envelope: Remember! There is a compiler.

Posted on September 9, 2010 by joelgranados

Thx to my adviser I realized that there is a compiler translating the stuff that I code.  This becomes extremely relative when you are trying to time certain things.  Is the compiler really translating the code that I write to … Continue reading →

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Back of the envelope.

Posted on September 6, 2010 by joelgranados

Was reading Jon Bentley Programming Perls (second edition) [1] and  I don’t feel particularly good confessing that I had not read this book before.  It has lots of really nice programming tidbits that can be very helpful in the day-2-day.  … Continue reading →

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Image adjust, Its working!!!

Posted on September 2, 2010 by joelgranados

Finally got a working command out of my opencv experiment.  I still need to work on some additional aspects.  but the overall src is already finished.  I ended up with 3 major states for the command: video_demo:  This state shows … Continue reading →

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Paper: Reducing Power Consumption of Image Transmission over IEEE 802.15.4/ZigBee Sensor Network

Posted on August 30, 2010 by joelgranados

Topic of interest: Energy consumption of image transmission in Wireless Sensor Networks. Approach: “Power reduction while transmitting images in WSN over IEEE 802.15.4/ZigBee by disabling MAC acks”.  Some additional control messages needed to be implemented in the application layer. year: … Continue reading →

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