27 febrero 2009

Quantization by Dummies

homersimpson Every time it happens to me, I remember the episode in The Simpsons where Homer wants to get a raise when he was working at Bowlarama, he proposes to Al to triple the business, then you can see Homer reading “Advanced Marketing”, next scene the book is in trash bin and Homer is reading “Basic Marketing”, after that you can see a pile of books in the trash and Homer looking for the word “marketing” at the dictionary…

I had to read an technical article related to Quantization and present an explanation for the Digital Image Processing class in a workshop session. The teacher gave us a list of articles related to quantization and she asked us to choose one of them. The first problem we faced was the availability of the papers, although the university has some kind of subscription with IEEE and ScienceDirect, the number of articles available for us to download was very limited and the date of them was quite old.

While looking at the titles of the papers “the” question was arisen, which article should I choose? First of all looked at the articles that sounded good to me, then I realized that none of them were available from IEEE, and couldn’t connect to ScienceDirect from school. Then I started searching any article from the list available from IEEE was Generalized Scalar Quantizer Design Using Dynamic Programming (bear in mind that if you don’t have a subscription you can’t see the article). The article is three pages long, but I couldn’t get to understand it enough to make a presentation.

I gave up searching the articles from the list and started surfing with Saint Google, I don’t remember the keywords I used to search, but I came up with “Optimal Entropy-Constrained Scalar Quantization of a Uniform Source”. It’s funny because while writing this post I was looking for the link to this file and found that the one of the coauthors of the article, ANDRÁS GYÖRGY,  has a bunch of his papers published listed in his publication's page, are available to download and some of them are about quantization.

After that, troubles has just begun, I started reading the article, and realized that most of the ideas were unclear to me, then I had to go to the books to search for the definition of the term I was stuck with, but while reading the definition I found also some things that for the moment I wasn’t able to understand, besides that I couldn’t found any ‘for dummies’ book about digital image processing, go figure, and it’s obvious there is no such thing. So I was reading in circles, finally, I put some kind of order in my ideas and made a presentation with the concepts I got. Still, it wasn’t enough to be clear the concept proposed in the paper, at least for me.

The best thing that I recall from this exercise is that it helped me to understand that research is not easy, but reading and sharing the little knowledge acquired, is the only way to start learning new things, it opens the mind to a different level, because we can see the work other people involved in the same field is doing, and also get fresh ideas from our peers, remember that feedback is always good and there is no such thing as “constructive nor destructive” critics.

2 comentarios:

  1. Corazón, el blog va viento en popa! Felicidades!! Me encanta como escribes, hombre a una nariz pega'o. Eres un hombre culto sin duda. Hombre que sabe latín.... (al menos lo soñaste en mis desveladas)... tiene mal principio pero excelente fin!! You're so cute.

  2. Hola Gustavo, aunque no entiendo ni media palabra de lo que tratas en este blog, me parece genial que lo tengas, además de la forma en que planteas los problemas teóricos y prácticos de esta árez del saber: diálogando con tus lectores. Felicidades y, enmis ratos libres a las tres o cuatro ela mañana, pasaré a intentar enteder tu mundo.
    Susana B.


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Blog dedicado a escribir sobre Sistemas Embebidos y el Internet de las Cosas o IoT que le llaman.