This blog is permanenty moved to http://blog.ugurkoltuk.net/. Please visit http://blog.ugurkoltuk.net/ next time.
See you there!
Distributed Implementation of Normalized Cuts Image Segmentation June 13, 2010
This year I had my senior project from my school, and its topic was Distributed Implementation of Normalized Cuts Image Segmentation. Normalized Cuts are used in image segmentation and the algorithms based on this idea are generally considered as succesful algorithms. I had this project with a friend of mine from school, M. Salih Yıldırım, and in this project we aimed reducing the computing time spent in various steps of the algorithm by taking the chance of distributing the computation among many nodes over a cluster.
Reading/Writing PGM Files in C March 4, 2010
Howdy!
Last semester at school was rather tough for me. I had many classes and my junior project, and plus I had a lot of stress because I had no chance to fail in any class. Lucky that stress drives me through better motivation, I was successful in all of my classes and my junior project :)
Here in this post, I’d like to share a part of one of my Image Processing homeworks. It’s just two functions which read and write PGM files, so it’s no big deal. But some of my friends in class asked me if they could use my so-called API (hehe, imagine an API consisting of 2 functions :P) for their homeworks, so I thought it might be useful.
A Generic Settings File Editor March 1, 2010
Hello, after a long silence in this website!
After my Erasmus experience in Warsaw (which was greatly great) I returned back to my school and studies, and as soon as I came back, I was supposed to do my Junior Project, which is a generic settings file editor.
The idea behind this editor is as follows: There are various kinds of settings files in this universe. Any program may have one kind of it’s own. A systems administrator, a curious child, or anyone who somehow has to do something with these files, has to open the file in a conventional text editor like notepad or vi, and understand its contents, and do what he/she needs to do. This is the normal way to edit these files. But this normal way, has some drawbacks: (more…)
Writing a precise wait cycle subroutine for PIC Assembly February 8, 2009
Hi all!
I’d been studying PIC assembly recently, last thursday my teacher Gürbüz Aslan taught us how to write precise wait subroutines for pic assembly, that waits for the exact count of given cycles. There was a theoretical part in the beginning (a very brief part) so i had to write the post in pdf form. It’s hard for me write formulas here.
The “paper” is below if i can manage to put it here: :)
Counting up to more than 256 using two 8-bit registers January 23, 2009
possibly new for most of you, lately I’ve started practising with some pic processors. not with a specific type of a pic microcontroller, but mostly with the 14-bit core pic16 family.
here’s the deal, i’m not going to dive deep into pic16 or any microcontroller architecture, but give this brief statement on what i’m trying to do:
using the pic assembly language, if you try to code a loop, you can use a file register(that is, one byte of pic’s ram) as the counter variable. but using one file register, since the processor is an 8-bit processor, you can count up to 256 at most. so, how do you code a loop that iterates up to 3956, for example?
my very first english post January 4, 2009
From now on, I am going to compose my posts in English. I can hear (if there is anyone reading) you saying “Why is that?” The reason is simple. I am using this blog to express myself, and writing in a language commonly used around the world simply gets me to more people.
Now it sounds more notifiable: (again, if there’s someone reading) “Is there anyone who reads this blog and doesn’t know Turkish? Or let’s just say, is there anyone who reads this blog at all?” Well, to be honest, I don’t know. I see an average of 10 people visit my blog everyday. (which is not a great number of visitors) Yet, I believe that in time, as I add posts in different topics, my visitors will increase in count and thus maybe some new visitors will be foreigners. Even if I keep being the only visitor of my blog, I find it more appropriate to write in English in order to improve my skill in English. It is a good practice for me to write my thoughts in English.
I am ending this post paraphrasing a guy whom I have no idea of his/her identity:
“dad, what is windows 95?”.
“well, it’s 32-bit extensions and a graphical shell for a 16-bit patch to an 8-bit operating system originally coded for a 4-bit microprocessor, written by a 2-bit company that can’t stand a bit of competition.”
oyun zamanı December 30, 2008
geçenlerde abim nette dolaşırken güzel bir oyun bulmuş. paylaşayım dedim.
oyunda bir robotu programlayarak bazı işler yapmasını sağlıyorsunuz. ancak oyunu oyun yapan, çok eski zaman bilgisayarlarında (ve günümüzün bazı gömülü sistemlerinde ve mikrodenetleyicilerinde) olduğu gibi, çok sınırlı bir komut setiniz ve kod belleğiniz olması.
bir tür zeka oyunu diyebiliriz. programcı olmayanlar sever mi bilmem ama en azından bir bakın derim. puzzle sevenler için bire bir :)
işte link:
http://www.gameroo.nl/games/light-bot
iyi eğlenceler
görelilik teorisi çöktü! (mü?) December 10, 2008
Az önce MSN’de bir arkadaşım Einstein’in görelilik teorisinin çöktüğünü, hem de çökertenin bir Türk olduğunu söyledi. Doğal olarak “nee?” şeklinde bir tepki verdim. Kendisi ayrıntılarla ilgili aşağıdaki linki attı:
http://okan.edu.tr/tr/okan.php?s=hab_duy&no=507&a_no=1
Açıkçası linki gördüğümde şaşırdım. “Okan Üniversitesi mi?” Ne zaman ismini duysam şaşırdığım bir üniversitedir Okan Üniversitesi. Okan diye üniversite mi olur ya? Olurmuş. Hem de en kallavisinden :) (hatta bu olay fiyasko çıkmazsa Yıldız Teknikten 10 kat daha saygın üniversite olur sanırım.)
Yukarıdaki linke göre, teoriyi çürüten adam Tolga Yarman isimli bir fizik profesörü. Yarman soyadını ve MIT ismini duyunca hemen bir isim geldi aklıma, Faruk Yarman. Faruk Yarman, geçenlerde bizim okula gelmiş, okula bir konferans bana da inanılmaz bir ayar vermişti. Şimdi görüyorum ki, belli ki kendisi gibi zeki olan kardeşi de Einstein’e çok sağlam bir ayar verme iddiasında. Teori çöker mi çökmez mi bilemem ama olur da teori çökerse, kardeşlerin ayar verdikleri insanlardan biri Einstein ise diğeri de benim, demek ki Einstein ayarında adam olabilirim :)
Şaka bir yana, yukarıdaki linkte ismi geçen diğer adam Metin Arık, bildiğim kadarıyla Boğaziçi Üniversitesi Fizik bölüm başkanı. Eşi rahmetli Engin Arık, CERN’de çalışıyordu. Ayrıca bildiğim kadarıyla o da Boğaziçi Üniversitesi’nde fizik bölümü öğretim üyesiydi. (profesör olması lazım) Türkiye’den daha nice böyleleri çıkması ümidiyle, darısı diğer fizikçilerimizin başına.
blog sitesi yazarken… November 26, 2008
Efendim bendeniz şimdiye kadar pek çok defa web sitesi yapma girişimlerinde bulundum. Doğal olarak, pek çok “şu olsa güzel olurdu” durumuyla karşılaştım. Bu yazıda, bu durumlardan birini ve kendisine getirdiğim çözümü anlatacağım.
Yazdığım ilk bloglardan birinde, sık sık dışarıya referans verme isteği içinde yazılarımı yarıda keser, sağdan soldan web adresi kopyalar, sonra blog sisteminin post editörünün görsel modundan HTML moduna geçer “<a href …” işlemleri yapar, sonra tekrar görsel moda dönerek yazdığım şeyi yazmaya devam ederdim. Gördüğünüz gibi zahmetli iş. Bu işi kısa yoldan halletmenin bir yolunu bulmam gerekiyordu. Ben de tabii ki buldum.
