Machan except the AF motor, seems to be D5100 is ahead than 600D.
http://snapsort.com/compare/Canon-600d-vs-Nikon-D5100
menna prices.
http://www.cameralk.com/dslr.php
Machan problem is Nikon has low price cams for Entry Level and Semi-Pro. Canon has not such. For example try to get the price of Nikon D5200 equivalent feature Canon.
Nikon has very good processional cam. Much much expensive and very much better in quality.
If you have DSLR, name the model...
Exactly.
I am a Nikon user. What I see between Canon and Nikon is, Nikon has low price cams, but lenses are not much cheap. For canon, body is expensive, but lense are relatively cheap.
Kollo uba image processioning library ekak hoya ganing mulin. Like OpenCV. Then u can do many thing with less effort. It has built in data structures functions etc.