Last few days at college
Just taking a moment out to dedicate some space from one of the last few days that remain at college. The experience turned out very good, and will always remain with me. Sad and happy.
Posts
CV dilemma
Looks like there's a problem with OpenCV's distributed parameterization of coordinates used during the camera calibration tasks. Three distinct sources of information on img distortion formulae apparently give three non-equivalent description of the parameters and equations involved: (1) In their book "Learning OpenCV" write regarding lens distortion: xcorrected = x * ( 1 + k1 * r^2 + k2 * r^4 + k3 * r^6 ) + [ 2 * p1 * x * y + p2 * ( r^2 + 2 * x^2 ) ], ycorrected = y * ( 1 + k1 * r^2 + k2 * r^4 + k3 * r^6 ) + [ p1 * ( r^2 + 2 * y^2 ) + 2 * p2 * x * y ], where r = sqrt( x^2 + y^2 ). Assumably, (x, y) are the pixel coordinates (in pixel units) in the uncorrected captured image corresponding to world-point objects with coordinates (X, Y, Z), camera-frame referenced, for which xcorrected = fx * ( X / Z ) + cx and ycorrected = fy * ( Y / Z ) + cy, where fx, fy, cx, and cy, are the capturing camera's intrinsic parameters. Therefore, having (x, y) from a ...
New Multitouch Notebook, Mozilla Labs, GSoC and fun
Its week two weeks since I finally bought myself a Acer Aspire 5738 pzg multitouch (actually dual-touch) notebook. Its a welcome change, since for the past two years our multitouch experiments required a lot of background effort due to our utter dependence on our custom built MT screen. The capacitive screen is good, its responsive and precise . They've a Python apploader called Acer Touch Portal which runs a couple of cool Microsoft Surface apps (Globe, Collage, Blackboard etc.). Overall UI of the app is not so impressive though. Form-factor wise its just a laptop, so multitouch is not going to add much of functionality to the device, apart from merely being a show-off feature :) The app looks like more of an Acer's attempt to show Multitouch proof of concept! Looking at the Multitouch hullabaloo everywhere, i didn't expect that to happen atleast. For DIY and multitouch community its a good tool for quick development and testing of apps. I used Mozilla Firefox and I...