Comments for AI Shack

Comment on Color spaces by joseph

joseph — Tue, 31 Jan 2012 07:25:26 +0000

there’s none.

Comment on OpenCV’s C++ interface by marekbar

marekbar — Mon, 23 Jan 2012 23:12:37 +0000

That was helpfull. I was struggling with doing PCA and I couldn’t figure out how to convert old API stuff to make it work. Thanks for this.

Comment on Tracking colored objects in OpenCV by Jose Garcia

Jose Garcia — Sun, 22 Jan 2012 23:38:28 +0000

Thank you very much!!!!
We are doing a eyetracking and you code was absolutely useful for us!

Comment on Linear separability by Sumit

Sumit — Sun, 22 Jan 2012 10:59:23 +0000

really such a nice example …thankyou…

Comment on An introduction to contours by Knighk

Knighk — Sun, 22 Jan 2012 10:29:43 +0000

Thank you utkarsh! This will really help me alot. ) A very nice tutorial! I hope even if you’ll graduate already, you’ll still find time teaching newbies like us. ^_^

Comment on Hough circles in OpenCV by Utkarsh

Utkarsh — Sat, 21 Jan 2012 20:48:33 +0000

I guess you’d do something similar to this.

Comment on Hough circles in OpenCV by rbni2

rbni2 — Sat, 21 Jan 2012 18:10:38 +0000

what will i do if i want to track real time motion of a tennis ball?would u please help me in this?please give me the source code if u have one.

Comment on First artificial neurons: The McCulloch-Pitts model by Sumit Singh

Sumit Singh — Sat, 21 Jan 2012 17:12:33 +0000

thanks bro! , very good n easy to understand explanation, u can b an awesome teacher

Comment on OpenCV Memory Management by Utkarsh

Utkarsh — Thu, 19 Jan 2012 22:07:35 +0000

I’ve not heard of this – and you should definitely not set it to 0 before releasing it. In fact, you shouldn’t release it. CvCapture maintains a single image in itself. All images retrieved are stored in this single image (one after the other). When you close the capture device, it automatically releases the image.

Comment on OpenCV Memory Management by Osman Eralp

Osman Eralp — Thu, 19 Jan 2012 22:01:14 +0000

I read that if an image is used for capturing from a webcam, you should set the image pointer to 0 before releasing the data, as shown below:

CvCapture* pCam1 = NULL;
IplImage* cam1CV = NULL;
…
cam1CV = cvQueryFrame(pCam1);
…
cam1CV=0; cvReleaseImage(&cam1CV);

If cam1CV is not set to 0, a runtime error occurs. Are you familiar with this technique, and do you know why it works?

Thanks!
Osman