Could you please add some more intros in README?

[tclh123]

Thanks for your work, I'm learning AR now and the project may help me a lot.
But the codes is hard for me to understand.
I've run it, but I just see a camera video, nothing had detected(over the screen)?

[mkalmes]

Did you noticed the settings for ARVideo in the iOS Settings screen? Please make sure to enable your preferred level of details there.
Grid enables a yellow grid and Edgels (edge pixels) enables green/blue pixels on corners.

[tclh123]

Thanks for your reply.
Now I enable all the settings, and some debug lines appear this time. But it performs very low fps and can hardly find a marker(red line square).
Are there some problem with the code of debug lines? Or the algorithm have no good performance on iOS?
Ps. My device is iPad2.

[mkalmes]

ARVideo was build for iOS 4. Some changes related to OpenGL ES 1.1 and iOS 5 and later reduced the FPS down to ~4. This is a known issue.

I'll try to fix this issue in my spare time.

[tclh123]

Hey mkalmes,
I spent some time to build an Augmented Reality Application for myself, using the Hizer's Algorithm too. Finally it does work, but low fps.
And I think your application may have some bugs with opengl or some rendering things.

[mkalmes]

And I think your application may have some bugs with opengl or some rendering things.

That's true. I've opened issue #2 to address the problem.