Generate Gray code

[Dalia Nada]

Is there a open source code to generate gray code pattern ( 20 frames
maximum) using matlab ??????

[Elliot Woods]

generating graycode isn't mathematically very difficult

do you want to store it in a 768x1024x20 matrix?

or is it enough just to have the binary values in a 768x1024 matrix?

I can't remember much about matlab to be honest

you can see how to render the graycode values at:

https://github.com/elliotwoods/ofxGraycode/blob/master/src/Payload.cpp#L123 

that'll give you a 1024*768 array of integers

then for each frame, you should trasmit a bit for each frame

this is performed at

https://github.com/elliotwoods/ofxGraycode/blob/master/src/Payload.cpp#L71

but you can code this in a way that makes more sense to you

for (int i=0; i<size; i++)
	*pixel++ = (*data++ & (uint)1 << frame) == (uint)1 << frame ? (uchar)255 : (uchar)0;

means for each pixel, get the integer for that pixel

then select the bit for this frame (bitshift 1 by frame, [&] this value against the int, check whether equals 1 bitshift by frame)

the output is then converted to 255 (full brightness) or 0

elliot

On 13 February 2012 22:58, Dalia Nada <dalia...@gmail.com> wrote:

Is there a open source code to generate gray code pattern ( 20 frames
maximum)  using matlab ??????

--

Elliot

-- 
Elliot Woods
elliot@KimchiAndChips.com