Forums > MaxMSP

dividing a matrix for variable slit scan


Linden
January 25, 2012 | 10:18 pm

Hello

I am experimenting with slit scan techniques found in the forum and from other examples. i wanna achieve something similar to this:

http://www.youtube.com/watch?feature=player_embedded&v=csSDpzXwvRI

How can you write two different things in one jitter matrix? Like a live view and the slit scan image? when you use jit.scissors and glue pairs it is kind of a workaround but as in this video i want to use a flexible scanline…

what about the framerate when it comes to higher reslutions?
this iphoneapp seems to handle a max resoltion of 2048×640 which leads my patch to a framerate to around ten.

in my patch i use this video stream:
cam input – jit.matrixset – jit.submatrix – jit.matrix. i actually dont get why leaving the jit.matrixset out leads to a slower framerate.
any help and ideas appreciated!

here is my patch so far:

– Pasted Max Patch, click to expand. –

Tobias Rosenberger
January 26, 2012 | 9:15 am

You could send your effect-image send to one jit.gl.videoplane and the live view to another jit.gl.videoplane that share one common render-context, so that the 2 planes are just arranged next each other (and you can dynamically resize the 2 videoplanes then.
Regarding speed: Did you try to make the scanline > 1? Maybe you can try to scan f.e. 5 or 10? then you don’t have to count so many steps and I think image should still look smooth…

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