Hey,

I'm pretty new to GEM and was wondering if there's a way to store the information(RGB and co-ordinate) about an image as a matrix/similar, to retrieve it at a later point.

My current method involves a rastering scanner that stores the information about the image in a big .mtx file.

Any insight would be appreciated!

pix_buffer?

I'm not really sure how to use pix_buffer if I am honest. I can't find any examples on the internet with still images either.

i'm searching for this too. You can save to tiff or jpg with pix_write, but i would like have the RGB plain in PD to send over TCP or UDP. An external that outputs a list with the bitmap plain instead a file would be awesone. I think the read/write is too slow and have too much acces disk for my patch.

i will look at the pix_write code, and i would like know where i can find information about the gemlist format, if anybody knows...

Regards.

Marvelous, thanks. Keep me posted on anything you find out!

I'm wanting the RGB values ideally in some kind of matrix. Finding that all conventional methods are either overloading Pd, or taking ages.

Regards.

If you are on linux or Mac, you might use 'import' from the ImageMagik library. It can snapshot windows, and I use it to take fotos of my GEM winder.

@sunji, I believe we're trying to extract the values of the pixels in some coordinates, as opposed to take a snapshot of the window.

Sidenote - do you think this can be done with pix, snap? Looks somewhat promising and I am currently investigating this.

@teedeejay: could you please elaborate a bit more what you are trying to do?

Hi,

i've do an external (pix2rgb) that outputs the data values of an image in a list in the second outlet. It's the first version working, i think to do something usable i would need one outlet more with the x and y information to regenerate the image, but if you know the size of the image it doesn't needed. The list is the raw data, so you need convert the image to RGB space before pix2rgb.

I've included the latest git version of Gem compiled. Compiled and working in Ubuntu Precise 12.04.
With the Gem version of Ubuntu repository gives an undefined symbol error and not loads.

Send me a message if you are trying it, please... In the next weeks i will improve it and upload the sources to some place.

This is fine to me. If not to you there is a function in Gem/image.h called GetRGB, that reads the RGB values of a pixel given x and y coordinates. Perhaps is more suitable to your needs, with pix2rgb you can track individual pixels manipulating the list with list split and unpack.

http://puremediaserver.googlecode.com/files/pix2rgb.tar.gz

I can't upload it here, perhaps it's too large for the forum engine