Augustine Bannatyne - Leudar

I want to make a picture sound converter. The four corners of the picture will be represented by four surround speakers. Colour will be mapped on to sound frequency.

how do I read the rgb for all the pixels on an image simoultaneously.

At the moment im using an lcd object but cant work out how to read the rgb/pixel position from it.....

I want to make a picture sound converter. The four corners of the picture will be represented by four surround speakers. Colour will be mapped on to sound frequency.
My problem is :

how do I read the rgb for all the pixels on an image simoultaneously.
At the moment im using an lcd object but cant work out how to read the rgb/pixel position from it.....

picture-sound-converter

what object allows me to read in a jpg/pict and output the rgb and grey scale values for each pixel ?

basically :
what object allows me to read in a jpg/pict and output the rgb and grey scale values for each pixel ?


jit.qt.movie is the obvious choice for reading a jpeg. To get a

cell's value as a max message, there is the matrix method getcell or

the object jit.iter. Might I suggest a run though the tutorials? I

jit.qt.movie is the obvious choice for reading a jpeg.  To get a
cell's value as a max message, there is the matrix method getcell or
the object jit.iter.  Might I suggest a run though the tutorials?  I
think this would be covered there.

> what object allows me to read in a jpg/pict and output the rgb and grey scale values for each pixel ?

There's no real way to do it without Jitter in Max.

gnee wrote:
> basically :
> what object allows me to read in a jpg/pict and output the rgb and grey scale values for each pixel ?

There's no real way to do it without Jitter in Max.


I'm amazed to see this post, i'm working exactly the same project at the moment! The project evolves from a project I produced last year involving colour frequency spectrum in relation to sound frequency and, you guessed it, four surround speakers. I called it the 'Surround Canvas' technique.

Would be interesting to hear about your progression.

Its for my third year module on the sonic arts course at middlesex, I have to make a user friendly pluggin.

It occurred to me other picture/sound converters I used were unsatisfactory. For one thing they are time based whereas a picture is perceived in an instant. Also using the y axis to define frequency seemed unsatisfactory to me as well, colour makes much more sense. Using surround sound should give a static "sound picture" (of course the logical progression for this idea is to have a speaker for each pixel heheh). 

What is more a picture is not represented in one dimension - aline -it is represented in two - a square - thus the four or more speakers.

On the whole it just seems more logical to represent with sound a picture in this way. Film of course changes over time and may be more compatable with music for this reason.

Anyway what did you use to read the pixels off ?

LOL ! Great minds eh ?
Its for my third year module on the sonic arts course at middlesex, I have to make a user friendly pluggin.
It occurred to me other picture/sound converters I used were unsatisfactory. For one thing they are time based whereas a picture is perceived in an instant. Also using the y axis to define frequency seemed unsatisfactory to me as well, colour makes much more sense. Using surround sound should give a static "sound picture"  (of course the logical progression for this idea is to have a speaker for each pixel heheh). 
What is more a picture is not represented in one dimension - aline -it is represented in two - a square - thus the four or more speakers.
 On the whole it just seems more logical to represent with sound a picture in this way. Film of course changes over time and may be more compatable with music for this reason.
Anyway what did you use to read the pixels off ?

Thanks for all the other replies - very useful !

Before Jitter I did something like that in Max reading data from a 

Before Jitter I did something like that in Max reading data from a  
raw pict file with "filein" object .
prehistoric but very economical cal
k


>> what object allows me to read in a jpg/pict and output the rgb and 

> There's no real way to do it without Jitter in Max.

There is a very real way to do this in max - LCD with the 'getpixel' message.

> gnee wrote:
>> basically :
>> what object allows me to read in a jpg/pict and output the rgb and 
>> grey scale values for each pixel ?
>
> Jitter.
>
> There's no real way to do it without Jitter in Max.

Of course you are right I should indeed go through the tutorials, and I will ! However I have to do this quite quickly and it takes time to get through all those tutorials to find just one tiny bit of information !

I tried as you suggested and it is perfect - it gives out the rgb for each pixel into ltocoll > coll. however how do I get the greyscale readings ?

Quote: wesley.hoke@gmail.com wrote on Fri, 24 February 2006 12:17

----------------------------------------------------

> jit.qt.movie is the obvious choice for reading a jpeg. To get a

> cell's value as a max message, there is the matrix method getcell or

> the object jit.iter. Might I suggest a run though the tutorials? I

Quote: wesley.hoke@gmail.com wrote on Fri, 24 February 2006 12:17
----------------------------------------------------
> jit.qt.movie is the obvious choice for reading a jpeg.  To get a
> cell's value as a max message, there is the matrix method getcell or
> the object jit.iter.  Might I suggest a run though the tutorials?  I
> think this would be covered there.
>
> best,
> wes
>
>
>
----------------------------------------------------


this may or may not be what you are looking for. if you improve it, it would be cool if you would pm it back to me.

Are you still using the forums. E-mail me when possible.

For any on interested the soution turned out to be using jit spill > and an rgb to hsl converter.

if you want to do this without jitter and you

know about picture formats you could open

anything as binary data using [filein] ...

if you want to do this without jitter and you
know about picture formats you could open
anything as binary data using [filein] ...


That might be an option for a future project if it makes thing more efficient cant be bad. The idea is to make a real time musical instrument.

Picture - sound converter