Hi,
I am a puredata user (www.puredata.info), I am trying to embed
ARToolKitPlus into Gem (a pd graphical plugin). 

Here is what I've done so far: 
http://www.davidemorelli.it/dokuwiki/doku.php?id=ar:artoolkitplus

I am having problems recognizing markers.

I am sure Gem gives images to atkp in RGBA format but atkp won't find
any marker.
It is in the form of an array of unsigned chars (RGBARGBA....), is it
ok?

Is there any example code of using RGBA images? ...maybe I'm doing
something really stupid...

Thanks,
Davide.

Hi Davide,

Something else you could consider is using ARToolKit to get the image
as well as doing the detection, and sending UDP packets with detected
marker information to localhost to be received by Pd's [netreceive]. If
you're interested in doing it that way check out the code here:

http://mccormick.cx/dev/argraf/

The files in the root directory build a little program called 'arudp'.
You could just add a semicolon to the packets sent in order to read them
with [netreceive].

Good luck!

Best,

Chris.

On Wed, Mar 01, 2006 at 12:41:53AM +0100, davide wrote:
> Hi,
> I am a puredata user (www.puredata.info), I am trying to embed
> ARToolKitPlus into Gem (a pd graphical plugin). 
> 
> Here is what I've done so far: 
> http://www.davidemorelli.it/dokuwiki/doku.php?id=ar:artoolkitplus
> 
> I am having problems recognizing markers.
> 
> I am sure Gem gives images to atkp in RGBA format but atkp won't find
> any marker.
> It is in the form of an array of unsigned chars (RGBARGBA....), is it
> ok?
> 
> Is there any example code of using RGBA images? ...maybe I'm doing
> something really stupid...
> 
> Thanks,
> Davide.
> 
> 
-------------------
chris@m ...........
http://mccormick.cx

HI Davide,

If you have an analog video mixer as a separate box. A really quick & dirty
approach would be to use Chris's thing to send the transformation data via a
socket to PD, then make your GEM scene with a blue or green background. By
using an analog video mixer, you can take some of the processing load off
your computer. The downside is that you need to use an analog camera and
split the video with a distribution amp. Also, because there is zero latency
in the compositing, you really notice the latency in the tracking :)

Rod.


Rodney Berry
ATR Media Information Science Laboratories
Kyoto Japan
Mail:
http://xinbox.com/rodberry?subject=response%20from%20signature%20address
Homepage: 	http://www.mis.atr.jp/~rodney
Ph:   +81-774-95-1449
Fax:  +81-774-95-1408

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



-----Original Message-----
From: owner-artoolkit@h ..................
[mailto:owner-artoolkit@h ..................] On Behalf Of Chris McCormick
Sent: Wednesday, March 01, 2006 11:23 AM
To: davide
Cc: artoolkit@h ..................
Subject: Re: ARToolKitPlus images format

Hi Davide,

Something else you could consider is using ARToolKit to get the image as
well as doing the detection, and sending UDP packets with detected marker
information to localhost to be received by Pd's [netreceive]. If you're
interested in doing it that way check out the code here:

http://mccormick.cx/dev/argraf/

The files in the root directory build a little program called 'arudp'.
You could just add a semicolon to the packets sent in order to read them
with [netreceive].

Good luck!

Best,

Chris.

On Wed, Mar 01, 2006 at 12:41:53AM +0100, davide wrote:
> Hi,
> I am a puredata user (www.puredata.info), I am trying to embed 
> ARToolKitPlus into Gem (a pd graphical plugin).
> 
> Here is what I've done so far: 
> http://www.davidemorelli.it/dokuwiki/doku.php?id=ar:artoolkitplus
> 
> I am having problems recognizing markers.
> 
> I am sure Gem gives images to atkp in RGBA format but atkp won't find 
> any marker.
> It is in the form of an array of unsigned chars (RGBARGBA....), is it 
> ok?
> 
> Is there any example code of using RGBA images? ...maybe I'm doing 
> something really stupid...
> 
> Thanks,
> Davide.
> 
> 
-------------------
chris@m ...........
http://mccormick.cx

davide wrote:

>Is there any example code of using RGBA images? ...maybe I'm doing
>something really stupid...
>  
>
hi Davide,

the RGBA support in ARToolKitPlus is basically the same as in ARToolKit.
i just confirmed that it works fine doing this with the simple example
that come with ARToolKitPlus 2.0.1:
- open image_320_240_8_marker_id_simple_nr321.png in Photoshop
- add another channel
- save as RAW named image_320_240_32_marker_id_simple_nr031.raw
- make sure that all 4 channels were saved, filesize should 307.200 bytes
- im main.cpp:
- change bpp from 1 to 4
- change image_320_240_8_marker_id_simple_nr031.raw to
image_320_240_32_marker_id_simple_nr031.raw
- change PIXEL_FORMAT_LUM to PIXEL_FORMAT_RGBA

that's it...

Daniel