Comments on: Inside FLARManager: Customization

By: alvin

alvin — Tue, 20 Sep 2011 00:20:10 +0000

hi,

can I ask something about on how to compile the tarotaro’s marker generator?

By: ericsoco

ericsoco — Mon, 04 Apr 2011 16:24:21 +0000

@blue — i have more to say on this thread, but might be best to continue this conversation on the FLARManager forum. i’m trying to phase out my blog as a place for q&a, it’s just too messy.

please repost the thread to-date there and i’ll follow up.

By: blue

blue — Mon, 04 Apr 2011 03:49:24 +0000

Hi Eric,

Thanks for the reply. Yes, we are planning to use all 5000 in one application. We have since lowered it down to 1500. Will this still be an issue? Also, I was examining your flar markers and your pat files. Your pat files only contains the numbers 0 and 255. I think this is the reason it reads so well when using it. Question is, how did you generate your png’s? I tried using illustrator but it is still not as crisp as yours.

By: ericsoco

ericsoco — Tue, 29 Mar 2011 22:15:43 +0000

@Emil — DHTA calculates bias on its own, based on the current histogram of the video feed. DrunkWalkThresholdAdapter allows you to manually set the bias; if you want to do that, use DWTA instead of DHTA.

By: Emil

Emil — Tue, 29 Mar 2011 08:36:25 +0000

Hi Eric!

First of all – thanks for you fantastic effort in the AR community!

I have a question. I’m running a Flar Manager AR app in a pretty bright room. How exactly do I change the value in DrunkHistogramThresholdAdapter.calculateBias() so it better suits my needs? I’m looking at the function in DrunkHistogramThresholdAdapter.as but don’t know which values to tweak. Or am I looking in the wrong place?

Many thanx!

By: ericsoco

ericsoco — Fri, 25 Mar 2011 21:39:52 +0000

@blue — i don’t know a better way, but you could write your own program to generate .pat files from .png files, wouldn’t be that difficult.
is this 5000 patterns for one FLARManager/Toolkit application? if so, you’re going to run into trouble; FLARToolkit won’t be able to handle that many markers.

By: blue

blue — Thu, 24 Mar 2011 20:46:54 +0000

We are doing an installation… and we need to convert 5000 FLAR png files to .pat format. Is there any other way to do this other than tarotaro’s online generator? Any help would be greatly appreciated.

By: Ram

Ram — Thu, 11 Nov 2010 10:25:34 +0000

Marker detection problems:
I have a set of markers which get detected fine and the models appear over it but at times when I bring my hand or other objects into the camera’s field of view, the models seem to appear in a disoriented fashion..( which should not be the case ).. Has anyone faced such an issue…. My custom marker has curved shapes in it…( probably that could be the reason..

Could anyone point me to marker design guidelines… ( I have seen the custom marker creation guidelines in this site but it does not talk about the design aspect )

Thanks,
Ram

By: thirdrow

thirdrow — Tue, 30 Mar 2010 13:25:14 +0000

so….based on Lee’s tutorial for FLARManager, he adds the FLARManager, under the initFLAR function and then adds the child to a Sprite object – I’ve tried:
fm.flarSource, Sprite.fm.flarSource, flarSource, and flarManager.flarSource with the .x=10; and as you know, none of that works.

I am totally new to this stuff, having never worked in Flex or even AS to this level, but I’ve managed to get this working where I’m just using the markers as a trigger to play videos that I’m adding onto the stage (think tour videos of college labs based on whether they are new or returning students) so I’m not adding any 3D objects as of yet.

Thank you for your response – this is really important work that you are doing.

By: ericsoco

ericsoco — Tue, 30 Mar 2010 05:12:11 +0000

@thirdrow — FLARManager does not extend DisplayObject. you want to use flarManager.flarSource instead. be sure you also set the position of the container of your objects drawn over the markers (e.g. your papervision Scene3D) accordingly.