yeah baby… that shit is FAST!..

great job alex… please, please pretty please share your touchlib binaries.
I have a similar setup (firefly MV etc..)…

thanks..

ps.. you can buy firefly MVs seperately, but you will be forced to buy a “dev kit” for 100 $, which contains some
adapters, ptgrey API and a pci firewire card, plus another 100$ shipping… so if you only need one, its 399$ all
together, which simply sucks!

One more thing, Alex. How are you getting 100+ fps with the FireflyMV? Region Of Interest?

If so, how did you get ROI to work with Touchlib?

Keep up the great work, btw.

Your set up is awesome!!!!!!!!!!!!!!!!!!!!!!!!!!
I’ll have to look into the Dual IR Laser.
Keep up the great work

yeah you can adjust the roi when using touchlib.. in the properties window (format 7)…
at least thats how I tried it once…

GFantini - 16 June 2008 12:58 PM

One more thing, Alex. How are you getting 100+ fps with the FireflyMV? Region Of Interest?

If so, how did you get ROI to work with Touchlib?

Keep up the great work, btw.

Yes in the camera config dialog under ‘Format 7’, I setup the ROI as follows:
x: 216 w: 320
y: 120 h: 240

~Alex

No luck. I can manage to configure the custom resolution, but then I get a “Sizes of input arguments do not match in function cvCopy...” message.

Maybe it’s because I’m not using PGR’s own drivers, because they don’t work with Touchlib in Vista x64. I’m using Unibrain’s generic DirectShow drivers.

But thanks.

Alex, that’s awesome work! Amazingly smooth and reliable tracking. I see posts about lasers helping the speed, I’m not sure how it helps the speed, something tells me it’s more of that firefly cam and touchlib mod. Some description of your modification would be great

scape, you’re right the laser approach doesn’t directly cause a speed increase. But if you look at the images AlexP has uploaded you can see that the blobs being produced are very clear and precise, so I can’t help but think that they are easier for the system to identify and track.

good point. do you know if the laser light has a depth bleed like DI sometimes can? I mean where the light may light up the fingers before touchdown onto the surface? or is this solely frontal illumination?

Alex described it as low pressure , when your fingers just barely touch the laser , that’s mid-air , no surface touching.

scape - 17 June 2008 12:17 PM

good point. do you know if the laser light has a depth bleed like DI sometimes can? I mean where the light may light up the fingers before touchdown onto the surface? or is this solely frontal illumination?

By adjusting both laser beam thickness (laser light focus) and the laser light plane distance from the acrylic, you can make it so that the blobs are not visible until you physically touch the acrylic. So therefore with LLP method there are no depth bleed problems that DI has, in that regard the LLP method is more similar to FTIR.

~Alex

Congratz on your successful works Alex

hey alex can i use you setup with Xbox live camra or i have to get the same camra you have?

@ giggs: you can use the xbox live camera with a setup like Alexs’, but you wont get the frame rate he’s getting you’ll probably get around 30fps @ 640x400 or 60fps @ 320x200, by using the xbox 360 camera

Taha

Giggs - 18 June 2008 02:13 PM

hey alex can i use you setup with Xbox live camra or i have to get the same camra you have?

Giggs, you can use Xbox live camera. As you can see from my other post, I used my old iBot camera with success and also in the past I used SPC900 cam.
The reason I went with the Firefly MV is that I tried to improve performance (latency and smoothness of blob tracking) of my setup.

~Alex