At least for now you can download the sample from my .mac site:
homepage.mac.com/mackey_mouse/FileSharing67.html
We hope to have it soon on the Apple developer site.
Frank
On Mar 27, 2008, at 11:20 AM, Robert Douglas wrote:
Hi Ian,
Did you get this resolved? I haven't bought (or seen) the book,
but I saw a demo at WWDC and I presume the code is similar to what
is in the book. Apple hasn't published it as a sample program yet
so I am still bound by the NDA and I can't just send you the
source. And as I don't have the book...
I've run CIColorTracking on several machines without any problem,
including my MacBook, so it should work fine on your MBP. And
yes the duck should follow the ball around.
I also tried implementing similar algorithms in Quartz-Composer by
writing my own kernels, but was not happy with the performance.
The Area Average filter is a bottleneck, and as I need to track
multiple points, I've gone back to doing everything on the CPU.
Is the Color Tracking Area Mean Filter version any better?
Cheers,
Rob
---
Dr. Robert M. Douglas,
Department of Ophthalmology and Visual Science,
University of British Columbia,
email@hidden email@hidden
http://www.cmr.ubc.ca/douglas.html
http://www.robertmdouglas.com
On 26-Mar-08, at 11:17 AM, Ian Grant wrote:
Dear all,
Sorry to bother you all with this one. It may not be completely
on topic:
I received GPU Gems 3 yesterday and tried out the CIColorTracking
example.
The nib in the sample code in GPU Gems 3 appears to be zero bytes.
Does anyone know of an errata page for GPU Gems 3 - I searched
but couldn't find?
I quickly constructed a new nib but seem to have an issue. I
assume the duck should follow the pink ball ;-).
Image: New Color Tracker Nib
<http://ellington.tvu.ac.uk/images/CIColorTracking001.png>
I am building on Leopard (10.5.2) on a mac book pro. I assume the
code is not nvidia specific. I even downloaded xcode 2.5 to see
if there were simpler issues with the NIB.
Also: I attempted to use the CI filter(s) in quartz composer, but
couldn't quite work out the logic. I guess I could be witnessing
the same problem exhibited in the application.
Image: Quartz Composer Patch using CI Color Tracker units
<http://ellington.tvu.ac.uk/images/QuartzComposer001.png>
The 'Color Tracking Area Mean Filter' outputs an image of bounds:
{{0,0},{1,1}} pixels.
I've also experimented by setting each CI filter to 'Use
Normalised Coordinates'.
Again, any hints or tips would be welcome.
Kind regards, Ian
*******************************
Ian Grant
Senior Lecturer in Digital Art
Faculty of the Arts
Thames Valley University
Ealing, UK
W5 5DX
<email@hidden>
*******************************
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Core Image
Apple Computer, Inc.
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