Cycling 74 » Topic: change matrix size of kinect depth map, faster to double? http://cycling74.com/forums/topic/change-matrix-size-of-kinect-depth-map-faster-to-double/feed Tue, 18 Jun 2013 20:55:50 +0000 http://bbpress.org/?v=2.2.4 http://cycling74.com/forums/topic/change-matrix-size-of-kinect-depth-map-faster-to-double/#post-60348 <![CDATA[change matrix size of kinect depth map, faster to double?]]> http://cycling74.com/forums/topic/change-matrix-size-of-kinect-depth-map-faster-to-double/#post-60348 Tue, 29 Nov 2011 21:07:21 +0000 prismspecs Hey all,
I’m basically trying to utilize the 640 x 480 depth map the kinect poops out with some video that is a higher resolution. If I feed the matrix through a larger matrix will it automatically scale it for me? Also, is it going to be faster for me to go from 640 x 480 -> 1024 x 768 or just double it entirely and go 1280 x 960? I’ve bumped it to 1024 and it dropped my frame rate by 10 or more :(

]]> http://cycling74.com/forums/topic/change-matrix-size-of-kinect-depth-map-faster-to-double/#post-217180 <![CDATA[Re: change matrix size of kinect depth map, faster to double?]]> http://cycling74.com/forums/topic/change-matrix-size-of-kinect-depth-map-faster-to-double/#post-217180 Tue, 29 Nov 2011 21:11:31 +0000 Wesley Smith If you’re doing this on the CPU, 1280 x 960 is a huge matrix to be processing. If possible, do any calculations on the GPU with slabs and shaders.

]]> http://cycling74.com/forums/topic/change-matrix-size-of-kinect-depth-map-faster-to-double/#post-217181 <![CDATA[Re: change matrix size of kinect depth map, faster to double?]]> http://cycling74.com/forums/topic/change-matrix-size-of-kinect-depth-map-faster-to-double/#post-217181 Tue, 29 Nov 2011 21:25:51 +0000 prismspecs I still have to load movies and the kinect into jit.matrix right? I’m not quite sure how much I can optimize what I have already. You’ve been insanely helpful with my project so far, Wes. Thank you. If you have time to look at my patch and point me in the right direction, I’m curious how I might be able to take some load off my CPU and put it on the video card.

– Pasted Max Patch, click to expand. –
]]> http://cycling74.com/forums/topic/change-matrix-size-of-kinect-depth-map-faster-to-double/#post-217182 <![CDATA[Re: change matrix size of kinect depth map, faster to double?]]> http://cycling74.com/forums/topic/change-matrix-size-of-kinect-depth-map-faster-to-double/#post-217182 Tue, 29 Nov 2011 22:02:20 +0000 Wesley Smith I see, you’re doing all of the cv stuff on a 1024 x 768 matrix. This is going to be slow. There’s no way around it without downsampling the matrix to a smaller dimension.

]]> http://cycling74.com/forums/topic/change-matrix-size-of-kinect-depth-map-faster-to-double/#post-217183 <![CDATA[Re: change matrix size of kinect depth map, faster to double?]]> http://cycling74.com/forums/topic/change-matrix-size-of-kinect-depth-map-faster-to-double/#post-217183 Tue, 29 Nov 2011 23:12:10 +0000 prismspecs Ah, so I could do all the operations on 640×480 and then upres w/ OpenGL shape drawing?

]]> http://cycling74.com/forums/topic/change-matrix-size-of-kinect-depth-map-faster-to-double/#post-217184 <![CDATA[Re: change matrix size of kinect depth map, faster to double?]]> http://cycling74.com/forums/topic/change-matrix-size-of-kinect-depth-map-faster-to-double/#post-217184 Wed, 30 Nov 2011 19:24:50 +0000 Rob Ramirez for blob tracking, you can probably go even lower than that.
i’ve had success with 80×60.
really depends on the specific scenario. fortunately it’s easy to change the dims on the fly.
try it out.

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