Comments for CODING BETA http://www.codingbeta.com Coding tips, tools, and solutions Sun, 06 May 2012 15:17:50 +0000 hourly 1 http://wordpress.org/?v=3.3.2 Comment on Drastically Improved Version of Headshot Released! by The Story of Headshot | CODING BETA http://www.codingbeta.com/?p=259#comment-1333 The Story of Headshot | CODING BETA Sun, 06 May 2012 15:17:50 +0000 http://www.codingbeta.com/?p=259#comment-1333 [...] releasing an improved version of headshot today (see this post) and in light of this I wanted to tell everybody how Headshot came to be, and what I’ve learned [...] [...] releasing an improved version of headshot today (see this post) and in light of this I wanted to tell everybody how Headshot came to be, and what I’ve learned [...]

]]> Comment on 3 Pro Tips for Surviving Red Eye Flights by Chloe Fan http://www.codingbeta.com/?p=246#comment-1294 Chloe Fan Tue, 10 Apr 2012 00:01:55 +0000 http://www.codingbeta.com/?p=246#comment-1294 Definitely earplugs and eye masks. I haven't yet found a pillow that worked well and is small enough (only bringing one backpack limits my storage space). Being small helps because then you can curl up in your seat. Definitely earplugs and eye masks. I haven’t yet found a pillow that worked well and is small enough (only bringing one backpack limits my storage space). Being small helps because then you can curl up in your seat.

]]> Comment on 3 Pro Tips for Surviving Red Eye Flights by Ling http://www.codingbeta.com/?p=246#comment-1293 Ling Mon, 09 Apr 2012 22:29:12 +0000 http://www.codingbeta.com/?p=246#comment-1293 I've never done red eye, but I did enough intl' flight. I found headphones and proper music helps a lot. I’ve never done red eye, but I did enough intl’ flight. I found headphones and proper music helps a lot.

]]> Comment on 3 Pro Tips for Surviving Red Eye Flights by Lydia http://www.codingbeta.com/?p=246#comment-1292 Lydia Mon, 09 Apr 2012 21:49:59 +0000 http://www.codingbeta.com/?p=246#comment-1292 I also take an over the counter sleep-aid called Melatonin to help me get to sleep, especially on red-eyes where I never quite feel comfortable enough to fall asleep on my own. After years and years of insisting that I didn't want to go the sleep-aid route, I tried this and it dramatically changed my quality of life for the better. I also take an over the counter sleep-aid called Melatonin to help me get to sleep, especially on red-eyes where I never quite feel comfortable enough to fall asleep on my own. After years and years of insisting that I didn’t want to go the sleep-aid route, I tried this and it dramatically changed my quality of life for the better.

]]> Comment on Finally, Face Detection for Windows Phone! by admin http://www.codingbeta.com/?p=204#comment-1286 admin Wed, 04 Apr 2012 15:46:12 +0000 http://www.codingbeta.com/?p=204#comment-1286 Vyacheslav, I'm getting the following (units is ms): unoptimzed--1200 on phone, 324 on computer optimized-- 820 on phone, 186 on computer I realized that my timing on the sample code was wrong, I was counting also the time it takes to get a new frame which is why latency was high. When calculating only time to detect faces (not pre-processing), detection is around 100 ms. When calculating pre-processing, detection it was originally 200 ms (!), and then I realized I had super inefficient code (processing data that was not downsampled). After fixing this inefficiency the sample detection time (including downsampling) is down to 100 ms!!! Thanks for your help, you helped reduce the delay in my sample by 2x :) I still feel like it can be better, feel like detection time should be around 30 ms. Any other ideas. Vyacheslav, I’m getting the following (units is ms):

unoptimzed–1200 on phone, 324 on computer
optimized– 820 on phone, 186 on computer

I realized that my timing on the sample code was wrong, I was counting also the time it takes to get a new frame which is why latency was high. When calculating only time to detect faces (not pre-processing), detection is around 100 ms. When calculating pre-processing, detection it was originally 200 ms (!), and then I realized I had super inefficient code (processing data that was not downsampled). After fixing this inefficiency the sample detection time (including downsampling) is down to 100 ms!!!

Thanks for your help, you helped reduce the delay in my sample by 2x :) I still feel like it can be better, feel like detection time should be around 30 ms. Any other ideas.

]]> Comment on Finally, Face Detection for Windows Phone! by Vyacheslav http://www.codingbeta.com/?p=204#comment-1276 Vyacheslav Thu, 29 Mar 2012 03:56:32 +0000 http://www.codingbeta.com/?p=204#comment-1276 Shared there: http://files.mail.ru/9I6L9O click on "face_detection_toshare.zip" archive contains two solutions: 1) without optimization (900 msec) 2) with int[][] optimization (450 msec) CameraMainApp is a startup project. Please let me know about your results. Shared there:
http://files.mail.ru/9I6L9O

click on “face_detection_toshare.zip”
archive contains two solutions:
1) without optimization (900 msec)
2) with int[][] optimization (450 msec)
CameraMainApp is a startup project. Please let me know about your results.

]]> Comment on Finally, Face Detection for Windows Phone! by admin http://www.codingbeta.com/?p=204#comment-1273 admin Wed, 28 Mar 2012 14:31:06 +0000 http://www.codingbeta.com/?p=204#comment-1273 Oh wow I never had such high latency. My latency is currently at 250ms - 350ms for the sample (after the black and white image rendering is removed). So, perhaps my phone (Samsung Focus) runs faster. Sure, sharing on the web sounds good. Oh wow I never had such high latency. My latency is currently at 250ms – 350ms for the sample (after the black and white image rendering is removed). So, perhaps my phone (Samsung Focus) runs faster. Sure, sharing on the web sounds good.

]]> Comment on Finally, Face Detection for Windows Phone! by Vyacheslav http://www.codingbeta.com/?p=204#comment-1272 Vyacheslav Wed, 28 Mar 2012 08:55:40 +0000 http://www.codingbeta.com/?p=204#comment-1272 Hmmm... I'm using Samsung Omnia W. The program compiled by Visual Studio 2010 Express for Windows Phone in Release configuration. I've implemented few optimizations like 1) change int[,] to int[][] 2) change type of RectFeature.weight from float to int 3) change type of 'scale' to int and I stably see latency down from ~900 msec to ~450 msec with all optimization. I want to realize why you does not find any latency reduces. Because I does not know your email, I can't send all solutions (without\with optimization) to you. But I able to share it on web. This makes sense, do you think? Hmmm… I’m using Samsung Omnia W. The program compiled by Visual Studio 2010 Express for Windows Phone in Release configuration.
I’ve implemented few optimizations like
1) change int[,] to int[][]
2) change type of RectFeature.weight from float to int
3) change type of ‘scale’ to int
and I stably see latency down from ~900 msec to ~450 msec with all optimization.
I want to realize why you does not find any latency reduces.
Because I does not know your email, I can’t send all solutions (without\with optimization) to you. But I able to share it on web. This makes sense, do you think?

]]> Comment on Finally, Face Detection for Windows Phone! by admin http://www.codingbeta.com/?p=204#comment-1271 admin Wed, 28 Mar 2012 03:57:28 +0000 http://www.codingbeta.com/?p=204#comment-1271 Hi Elisa, Just wanted to let you know I fixed the bug that was causing those parse errors and have comitted the code and made a new beta release. Hope this helps you! Hi Elisa,
Just wanted to let you know I fixed the bug that was causing those parse errors and have comitted the code and made a new beta release. Hope this helps you!

]]> Comment on Finally, Face Detection for Windows Phone! by admin http://www.codingbeta.com/?p=204#comment-1270 admin Wed, 28 Mar 2012 03:54:21 +0000 http://www.codingbeta.com/?p=204#comment-1270 Clive, yes the issue was due to localization, and I have finally fixed this (after way too much debugging, can't believe I missed this post!). The issue should be fixed and you should be able to use the phone in Finnish regardless I think. Clive, yes the issue was due to localization, and I have finally fixed this (after way too much debugging, can’t believe I missed this post!). The issue should be fixed and you should be able to use the phone in Finnish regardless I think.

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