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2014-12-09 13:52:14 -0600 | marked best answer | How to intuitively interpret Gabor lambda param? I am playing with the newly added Gabor filters. I know some basics about them, and how they are used for recognition tasks. But I have troubles understanding in an intuitive way (not by writing complicated math formulas) what is the meaning of the lambda parameter. Here is the formula, from Wiki: And here are some pictures, where I varied lambda:
The other parameters are as follows: |
2014-12-09 13:45:14 -0600 | marked best answer | test NEON-optimized cv::threshold() on mobile device I have been writing some optimizations for the OpenCV's threshold function, for ARM devices (mobile phones). It should be working on both Android and iPhone. However, I do not have a device to test it on, so I am looking for volunteers to give me a little help. If that motivates you more, I am planning to push it to the main OpenCV repo - and hope you guys will accept it I am interested in code correctness, and if it happens to work as intended, some statistics for original/optimized performance. Do not forget to look at all scenarios. If this patch format is a nonsense for you, the post here may help you more Edit I forgot to mention that you have to activate it by adding Patch 1/3. Update checkHardwareSupport() Patch 2/3. threshold() optimizations (more) |
2014-12-09 13:43:04 -0600 | marked best answer | Bug in the answers site (I tried to use the feedack form, but it doesn't seem to work. If this is redundant, please let me know, and I will delete it. And I think it would be better for you to delete it after you acknowledge the problem, because it doesn't belong here) I think a feature of the software that runs this answers site is actually a bug - It seems that if one's answer gets accepted, you receive 15 pts. So far, OK, But if the OP changes the accepted answer to another, it only takes out 5 pts from your karma. It may seem logical to keep some of the karma, because at a given moment in time, the answer seemed to be perfect. But the trouble starts when you switch accepted answer multiple times - every time it happens, you add (15-5=10pts). You can see it here, on my profile http://answers.opencv.org/users/197/sammy/?sort=reputation 15 0How to enable vectorization in OpenCV? (6 mins ago) (Accepted again. 15pts again!!!) 10 0How to enable vectorization in OpenCV? (6 mins ago) (An upvote) 0 -5 How to enable vectorization in OpenCV? (16 mins ago) (Dis-accepted. Still keep 10 pts) 15 0How to enable vectorization in OpenCV? (16 mins ago) (Got accepted. 15pts ) 10 0How to enable vectorization in OpenCV? (16 mins ago) (Upvote) |
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2013-12-04 09:09:47 -0600 | commented answer | Convert between depth values and depth types This is not a forum - to discuss based on a question. There is only one question per topic - opened by the first poster, and multiple answers |
2013-12-04 09:08:25 -0600 | commented question | Using OpenCV to detect product availability on a shelf The previous answer was deleted as self-advertising, contrary to forum rules |
2013-12-04 09:07:24 -0600 | commented answer | Using OpenCV to detect product availability on a shelf Will be deleted as self-advertisment |
2013-11-28 19:16:09 -0600 | marked best answer | How to use the LshIndexParams? I want to try out the new matching algorithm in flann, with LSH. But there is no info available. What is the significance of the parameters in the Also, can you suggest some default values to start with? For a better context, I want to replace the I would also want to know whether I should instantiate the matcher with a custom Edit I have tried to set the parameters recommended by docs (and some random combinations): but it throws an error inside miniflann : |
2013-10-31 02:04:39 -0600 | commented question | Unfortunatly, OCV Face Detection has stopped. Looks like an unfortunate problem... |
2013-08-26 06:22:52 -0600 | commented answer | ELSE runs even after IF runs! @sinaras If your code goes on the |
2013-08-26 04:19:57 -0600 | commented question | type and size of calibration pattern for most accurate results The guys that wrote those calibration algorithms say that circles are far more accurate. But I cannot remember where they wrote that - I think in the Weekly Meeting Notes. |
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2013-07-08 00:37:06 -0600 | commented question | Augmented Reality Your project is not impossible. However, for the same reason students don't build rockets, space ships or car engines from scratch during their summer assignments, it will be quite difficult for you to accomplish the task. I think a wise thing to do is to scale down your project to something manageable, and complete it, than to dream of something for which you would need a team of scientists and a 1 million $. Something I think can be done is to perfect the barcode scanning, and to build a little web app that tries to get info about that part - a technical spec, or whatever. Good luck! |
2013-06-27 09:59:00 -0600 | commented question | How to generate unique face id for detected face from image ? Read some papers on face recognition, and you'll have an idea on where to start. Just that it's not going to be a few lines of code, neither a magical |