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2015-04-30 03:52:28 -0600 | commented question | How Many Images for Camera Calibration? Have a look at these blogs, which is really useful for stereo calibration. http://blog.martinperis.com/2011/08/s... http://blog.martinperis.com/2011/01/o... Number of images and orientation of chess board being captured matters a lot. It is recommended to capture as many as 30 to 40 images in different orientation and different distance to make calibration best. |
2015-04-28 02:25:10 -0600 | commented question | background substraction and camera electronics Yes, you are exactly right. This is due to auto gain and auto exposure property of camera. Try disabling AEC and AEC using some camera viewer application like amcap (windows) or cheese (linux) and try experimenting with different manual gain and exposure values suitable for your environment. Eager to see your results:-) |
2015-04-28 02:20:34 -0600 | commented question | How to improve blob detection rate? You can try out k-means segmentation. Here are few links, http://www.pyimagesearch.com/2014/05/... http://www.bogotobogo.com/python/Open... |
2015-04-28 02:15:57 -0600 | commented question | Android - How to display image/animation over camera? Here are few supporting links for your question. http://xanthippi.ceid.upatras.gr/peop... http://www.jera.com/jbrewer/2014/01/c... - But with iOS |
2015-04-28 01:27:39 -0600 | commented question | Spotter Needed! Here are few links that would help you to start your work. http://stackoverflow.com/questions/19... http://www.youtube.com/watch?v=OMrgLp... |
2015-04-28 01:11:12 -0600 | answered a question | Is HSV supposed to look extremely blotchy in opencv? Yes, as kbarni said, this is expected due to the behavior of CCD and CMOS sensors. There will be considerable amount of noise being added to image (even though you don't wish for). Here is the synthesized color sample shape image And their hue channel image In this synth image, there wont be any patches. Hope you are clear now. |
2015-04-28 00:44:24 -0600 | commented question | Template matching giving incorrect location It would be better to understand your issue if you post some sample images and results. |
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2015-03-24 03:41:13 -0600 | commented question | please help-no errors but nor output... @sandun: Please read http://answers.opencv.org/faq/ before posting your questions. It looks like you dint get any output as you did not specified any argument to your application. argv is empty in your case, so imread fails and hence condition of src.empty satisfies. Put some messages in your code to debug where it break out. |
2015-03-24 03:39:24 -0600 | commented question | Set frame resolution problem Try using Amcap and see whether you are able to switch resolution with that application. If that works, then resolution switching should work with OpenCV as well. Link to download http://amcap-webcam-capture.en.lo4d.com/ |
2015-03-24 01:20:59 -0600 | answered a question | Unable to open raw image through opencv Following code snippet would help to load raw image to OpenCV Mat structure and then you can do further processing like demosaicing or some detection algorithms. Once color space is converted to BGR, further processing like edge detection or enhancement can be done. Hope this helps. |
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2015-03-24 00:00:06 -0600 | commented question | Background color similar to object color - How isolate it? Preprocessing of underwater images is explained in this paper - https://www.ensta-bretagne.fr/jaulin/paper_bazeille_CMM06.pdf |
2015-03-23 05:53:17 -0600 | commented question | Auto Cropping after bitwise application @zms: Share your input image as well. |
2015-03-23 05:48:30 -0600 | commented question | OpenCV Assertion Failed with Stitcher Keep breakpoints in Visual studio and find which function creates assertion. Do some debugging on variable and its value. Then post your questions, so that others will know you have worked something and really need help. |
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2015-03-23 05:46:07 -0600 | commented question | i need code to pass a line at the centre center of two curved lines @creative, mark answers if it was helpful |
2015-03-23 05:45:46 -0600 | commented question | reading a sequence of files within a folder @KansaiRobot, mark answers if it was helpful |
2015-03-23 05:44:41 -0600 | commented question | How to find out image format retrieved via VideoCapture ? @ganesh17, mark answers if it was helpful |
2015-03-23 05:44:21 -0600 | commented question | How to find out image format retrieved via VideoCapture ? As berak said, it is always 24 BPP format. It can either be 8-bit gray scale with padded 16 bit or can also be BGR color data. Depends on data stored in the video. |
2015-03-23 05:39:51 -0600 | answered a question | reading a sequence of files within a folder You can refer to OpenCV samples. Many samples use this such concept. Here is one from \opencv\sources\samples\cpp\stereo_calib.cpp.
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2015-03-23 01:03:22 -0600 | answered a question | i need code to pass a line at the centre center of two curved lines Assuming you have two curved lines running parallel to each other in your image, here is a suggestion to get the mid point between curved line.
Share your results with image samples. |
2015-03-20 09:24:25 -0600 | commented question | Shape matching using fourier descriptor - Frequency domain @juanmanpr: Shape context in OpenCV 3.0 works well with their samples. But produces poor result with image attached in my original post. The distance value calculated by Shape context is high for same type of object, but low for different object, and varies with same object. |
2015-03-19 00:39:21 -0600 | commented question | i need code to pass a line at the centre center of two curved lines Refer to http://stackoverflow.com/questions/14... for finding edges of arc, organize coordinates forming arc in a vector either clock wise or anticlockwise order.. find mid value of vector, which would be the center of arc. |
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2015-03-17 03:36:08 -0600 | commented question | Shape matching using fourier descriptor - Frequency domain Looks promising, will try and update you the result of Shape context in OpenCV 3.0. |
2015-03-17 03:35:37 -0600 | commented answer | Shape matching using fourier descriptor - Frequency domain Yeah, number of points chosen plays very important role in matching. But for now I am using all the descriptor points (say, 625, 535 points for few object). I find minimum of two contours and match those points by finding distance between them. |
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2015-03-09 09:36:10 -0600 | asked a question | Shape matching using fourier descriptor - Frequency domain Hey algorithm enthusiast, Here is an implementation I am trying to make it work for shape matching that is invariant to rotation, translation and scaling as per theory. Reference Links
What is the process that I tried
Stuck up with The Euclidean distance calculated is coming same/closer for any test sample I give. Not sure where I do mistake. I do not find any sample implementation for frequency domain shape matching. Please help in understanding any mistakes that is being done. Sample image in recognition EDIT: I am trying to perform rotation, scale and translation invariant shape matching using Fourier descriptor as proved in technical papers. I am making use of OpenCV 2.4.9 on Windows. |
2015-03-09 03:17:29 -0600 | commented question | can anybody please help me how to count our face in face detection Could you elaborate your task and edit you question? Do you want to count number of faces in a scene? or Do you want to count occurrence of your face from a video of specific duration? Be detail while posting question in order to provide better replies. |
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