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2015-03-31 14:25:54 -0600 | commented question | What is a stage in cascade/haar training |
2014-05-26 06:17:04 -0600 | commented question | BackgroundSubstract @Junglee What is your application about, what is your goal? How long did you wait for it to disappear? |
2014-05-23 19:13:32 -0600 | received badge | ● Citizen Patrol (source) |
2014-05-23 12:09:43 -0600 | commented question | BackgroundSubstract You probably need to wait until the background model adapts to the new appearance there. Or you may want to use a different background modeling approach. Perhaps a simple thresholded absolute difference with an empty scene is enough. |
2014-05-23 12:05:57 -0600 | answered a question | How do I capture, process and output an image in RGB (not BGR)?
Disclaimer: I only have experience with OpenCV on desktop. |
2014-05-23 11:59:43 -0600 | answered a question | Eliminating small blobs leaving bigger ones intact Connected Component Labeling may be a good solution here. Take a look at this implementation. |
2014-05-23 11:51:00 -0600 | commented question | Difference of frame size and cv::Mat size Maybe the video is compressed? |
2014-05-16 17:04:40 -0600 | commented question | Undistortion of image returns nothing I don't know the solution but why don't you write a function instead of copying code and suffixing variable names? Also in the line |
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2014-05-13 12:06:17 -0600 | answered a question | How to cut an image in small images with opencv !!! You can extract rectangular regions from a Mat.
Note that this will not copy the image data, it just creates another wrapper to the same image data. If you need data copy, use Now if you need to extract multiple such image parts, essentially slicing your image with a grid, you can create a for loop as follows. Here I assumed that the size of the bigImage is an integer multiple of the size of the desired small images. |
2014-05-13 05:43:46 -0600 | commented question | Calc Grain of Image? (Difference between two Pictures) This is a texture problem. There are many texture descriptors that could be used here. It really depends on what the percentage should represent and what you want to do with it later. Maybe the simple approach of calculating the contrast of the image or the variance of the pixel values or the gradient strengths could work. |
2014-05-13 05:34:44 -0600 | commented question | double to mat Mat can contain doubles as matrix elements. Google for OpenCV Basic Structures and you will find a page about Mat. Do you already have another double matrix class that you are trying to convert to Mat? Please be more specific. You are more likely to find help if you ask in a clear way. |
2014-05-13 05:29:03 -0600 | received badge | ● Editor (source) |
2014-05-13 05:25:34 -0600 | commented question | Calc Grain of Image? (Difference between two Pictures) Difference between what? How do you define the 'grain' of an image? Percentage of what? Are you using some kind of texture descriptors? Or is your question about choosing such texture descriptors? |
2014-05-13 05:21:30 -0600 | commented question | problem of application of the algorithm to the video k-means Please spend more time to formulate your questions more clearly. Otherwise you will have a bad experience here and not know why. People will be helpful but first you need to put some effort into asking your question. What is your goal? You can even upload example images. |
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2014-05-10 10:38:41 -0600 | asked a question | Mat::col() to std::vector bug? I'm trying to convert a column of a However, if I replace the line with then it works as expected and outputs lines 1, 3, 5.
With some other matrix sizes (e.g. 120x2) it even crashes at I'm using OpenCV 2.4.8 Debug build, GCC 4.8.2, Ubuntu 14.04 LTS 64-bit. |
2014-05-04 10:02:49 -0600 | asked a question | How to step into OpenCV source when debugging in Qt Creator? I'm trying to step into OpenCV source files while debugging. I'm using Qt Creator on Ubuntu 14.04 64-bit with GDB and GCC. OpenCV version 2.4.8. I built OpenCV from source using CMAKE_BUILD_TYPE=Debug and later also with ENABLE_PROFILING just to make sure. Still, I cannot jump into the OpenCV source when I'm debugging. Do I need to set something in the .pro project file? Or maybe set up some Source Mapping in Qt Creator settings? Thanks! |