Blurring non-rectangular region of an image, then downsample whole image
Hello, I am using OpenCV3 to blur and downsample an image, I just want to blur the region inside the area defined by a binary mask like: [![enter image description here][1]][1] After that region is...
View Articlecannot find included source in Visual Studio 2015
As the title says, I am having trouble starting a project in Visual Studio. I have gone through all of the steps several times now as described in this youtube video:...
View Articleselect multiple points with mouse (opencv 2.4.9,vs2010,winforms)
Hi, I'm trying to select multiple points by mouse (with cv::EVENT_LBUTTONDOWN). So I'm passing the std::vector to the Callback-Function: //setting the roi manually std::vector points; cv::Mat img =...
View ArticleopenCV, YUV camera and GStreamer
Hi, I have an I.MX6 board with Ubuntu on it and a parallel camera (which seems to output a YUV instead of RGB). I'm trying to make a very simple demo: a simple shell script which will use GStreamer...
View ArticleComparing patterns on coins.
Hello. I'm having a trouble comparing patterns on coins. I have fully working comparison of diameters, but some coins sadly have the same diameter. How can I accurately compare these patterns. I'd like...
View ArticleUnhandled exception error in FlannBasedMatcher
Hello. I'm a noob on OpenCV world. When I'm doing feature matching using surf, I have a problem. Please help me. I have built opencv3.0 with opencv_contrib_module on github. And I use Visual Studio...
View Articlefinding 3D coordinates
hello all, i am rather new to opencv, but doing quite ok in python ... - now i'm faced to determining 3d coordinates of an object inside a defined coordinate system....
View ArticleProgram works differently from IDE and from system
Using a simple code to open the camera: // hardcoded for this time string _pathToCam = "rtsp://192.168.2.2:554/user=admin&password=&channel=1&stream=0.sdp?real_stream--rtp-caching=100"; if...
View ArticleHow to reduce false positives for face detection
I'm using the `CascadeClassifier` object to detect faces in a video sequence, but I'm seeing a high rate of false positives. To combat this, I thought I would try to detect eye pairs within the ROI of...
View ArticleCamera projection matrix from fundamental
I'm pretty new to OpenCV and trying to puzzle together a monocular AR application **getting structure from motion**. I've got a tracker up and running which tracks points pretty well as the optical...
View ArticleIs there any face detector in opencv using HOG?
I have used the HAAR based detector in opencv ,but the number of false positives it gives is quite large
View ArticleTrain dataset for temp stage can not be filled. - opencv 2.4.8
Here is my dir structure: D:\opencv\.... D:\logo\... I ran the following powershell scripts: Get-ChildItem -Path ".\negative" | ForEach-Object -Process { "negative\" + $_.Name } | Out-File -FilePath...
View ArticleOpenCV LBP traincascade stuck with a False Alarm of 0
I have asked the same question on [stackoverflow](http://stackoverflow.com/questions/22477687/opencv-lbp-traincascade-stuck-with-a-false-alarm-0). I have been using OpenCV's traincascades to detect...
View ArticleHow to use #include cvcam.h in opencv 3.0?
I am trying to run a program that includes the header `cvcam.h`. It was made with opencv 2.4 but now i am trying to run it with opencv 3.0. For the header `#include "highgui.h"`, i changed it to...
View ArticlePush & Pop a frame out of Mat vector
I have a vector frame_queue which i am using to store incoming frames from a USB camera. I want to pop out one single frame at a time to further process those frames. I followed this link...
View ArticleText recognition in OpenCV?
So, here is the thing. I have written a license plate detection program and it works fine. Now, the next step is to recognize license plate number. I researched a lot and found out OCR is a great tool...
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Pilates linked to better balance in older women with back pain
Thomson ReutersTrainer Anne Marie Smith leads guests in a Pilates workout before dawn at the Biggest Loser Resort in IvinsBy Lisa Rapaport(Reuters Health) - Older women with lower back pain who add...
View ArticleOpenCV dft audio getting spectrogram
I have a audio sequence that was captured with my microphone. This sequence is represented in a cv::Mat object with 1 row and n columns, where n represents the number of samples (=length) of my audio...
View ArticleTrying to use CMake and OpenCV
I'm getting the following error when trying to cmake a directory that has a CMakeList.txt and a file.cpp : CMake Error at CMakeLists.txt:3 (find_package): By not providing "FindOpenCV.cmake" in...
View ArticleI think I've installed OpenCV correctly and made a program correctly....
dyld: Library not loaded: lib/libopencv_videostab.3.1.dylib Referenced from: /Users/Krishna/ComputerVision/BlurImage/./BlurImage Reason: image not found I have a Mac and I am running Yosemite. I'm...
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