VideoWriter depthMap
Hi Is there a way to record 16U Mat with videoWriter to an avi file ? After recording, I read my video and the result is CV_8UC3 Mat. For exemple, I get one pixel before record my Mat and i get this...
View ArticleI'm getting OpenCV Error: Assertion failed (!empty()) in...
Im trying to learn how to use OpenCV in java . [Im studying this article .](http://docs.opencv.org/3.0-beta/doc/tutorials/introduction/desktop_java/java_dev_intro.html) haarcascade_frontalface_alt.xml...
View Articlehow to close and reopen videoCapture
Hi, I want to open and close and open again VideoCapture. I have modify example starter_video.cpp : int main(int ac, char** av) { if (ac != 2) { help(av); return 1; } std::string arg = av[1]; { //...
View Articlegain the four corner point
Hello dears, i would like to gain the coordinates of corers according to the pictures which are my progress in this process,but i could not do it.is it possible to guide me for addressing my...
View ArticleActive Contours OpenCV 3.1.0
Can anyone tell me if OpenCV 3.1.0 has implementation of Active Contours?
View ArticleModifying SURF code for better performance
I am new to Computer Vision world. I have implemented opencv SURF algorithm on PC and embedded boards. I am getting a decent fps output. I want to classify SURF algorithm according to performance on...
View ArticleAnyone knows where I could get a CascadeClassifier xml file to identify a...
I'm working with opencv 3.0 in C# .net Thanks
View ArticleI am new to OpenCV and I am writing code using C in OpenCV. I have an...
I tried to create an empty matrix using Mat function but it shows me error.
View ArticleUsing OpenCV4Android, how to blur a part of an image?
I am using `inRange()` function of `OpenCV4Android` to detect a colored blob in an image. Then I am using `drawContours()` to draw the contours around the selected object. What I want is that when the...
View Articleundefined reference to gp_camera_autodetect
Hi, i'm trying to install OpenCV 3.0 on my Ubuntu 12.04, i'm getting error ../../lib/libopencv_videoio.so.3.0.0: undefined reference to `gp_camera_autodetect' collect2: error: ld returned 1 exit...
View ArticleOpenCV C++ Stereo Calib Example
Hello Everyone, I want to run the OpenCv Stereo Calib samples. But I have a error message like "**0 pairs have been successfully detected. Error: too little pairs to run the calibration** " I created...
View ArticleWhy the trained model's performance is not the same while running on PC and...
Hi, I have trained a cascade classifier for a particular object. The classifier is supposed to be used in android app. For testing purposes I've written a python script and the model performance...
View ArticleI can't download SFM dependancies on ubuntu
Hello I'm following [this tutorial](http://docs.opencv.org/3.1.0/db/db8/tutorial_sfm_installation.html#gsc.tab=0) to install the SFM module. The repository is corretly add on line 16 but the update on...
View ArticleHow can I use the contours?
I'm new to opencv in c++. And I know now that I can detect objects using color detection. And the final result of the color detection process are the the contours, which represents the area of the...
View ArticleAbout opencv_traincascade....
Hello, I am currently trying to train my own cascade based on [Naotoshi Seo's tutorial](http://note.sonots.com/SciSoftware/haartraining.html#w0a08ab4) and [Codin Robiin's...
View ArticleHow to write and then read a CV_64FC1 and preserve precision?
imread and imwrite apparently don't work with floats, so I should convertto integers, but then, there is no 64bit integer that I could recast to 64bit float. So what do I do?
View ArticleHow to use KLT tracker in Visual Studio
Hello ,I am trying to write a program that detects abnormality in crowded scenario. In which I first detected the interest points using Spatio-Temporal Interest Point...
View ArticlePassing "hints" to Object Tracking algorithm?
Is it possible to pass "hints" to any of the object tracking algorithms to improve performance? Having a robot with onboard object tracking, I know my robot is about to turn left so I wonder if I can...
View Articlehow to split mosaic image by their edge?
image is as below,it is a mosaic image, it is consist of three images, i want to get the two edge position that separate the three images, how to do this? my problem is how to recognize the image is a...
View ArticleProcessing Camera stream in Opencv, pushing it over RTMP (NGINX RTMP Module)...
Output video: https://youtu.be/VxfoBQjoY6E **Explanation:** I want to: Process camera stream in Opencv and push it over to RTMP server. I already have NGINX (RTMP module) set up and I have tested...
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