Quantcast
Channel: OpenCV Q&A Forum - Latest question feed
Browsing all 19555 articles
Browse latest View live

Image may be NSFW.
Clik here to view.

Just How To Do The Crossover In Baseball

One sure-thing that can spring to mind is the renowned NBA anytime your head is to think about hockey. Versions that are expensive are usually just about the exact same of the things they contain in...

View Article


VideoWriter not writing frames to H264 output file

I am VideoWriter to write frames which are read from VideoCapture. The H264 file has the header and tail information written, but no frames are written in the file, the file is just 1KB large. I am...

View Article


Image may be NSFW.
Clik here to view.

Related Articles

By having an variety of straightforward solving options you'll be able to support this classy piece of alfresco bbq -ware onto just-about any patio. England's glory while in the Subsequent World War...

View Article

Compiling 2.4.11 on Ubuntu 16.10

I upgraded without thinking to ubuntu 16.10 yesterday, with the result that I can no longer compile OpenCV or even run older versions due, I presume, to changes in shared libraries. The problem seems...

View Article

Arctan2(Mat a, Mat b) in opencv?

How can I do arctan2(Mat a, Mat b) with opencv as same as with python np.arctan2? Thanks

View Article


OpenCV Error: Bad argument (Unknown array type) in cvarrToMat

Hello everyone! I am trying to run camera calibration code on my Desktop(Ubuntu 14.04) : http://docs.opencv.org/2.4/doc/tutorials/calib3d/camera_calibration/camera_calibration.html I tried to adapt...

View Article

how to detect whether a person wears helmet or not?

Helmet detection in a video stream

View Article

object Detect with green rectangle on android

object Detect with green rectangle and also i know distance between them.

View Article


How to decompose homography transformation matrix in opencv

Hello, I have found feature points detection and matching using SURF and based on homography transformation matrix. Now, I want to decompose homography transformation matrix to retrieve rotation and...

View Article


text extraction from image

I am able to detect text i.e getting bounding boxes around the text. but i want to segment detected text from background. How can we do that???

View Article

Distance between VLAD descriptors: dot product or euclidean distance?

In the [paper][1] introducing VLAD the distance between two encoded vectors is:> The description vectors are compared using the L2 distance. Wonderful. But in [this][2] paper it's stated that: >...

View Article

Interpret results from triangulatePoints

Hi, I am detecting ArUco Markers with a stereo setup and would like to know the 3d coordinates of the corners. I am using triangulatePoints to achieve that (the rig is fully calibrated and I am calling...

View Article

Stitching two fisheye images

I have been trying to stitch two spherical (fish eye) images together by using opencv. I have tried there sample code:...

View Article


ConjGradSolver: how to properly use setFunction to avoid assertion failure?

I'm using cv::ConjGradSolver in OpenCV 3.0 and I'm facing a failure in a debug assertion when exiting the scope of my function. Here is my minimal (not) working code: void Fitting() { TorusFunction...

View Article

Training a lbp detector/classifier

Hi! I've been trying to create an LBP detector/one class classifier and I am running into some issues. I currently have 500 positive and 1500 negative images with a resolution of 1929x1341. The...

View Article


Cannot classify correctly.

Dear Sir, I am playing with the model of Logistic Regression. I just want to classify a set of numbers from 0 to 9 for the numbers smaller than 5 as class "0" and others as class "1". However, It has a...

View Article

Kinect v2 Callibration for ROS

Hello, I am using ROS Kinetic and I am trying to calibrate a Kinect v2 according to the instructions presented [here](https://github.com/code-iai/iai_kinect2/tree/master/kinect2_calibration) I have...

View Article


using opencv framework in ios

Has anyone successfully used opencv framework that is available for download on the opencv website in an ios project. When I try to use the framework I get errors on installing the app saying that...

View Article

How can i get the brisk's orientation?

Hello, I'm trying to extract the orientation and scale from brisk's descriptors, but i don't know exactly how. I've already get the keypoints and the descriptors from my image. Can anyone help me?...

View Article

MIDL2025 Error when building OpenCV using Visual Studio 2015?

So, I'm kind of new to C++ and I'm having some problems trying to build OpenCV using Visual Studio 2015. I'm not sure if this is the correct way to do it, but I dragged all the source files from...

View Article
Browsing all 19555 articles
Browse latest View live