How does OpenCV handles working buffer arguments of IPP?
I use cv::inpaint repeatedly with the same mask and the same images sizes. How does open cv handles the working buffer when calling IPP inpaint function? Does openCV allocates the working buffer again...
View ArticleConvert bmp to linear jpeg
Hello, I want to convert a bmp image to jpeg. But I want to be able to change the parameters of the jpeg image that is created. I want to use linear gamma, because i want to get linear jpeg in the...
View ArticleWhat does the getOptimalNewCameraMatrix function does?
For example, in this [tutorial](http://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_calib3d/py_calibration/py_calibration.html), I have some problems in understanding the...
View ArticleReal time image detection (Python)
Hey guys, I wanted to ask which methods would be ideal for finding a certain image via a camera. I started OpenCV 2 weeks ago so am still relatively new to this but have looked into using Multi-scale...
View ArticleExtract the Date and Time an Image was taken using OpenCV!!!
Hello everyone, I wrote a program that capture an Image from a Webcam and save the image in a folder. Now , I want to extract the date and the time that Image was taken using Opencv. I will use this...
View ArticleGtk_error for imshow in python
I am getting errors when I am using cv2.imshow in python. I am using opencv2.4.13. Would like to seek for advice on how should I fix it? Below is the error message:...
View ArticleToupCam VideoCapture Not Working
I am trying to get a microscope camera to work with opencv, my webcam works when using VideoCapture(0) and -1. However the microscope camera I am using, OMAX A35140U (ToupCam), will not work when...
View ArticleTake picture with color blob detection
How do I take a picture with color blob detection? I seem to have some problem merging camerabridgeviewbase and javacameraview, that is why I cannot make the capturing work. What I wanted to happen is...
View ArticleMerging HSV planes to get modified S plane
I separated the HSV planes and modified the s plane.I need the merged image to look exactly like the modified s plane. How should I do that? Modified s plane image: ![modified s...
View ArticleCan a paper printed chessboard affect camera calibration?
In calibrating my camera, I used a paper printed chessboard. I guess because of the nature of the paper, it is not "perfect" since there will be some crumples/wrinkles. In 15 images that I have used,...
View ArticleDoes OpenCV capture/write audio to video??
Hi, I was trying to capture frames from one video and write them to a new video file using VideoCapture and VideoWriter, I could get AVI and MP4 videos after trying different FOURCC such as "XVID",...
View ArticleNew method for faster camera process for ios and android
As per the link https://github.com/opencv/opencv/wiki/ChangeLog i found that "more efficient camera support on Android 5+ faster round() on ARM (it’s also applicable to iOS); big thanks to Manuele...
View ArticleProblem building Opencv 3.1 - cap_gphoto2.cpp errors
I've been running into the same problem with both the release version of 3.1 and the current cloned version of the repository. The problem appears to be in the videoio module when compiling the...
View ArticleHow to install opencv with C++ bindings on raspberry pi?
I would like to install the opencv packages and libraries on the RPi 3. I have already installed cmake and i will be coding on codeblocks. Could someone explain as to how could one go about the opencv...
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View ArticleOpenCV 3.1 - Static Linking with Dynamic Referencing
Hello there, I'm currently trying to deploy an application that relies on OpenCV 3.1 and I want to link OpenCV statically. I was able to compile OpenCV 3.1 using CMake on Windows 8 x64 and it created...
View ArticleBuild Python bindings separately
Hi, Is it possible to build the Python bindings for OpenCV separately to the main build - something like a standard distutils setup.py? On our supercomputer cluster we maintain quite a few versions of...
View ArticleHow to compile a sample code written using Opencv cpp libraries and CUDA .
Can some one please guide me compiling a sample code, which loads and display an image. Code is written using OpecnCV libraries and certain CUDA properties. nvcc `pkg-config --libs opencv` -L....
View ArticleI am working on pedestrian detection how to extract hog features in open cv???
As i mentioned in the question i am working on pedestrian detection as i am very new to open cv so i want to extract hog features and train my dataset i m not getting how should i write the code so...
View ArticleBest function to analyze 2D mosquito position
Hi guys, I've been findcontours on my webcam to map a 2-D position of mosquitoes in a chamber but the results are marginal. Here's a snippet: for (int i = 0; i < contours.size(); i++){ vector...
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