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The auction seduced interest from a diverse array of companies which range from Japanese online merchant Rakuten Inc (4755. A cool history of mobile games and how the gaming craze hasn't left mobile...
View ArticleUse computeNMChannels with the ERFILTER_NM_IHSGRAD option
Hello I am trying to use the function computeNMChannels with the ERFILTER_NM_IHSGRAD option instead of the ERFILTER_NM_RGBLGrad default one in a python script. The following line throws an error:...
View Articleslow when calculate moment
Hi everyone, I try to write my own function to calc the moments as below: double getMoment(Mat roi, uint8_t mode) { double mm = 0; for (int x = 0; x < roi.size().width; ++x) { for (int y = 0; y...
View ArticleVideoCapture, impossible to switch to correct
I have a movie encoded as mj2. The individual frames are 16 bits unsigned grayscale. Using the Java API through Scala, I devised the following code to test the video capture possibilities of OpenCV:...
View ArticleError could not find a writer....
import cv2 # 0 is refrencing first camera camera = cv2.VideoCapture(0) # range is repeating the indented code by whatever is in () for i in range(2): return_value, img = camera.read()...
View ArticleBug in warpAffine?
I think the following examples shows a bug in warpAffine: Mat x(1,20, CV_32FC1); for (int iCol(0); iCol(0, crop.cols-1) - crop.at(0, 0))/(crop.cols-1); Mat constGrad = crop.clone().setTo(0); for (int...
View ArticleDigit recognition without OCR
Hi! I was wondering if we could read digits from an image without using OCR or template matching. I was thinking of using contours, but the process is too tedious. Is there any alternate solution?...
View ArticleHow to extract Angle , Scale , transition and shear for rotated and scaled...
I 'm using the following sample [Features2D + Homography to find a known object] (http://docs.opencv.org/2.4/doc/tutorials/features2d/feature_homography/feature_homography.html) to find rotated and...
View ArticleCan I upload OpenCV Mat with curl?
Can I upload OpenCV Mat with curl? Without save on drive? I have Mat image and want upload him like I sent a picture from drive with C++ curl: curl_formadd(&formpost,&lastptr,...
View ArticleHow to slice image with respect to horizontal line pattern
I am new to opencv and trying out segmenting operations. I have this processed image as follows -->  I want to slice the image into separate blocks...
View Article[Python] Real time image stabilization with Optical Flow
Hi! I'm new here on this forum, and would love some help with a project I'm working on! I'm trying to make a small image stabilization programme in Python, but I can't get it to work the way I want....
View ArticleOOM occurs when calling detectMutiScale on android
the error message was OpenCV Error: Insufficient memory (Failed to allocate 118180608 bytes) in void* cv::OutOfMemoryError(size_t), Caused by: CvException [org.opencv.core.CvException: cv::Exception:...
View Article[Android]VideoWriter output mp4 file
How to write output mp4 file video use VideoWriter. As I know opencv only support fourcc mjpg and not support opencv_ffmpeg library. Someone can tell me the solution to do this. Thanks!
View ArticleIs there an implementation of "Fastest Pedestrian Detector in the West" that...
I'm looking for an implementation of this algorithm that is ARM friendly, I only found the author's and another that is a port from MATLAB to OpenCV, but both depends on SSE instructions. - P. Dollár,...
View ArticleLinking error on compile
I installed opencv on fedora 24 with g++ 6.2.1 and cmake 3.6.2. I launched cmake CMakeList.txt in 'samples/cpp/example_cmake/', it work, but when I use 'make' I obtain: [ 50%] Linking CXX executable...
View ArticleCan't get predict confidence
When I run the predict(src) function, it returns only a int, instead of a int and a double. using help() throws this: Help on built-in function predict: predict(...) method of...
View ArticleCan't open RTSP stream with OpenCV cuda video_reader
I am running the example `samples/gpu/video_reader.cpp` and it's working with video files but when I try with any RTSP stream the it gives error. OpenCV Error: Gpu API call (CUDA_ERROR_FILE_NOT_FOUND...
View ArticleTrackWithOpticalFlow Alternatives
*EDIT*: Added Beraks suggestion of downscale/upscale. **EDIT**: Added additional Changes, Inspired by Tetragram. Inspired by the Mathworks...
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A PPO allows for slightly more options considering that you can go to any health care professional you choose. Legendary BeardThe draw back of that is that you are going to pay extra for doctors which...
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