kmeans in Android (Java)-
Hi, I've tried to use kmeans function, but something is not clear to me. Lets say that I have an array of points and I want to center all of them to four points : topLeft, topRight, bottomeft,...
View ArticleRecording Video of an Event
Hello, I am a test engineer and I am performing a continuous test on a product. I am reading a parameter of the product from a sensor and when that parameter is within a certain range the test fails....
View ArticleDo I need to calculate hist at prediction time in SVM?
I am training my dataset with the below code: for file in glob.glob('C:\*.png'): image = cv2.imread(file, 1) image = cv2.resize(img, (60, 120)) hog = cv2.HOGDescriptor((60,120), (8,8), (4,4), (4,4), 9)...
View ArticleI can not install ArUco globally
Ubuntu 19.04. I have installed OpenCV 4.1.1 like this https://github.com/milq/milq/blob/master/scripts/bash/install-opencv.sh But, when I install ArUco via cmake, the following happens ![image...
View ArticleCvException
Caused by: CvException [org.opencv.core.CvException: cv::Exception: OpenCV(3.4.6) C:\build\3_4_winpack-bindings-win64-vc14-static\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion...
View ArticlecopyTo don't work
I want to make app which swap faces in picture. The mat of the picture is picMat, and I want to copy a mat of detected face on picmat, but the function copyTo don't work. here is the code: Bitmap...
View Articleinstalled Opencv 4 from source, C++ headers not linked correctly
I jusst installed Opencv 4.1.1 from source, with python 3 bindings. My Python installation seems to work correctly, because if I run: import cv2 cv2.__version__ I get '4.1.1' However, I also want to...
View ArticleWhich are color blind safe palettes?
I am looking to use a color spectrum safe for color vision impaired viewers. Are there color vision impaired safe palettes on ColorMaps in OpenCV? An example palette I would like to use is found in...
View ArticleHow to make transparent background While Stitching using homography
I have 2 images, I want to stitch them using homography. But I want there won't be any black border in the result image. So I should use transparency. Do I need a create transparent background/mask?...
View ArticleHow to use CV_FOURCC in version 4.1.0?
Hi, i am new with openCV. i'm trying to paste a code snippet from old versions. But i get lots of error. VideoWriter parlakVideo("videoParlak.avi", CV_FOURCC(‘M’, ‘P’, ‘4’, ‘2’), 20, boyut, true);...
View ArticleUsing OpenCV in Windows 10 with Visual Studio Code
I'm having a nightmare trying to get OpenCV to work. I've installed it with no issues, but when I try running an example code it can't find the include files. I'm using Visual Studio Code (different...
View Articleidentifying multiple leds
Hello I want to write a program to check the presence of multiple objects, for example leds, of different classes (like led colors) in an rigid environment, for example on an PCB, when the camera...
View ArticleMask and image
Hi all ! I have an image in true colors and a mask black and white, I want to make an image which white pixels of the mask become red in the result image and the black pixels of the mask become true...
View ArticleAny functions like numpy.polyfit in OpenCV?
i am trying to implement or kinda of 'porting' a Udacity Advanced LaneDetection project in C++ code this project has been originally implemented in Python but i would like to implement in C++...
View ArticleGpu memory leak when resizing asynchronously
I'm facing some problem with gpu resize using opencv. Here is my code: #define MX 500 #define ASYNC 0 class job { public: cv::cuda::GpuMat gpuImage; cv::cuda::Stream stream; cv::Mat cpuImage; ~job() {...
View ArticleDifficulty building OpenCV with MinGW
I'm trying to build OpenCV 4.1.1 with MinGW32 from the source (in Windows 10 and for C++). I've been following the instructions at the bottom of this page:...
View ArticleSegmentation fault while using createTrackBar in OpenCV-Python
I am using OpenCV 4.1.1. When I try to run the trackbar tutorial code, I get the segmentation fault (core dumped) error. It seems that the crash occurs when the trackbar is created in an existing...
View ArticleUsing inpaint to restore old photo
I am trying to use OpenCV's built-in "inpaint" function to restore "damaged" areas of a photo (i.e: crease). However, after using the "inpaint" function, the resulting image contains a distortion in...
View ArticleJupyter kernel crashes after running "train" for decision tree classifier
I tried to perform training on my data and on toy example too. Command prompt doesnt show anything but the message about restarting. segm_features = np.array([[1,0], [1,1], [0,1]]) labels =...
View ArticleOpencv 4.1.1 and Android Studio
Hello, i tried since three days to create a new project including opencv4.1.1 on Android Studio 3.4.2 I follow a lot of article but nothing append : when my app is starting, the opencv library won't...
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