Joining two images
I am quite new to Opencv and DIP in general so needed bit of help in stitching of two images.The problem background is , there are two pieces which have their adhesives/glue torn apart from two joined...
View Articleinconsistent behavior about ROI calculation
As we know: Mat img(7, 8, CV_8UC1, Scalar(0)); Mat com = (Mat_(4, 3) << 255, 0, 0, 255, 255, 0, 255, 255, 0, 255, 255, 255); img(Rect(1, 2, 3, 4)) += com; We will get a `img` like this:...
View Articlealgorithm used in licence plate recognition
algorithm used in licence plate recognition using opencv
View ArticleSIFT detection with opencv+python
When I use opencv to sift detection, program always wrong. It show: module 'cv2.cv2' has no attribute 'xfeatures2d'. I had download same version of opencv-python and opencv-contrib-python(3.3.0.10),...
View ArticlecomputeECC returning strange values
From version 4.1.x there's the opportunity the compute the enhanced correlation coefficient between two images. It seems to me that it's not working correctly. My two images are very similar and I get...
View ArticleI am trying to compare Modal posture to my posture
Hello I used https://medium.com/@dwayneforde/image-recognition-on-ios-with-swift-and-opencv-b5cf0667b79 this link to integrate open CV and compare one of model posture to my posture but after...
View ArticleHow to start Raspberry pi and opencv?
Please suggest some book or video where i can start development in python .
View Articleone point (u,v) to actual (x,y) w.r.t camera frame?
Hello, I am detecting center of circle and getting (u,v) of that coordinates in Image. Now I want this (u,v) into actual world coordinates (x,y) w.r.t to camera_frame. I do not need z coordinate. How...
View ArticleAndroid DNN tutorial
Hi I'm having issues with running the example at https://docs.opencv.org/3.4/d0/d6c/tutorial_dnn_android.html and I'm getting this error: 2019-05-26 19:36:02.333 23779-23862/com.example.dnntutorial...
View ArticleIs there any function to create cuda context in opencv similar to what...
I am developing an app which requires to use cuda functions like cuInit, cuCtxCreate etc. If i use these functions from cuda library then i get the following error which i mentioned in this issue...
View ArticleDetect vehicle from video stream
Has anyone been able to get OpenCV to detect a vehicle from a live video stream? This is for cars driving at 120 kmh. If so, can you kindly share what you have done? Feel free to PM me.
View Articletracking points
 as you can see now I have six points in this picture, I know that mouse callback function can track one point at one time. I am wondering can I use...
View ArticleWhere to start?Im trying to make a vehicle detetion program
I am new using OpenCV.I want to make a program in C++ that can detect vehicles(including bikes) when they cross some point from a real time video streaming.Im a little bit lost with this,i found some...
View ArticleVideoWriter output video is not playable
So I tried running this code.. I have a LOGITECH webcam, and it works fine with the imshow, however when I added the VideoWriter feature to save the video feed, the video file appears but is not...
View ArticleI want to find the actual width of the book in the image which under laser
I want to find the width of the book in the image which under laser. Image attached. How to find the laser portion only that to only the horizontal one which is larger portion and then calculate its...
View Articlepaper edge detection and perspective transform
before image https://imgur.com/f190UFk processed image https://imgur.com/JkEhWkS you can see the "processed image" has highlight, so the transform works bad. any possible to make an rectangle that...
View ArticleHow to get xpos and ypos value using FindContours
Hello I'm trying to recognize image contours using OpenCV4 with Android Studio(kotlin). However, I don't know how to get xpos and ypos value from MatOfPoint variables. ( MatOfPoint variables is output...
View ArticleCan not find cv_cpu_config.h file?
I want to build opencv_trancascade application. I see sources at opencv/source/app/trancascade. I have added all this source in Visual Studio and build. But I see error **Cannot open include file:...
View Articlewhich algorithm can better get location of object
hi guys, i make a project about robot arm to grasp medicine box and recognite. so i need to first locate the object (x,y,z and the rotation) and let robot arm to grasp. but i don't know any algorithm...
View ArticleChessboard reflection light
Hello, For a calibration purpose, I use a chessboard with OpenCV, but the Chessboard is not always detected due to reflection of light. Could you help ? Thank you
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