Extracting Palm Lines as separate contour (opencv)
Hi All I am working on extracting Palm Lines from an image. I reached to a point where I am able to extract Palm Lines as contour but problem is : when any palm line is intersecting each other then...
View ArticleViz initialize camera position
How do I initialize the camera such that the scene in 3D is viewed like the image in 2D ? When I run my program, the camera starts off far off from the scene. I have to do a lot of dragging and...
View ArticleCvMat zero initialization confusion with cv::Mat
I was reading a code which was like this : CvMat * MyMat[10]; for(int i = 0; i<10; i++) { MyMat[i] = 0; } what does this do ? Does it initialize the MyMat to 0. And if I want to do the same in...
View ArticleHow to address a specific centroid obtained from the function...
Hello everyone, I hope you can help me with a specific issue. I have been using the function connectedComponentsWithStats to extract the centroid of an object in an image. Here is part of my code, int...
View ArticleOpenCV 3.1.0 Cascade Classifier detectMultiScale provides inconsistent...
I am using Cascade Classifier detectMultiScale to detect text in an image. I am testing on two different machines whose configuration is listed below. The results generated for the same images using...
View ArticleHow do I merge the bounding rectangles generated for i,j and '?'?
I want to create an OCR software using python and openCV. I managed to find the contours and generated the bounding rectangles. However the code seems to detect two separate bounding rectangles for...
View ArticleCompare Camera captured images with computer generated images
I am making an app which compare camera captured image with computer generated images and these images are stored in database. I am using Opencv for image comparison but it only compare computer...
View ArticleOpencv_contourArea
HI, When I calculate the area of via the contourArea function in binary image, I'm not getting the correct contour area. Below the snippet code, why the area is calculated incorrectly ? I have used a...
View ArticleDrawMatching between two images - image recognition
I was trying to show the matched keypoints between two Images (one that is captured from my camera and the other from the database) Can anyone help me out in writing DrawMatches function in my code in...
View ArticleWrong measure on Zaxis on Translation Matrix of SolvePnP
Hi, I am trying to get both rotation and translation matrix of a red square with webcam using SolvePnP. All the values are correct with my measures (with +-1mm of error) except the translation value...
View ArticleQApplication + cv::viz::Mesh::load: Parsing error
I'm trying to load an .obj file using cv::viz::Mesh::load method as follows: cv::viz::Mesh::load(filename, 2); It works fine, but if I call the same method after initializing a QApplication like so:...
View ArticleVideoCapture problem - Inappropriate ioctl for device
I'm trying to open a video VideoCapture video_source; video_source = VideoCapture(); video_source.open("/home/thom/Downloads/output.mp4"); and I'm getting this message: > Unable to stop the...
View Articlecuda_runtime.h error without even including it
Hi, I'm written a very simple "hello world" opencv3 program from which I'm going to start my project. But I am getting an error in currently setting an error and I'm not sure if its because of...
View Articlecudacodec::VideoReader returns 4 channels
Hi, the regular video reader returns 3 channels (BGR) but the gpu version returns 4 channels for the same video. Is there any documentation that could help me understand what format is it returning them?
View ArticleOpenCV for unity template matching
Hi everyone, I am working with OpenCV unity package with Vuforia and there's this issue with familiarizing with the API of OpenCV. I am getting Camera Frames through Vuforia's API whenever the Image...
View ArticleAborted (core dumped)
Run on Python 2.7 and OpenCV with Ubuntu12.04. Thnx enter code here The actual code is: import urllib import cv2 import numpy as np import os def store_raw_images(): neg_image_link =...
View ArticleAborted (core dumped)
Run on Python 2.7 and OpenCV with Ubuntu12.04. Error; terminate called after throwing an instance of 'std::out_of_range' what(): basic_string::substr: __pos (which is 140) > this->size() (which...
View ArticleHow to sort contours left to right, while going top to bottom
I'm finding the contours for an image with digits and characters, for OCR. So, I need the contours to be sorted left to right, while going line to line, i.e. top to bottom. Right now, the contours...
View ArticleCvCapture* capture = cvCreateCameraCapture(0); is not working for me... c++ w10
but VideoCapture cap(0); is working for me..it opens the camera.. please anyone give solution.. #include "opencv2/highgui/highgui.hpp" #include #include using namespace cv; using namespace std; int...
View ArticleDistortion camera matrix from real data
I have a camera for which I have exact empiric data 'image height in mm' vs. 'field angle'. Field angle(deg) Image Height (mm) 0 0 0.75 0.035 1.49 0.071 2.24 0.106 2.98 0.142 3.73 0.177 ... 73.85 3.831...
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