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View ArticleHow to use the dense sampling detector to image with OpenCV3_python?
I am using python2.7, OpenCV3 with opencv-contrib to image processing. So I can use SIFT and get features as follows, sift = cv2.xfeatures2d.SIFT_create() kp = sift.detect(gray,None) des =...
View ArticleHow to compare two contours irrespective of scaling factor
I have two images(a human shape contour,drawn from a human image and another contour i had drawn from my captured image from by camera). I used **Canny** Edge detection to find the edges of the image...
View Articleopencv 3.1 installation and BaseFilter class
Hi, I tried compiling and installing opencv 3.1 on my Ubuntu box. After the installation I was trying to create a custom filter using the `cv::BaseFilter` class. But I cannot find the necessary...
View ArticleOpenCV source make error: OpenCV/modules/features2d/src/matchers.cpp:47:23:...
Hi, Am using OpenCV3.1,Python2.7. At sudo make of opencv source cloned from git rep, below log excerpt: (Kindly guide. Thanks in advance). [ 77%] Building CXX object...
View ArticleOpenCV FaceRec problem
Hey guys, I'm using OpenCV Version 3.1. I'm trying to use the LBPHFace Class (http://docs.opencv.org/trunk/df/d25/classcv_1_1face_1_1LBPHFaceRecognizer.html) But it seems that im doing something...
View Articlewindows10,x64bit,vs13...plz help to solve my error.
(/upfiles/14737000232634693.png) Code: #include #include using namespace cv; int main(void) { Mat...
View ArticleVideoStab.cpp Customization
Is there any way to stabilize the video from the live camera? There must be some delay, but that's OK. But the videostab.cpp inputes only video. Can you please help me with the customizing this code?
View ArticleRotatedRect creation from vertices
Hi everybody, I'm writing a program (a drone simulator) that does the following: 1) it creates a blank window with two orthogonal lines, to simulate a wall intersection; 2) it creates a RotatedRect,...
View ArticleAccessing pixel intensity values 16 unsigned char
I have the following reference: [Link](http://docs.opencv.org/2.4/doc/user_guide/ug_mat.html) to access the pixel intensity values of an image. This image is being converted from ROS to OpenCV and can...
View ArticleDifference between unsigned and signed of CvType
I heard about CvType.CV_8UC4 from this [site](http://stackoverflow.com/questions/13428689/whats-the-difference-between-cvtype-values-in-opencv) which is unsiged. What is the purpose or difference with...
View ArticleHow well you can measure the distance with the help of photos taken on the...
How well you can measure the distance with the help of photos taken on the phone's camera? I need to measure the human figure 3 feet, how well it can be done? Ideally, the need to measure the error...
View ArticleHow does onTouch work completely on color blob detection?
I am new to Opencv and java I'm trying to understand the onTouch method of Coloblobdetection of OpenCv. So far I have managed to define the purpose of some line and the other methods but I wont go to...
View ArticleAndroid Opencv Perspective Transformation not working as expected
I'm working with perspective transformation in opencv for android for a personal project. The thing I'd like to do is to acquire a document like CamScanner does. For this I import a picture and let the...
View ArticleDetect stamps (seals) on image
Dear forum, I have a lot of images of documents, where I need to detect stamps. I couldn't make a solution that would automatically adjust to different kinds of images. So here is my offer. I am...
View Articleerror calling contourArea
Basic motion detection, not sure why error below is being thrown, how to fix? OpenCV Error: Assertion failed (npoints >= 0 && (depth == CV_32F || depth == CV_32S)) in contourArea, file...
View ArticleIs anyone know how to use opencv 3.1 in eclipse ide? (windows 64bit) ive...
Is anyone know how to use opencv 3.1 in eclipse ide? (windows 64bit) ive searching for days now and still cant figure out how. Ive tried this method...
View ArticleBest Way to Detect Contours Consistently?
Hi all, this is my first time in the forum. I've been working a project to detect the contours of an object from a live video feed. My goal is to implement this in a robot so it's able to follow the...
View ArticleHow to build opencv 3.1 libraries in Windows 10 64bit? That I can use in...
Im trying for days now on building opencv 3.1.0. I followed this method( http://cookyourpc.blogspot.com/2015/08/setting-up-opencv-on-windows-with.html) Everything works fine until in buidling the...
View ArticleIssue installing opencv on mac
I have this error after trying to install opencv on mac The Captain: Can anybody help me solving this error please.. [ 31%] Building CXX object...
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