I am unable to build opencv using mingw codeblocks.?(totally a beginner)
D:\opencv\opencv-master\modules\highgui\src\window_w32.cpp:51:6: warning: "_WIN32_IE" is not defined [-Wundef] #if (_WIN32_IE < 0x0500) ^...
View Articleimshow displays image too wide
I installed OpenCV 3 on my Mac (El Capitan, 10.11.6) via homebrew and tried to load and display an image by using exactly the code from [this...
View ArticleLooking for videoCapture functions code
Hello, I'm very new to OpenCV and I'm trying to find how some of these functions were actually implemented. Take the videoCapture class for example. I can find all of the videoCapture functions easily...
View ArticleAssertion failed while using findEssentialMat()
I using findEssentialMat() function so I can later recover the relative pose (translation and rotation) between two following frames of a webcam with recoverPose(). However, I get an asserion failed...
View ArticleBFMatcher match giving error
I am using SURF descriptors for image matching. I am planning to match a given image to a database of images. import cv2 import numpy as np surf = cv2.xfeatures2d.SURF_create(400) img1 =...
View Articlepermission to use images from opencv website
Hi everybody, Does anybody know legal way to use the images from opencv website in the blog/video/report etc ? Where it is possible to take permission ? Thanks, Viktoriia
View ArticleLine segmentation in handwritten text
I'm developing a simple script for extracting features of each of the lines of a image that contains handwritten text. After thresholding the image I add to the Numpy matrix a complete white row and...
View ArticleTranslation Vector upto a scale factor (odometry).
Hello, I apologize in advance for a question not directly related to opencv, but I have a question regarding a project [paper](http://avisingh599.github.io/assets/ugp2-report.pdf) I am reading about...
View ArticleWhy in open cv morphology operations is inverted?
For example dilate in open cv is erode and vice versa.
View ArticleDrawing an outline based on outside contour
How does one draw an outline based on the outside edge of a contour? I've tried drawContours, but that seems to only draw the contours on an existing image - but how does one simply extract the outside...
View ArticleDetect not regular rectangular object does not work correct
I would like to detect not regular rectangular objects using OpenCV and approxPolyDP function. In the image I have 4 windows that can be approximate as rectangular contour using the approxPolyDP. But...
View Articleopencv 3.1 imshow not working when graphic driver is enabled pi3
Hi Friends, Once we enable the experimental graphical driver, opencv 3.1 imshow does not work, it does nothing and the very basic program hangs for infinite. My sample code is as pasted below:...
View ArticleWhich dataset is used for training the DefaultPeopleDetector (HOGDescriptor)
Hi all When I try to create my own PeopleDetector using the INRIA dataset, I don't get similar performance as the DefaultPeopleDetector. So my question is, which dataset has been used for training the...
View Article***** VIDEOINPUT LIBRARY - 0.1995 - TFW07 *****
I have a problem I did what you show this video, altough I see this error : ***** VIDEOINPUT LIBRARY - 0.1995 - TFW07 ***** I am also add: Properties-> debugging->Command Argument:...
View Article[SOLOVED]cap_libv4l.cpp
I see now that into cap_libv4l.cpp (I think it is the file that uses opencv3.0 to follow up the call cv :: VideoCapture ......) there are 2 choice ...libv4l1 and libv4l2 ... and in addition it is not...
View Articletext module build failed
Hi guys. I have builded text module from the contrib-repo without the Tesseract (the text recognition is not necessary ). The cmake output seems right, but the text detection functions such as...
View ArticleAllied Vision VIMBA SDK and OpenCV (JAVA)
Allied Vision [Vimba SDK](https://www.alliedvision.com/en/products/software.html) only provide API support for C,C++ and .NET but my client want me to code in JAVA. From their website i came to know...
View ArticleWhy there is not Android version in 2.4.13 release?
Hi, I wonder why OpenCV has not released Android version along with 2.4.13 release. Does any one have idea?
View ArticleHow to detect(Count) Hair inside rectangle Hair images?
I have write one code to detect hairs from head and get count. But not able to get exact result as per the image exist  ![image...
View ArticleEstimate pose of ArUco markers detected in a stereo-setup
Hi, I have detected ArUco Markers on both images of a stereo-camera setup, and calculated their 3d coordinates with triangulatePoints. How can I calculate their pose in 3d? The ArUco library has some...
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