[opencv2.4] g++ imread linker error
I got linker error trying to compile this simple code: #include #include #include #include using namespace cv; int main(int argc, char** argv) { std::string filename = argv[1]; Mat A; A =...
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View Articlefinding the highest / lowest contours in a ROI
I am developing an app that searches for contours within a region of interest. I only want to display the top and bottom contours. I have managed to find the contours but i only want to display the...
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Prevent Acquiring The EarthBox Yard Package Until You Review This.
I personally like to grow veggies throughout the warmer months, but during the winters below in New England, all I could do is obsessively strategy next period's garden. The Miracle-Gro AeroGarden 7 is...
View ArticleAndroid:Cannot draw contours
package org.opencv.samples.tutorial1; import org.opencv.android.BaseLoaderCallback; import org.opencv.android.CameraBridgeViewBase; import org.opencv.android.CameraBridgeViewBase.CvCameraViewFrame;...
View ArticleVideo Face indexing
Hello, I put together code to detect faces from a video file, and save the cropped detected faces in individual files. The result is tenss of individual image files for every person. Is there a...
View ArticleWhy does namedwindow("Original Image",CV_WINDOW_AUTOSIZE) show a debug error...
double alpha; /**< Simple contrast control */ int beta; /**< Simple brightness control */ int main( int argc, char** argv ) { Mat image = imread( argv[1] ); Mat new_image = Mat::zeros(...
View ArticlesetMouseCallback(MFCDialogName, onMouse, 0) to MFC Dialog
Hi to everyone! I show the processed video on MFC dialog. How to set Mouse Callback to the dialog? This function only works for opencv window but not in dialog. Can anybody help with this question...
View ArticleProblem in Drawing Contour
Hi guys I have written a simple code which draws the contour. import numpy as np import cv2 img = cv2.imread('New Bitmap Image.bmp') gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) ret,thresh =...
View ArticleThe toughest question in image processing
HELLO I have a problem regarding contouring  A sample test image, as shown in Figure 1, is a treasure map, represented by a 5*5 grid, containing gold...
View ArticleConverting stereo_match.py sample to javascript
Hello there, I am using the Nodejs port of Opencv for a 3D reconstruction project. So im trying to convert the sample...
View ArticleConverting camera frames to float on GPU?
Hi All, I've got a very basic example that grabs frames from a camera, uploads them to a GpuMat, and displays them in a namedWindow with CV_WINDOW_OPENGL as its type. The code below works as expected,...
View ArticleOpenCV 3.0.0 - process new frame callback
Hi, I am trying to implement an algorithm which requires processing a new frame as soon as it is available from the camera. The polling method cannot be used because a lot of serial commands are to be...
View ArticleOpenCV Android- Using Imgproc.moments causes crash
In OpenCV 3.1, the Moments class is back in the Android SDK. Yay!!! However, upon calling the Imgproc.moments function, any of the multiple declarations with either contours or masks as parameters,...
View ArticleOutput Mat object in XCode7.2 debugger console
Hi, How can I inspect values of the Mat object in XCode 7.2 debugger console (lldb)? I've tried commands like `p myMat` and `po myMat` with no luck. *UPDATE* simple `cout << myMat` works in the...
View ArticleBuild OpenCV for Python
Dears, I'm trying to build OpenCV including with CMAKE option "BUILD_opencv_python2" - I finshed always with errors: CMAKE configurtion says: Detected version of GNU GCC: 53 (503) CUDA compilation is...
View ArticleCam prefilters 200pics/d - opencv able to detect 'foreign objects' within those?
Hi guys, more of a fun project than something serious - but pretty curious. I compiled opencv 3.1.0 on Banana Pi yesterday night & was able to bring up reasonable results with...
View Articletrying to search flann index getting weird errors
UPDATE: ok I got it working, but I don't understand the output. It seems to be repeating the same matches over and over, and I'm not sure why. I have updated the code. Here is some sample output...
View ArticleOpencv3 transparent api flann index knnsearch
ok here is what I hope is a simple question. Does anyone know if flann uses the transparent api? In other words would I benefit from passing a UMat to flann::index::index() and...
View ArticleRotate an image using gpumat in opencv 3.0
I would like to ask how to rotate an image in gpumat format in opencv 3.0? cuda::rotate can be found in opencv 3.0 document, but i cannot find this function when i use it in vs2012. Did i forget to...
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