berak's profile - overview

● Student   × 1

• Color constancy in different illumination condition

● Favorite Question   × 1

• Color constancy in different illumination condition

● Good Question   × 2

• Color constancy in different illumination condition
• moderation

● Famous Question   × 2

• Color constancy in different illumination condition
• can't imread or imwrite in python

● Notable Question   × 3

• Color constancy in different illumination condition
• can't imread or imwrite in python
• buildbot does not find xfeatures2d.hpp

● Nice Question   × 7

• Color constancy in different illumination condition
• cv::reduce does not support int as src type
• how to wrap a cv::Ptr to c (in 3.0)
• what is the purpose of the adas module ?
• buildbot does not find xfeatures2d.hpp
• can't imread or imwrite in python
• moderation

● Scholar   × 1

• can't create BackgroundSubtractorMOG in java/android

● Commentator   × 1

• Updating EigenFaceRecognizer with more faces

● Disciplined   × 3

• how to wrap a cv::Ptr to c (in 3.0)
• Unable to get Mahalanobis distance
• Graphical Implementations of OpenCV

● Enthusiast   × 1

● Taxonomist   × 1

● Nice Answer   × 289

• marker creation
• Sort bounding boxes in x- Axis of a image in order
• Opencv fails to capture click down early after previous
• saving this value
• loading an image
• how to process tiff image
• Image is empty
• Access 32F Mat element by pointer
• << operator
• Save Image Sequence real time
• Why the image just disappears in the following code
• CV_8UC3 pixel format question Update
• Location of the headers moved?
• OpenCV vs EMGU
• cvCvtColor Crash?
• Calculation on 16 bit images
• How to extract red color plane in OpenCV C++
• Some problem about displaying a raw image file
• Adding Matrices without saturation
• Problem converting Mat values to float
• change the Height and Width of the image
• Opencv sum()[]
• count the pedestrian amoun from image
• uniform LBP - mapping using lookup table
• simple face recognition
• How to access data from a cv::Mat
• Save a vector<Mat> to a file and read it back in c++
• Opencv Resize memory leak
• Is there a way to save and restore trained neural network weights?
• getting started.. I am lost, wheres the front door?
• Display image?
• finding a sub image in successive frames
• cv::fitline
• Pixel access through python interface
• GitHub fetch latest source code to your forked repository
• How to get the size or area of a contour upon touch
• making effective pull requests
• 4 Cameras Simultaneously
• Question mark behind local time
• Help with Random Trees
• How do I remove duplicate rows in cv::Mat?
• Create a memory continuous cv::Mat, any api could do that?
• Drawing rectangle OpenCV : don't understand a detail
• neural network for pattern recognition examples
• which class can show an image in java?
• what's the meaning of '>' with Mat
• calcHist() usage for RGB histogram...?
• Calculating sum using integral image
• opencv ReprojectImageto3D gives values tending to infinity
• What's the difference between cv and cv2 using python2?
• Clahe implemenation in java
• how to derive from algorithm
• How can I initialize Mat?
• How to control a KalmanFilter using the Java interface ?
• Code conversion in opencv C++
• How can I normalize histogram?
• Sorting contours from left to right and top to bottom
• Matrix to single row
• subtract color from Mat
• how to appened the new faces into the xml file
• Is videowriter API not functional in android?
• BOWKMeansTrainer in Python?
• Missing createFisherFaceRecognizer method on android.
• HEP-histogram of equivalent patterns
• Understanding cv::Mat
• How can i show an image in opencv.
• 3.0 alpha missing nonfree package
• how to extract gabor feature using opencv?
• NormalBayesClassifier classifier is an abstract class
• findcontours problem in vs2010
• Unsupported format or combination of formats in buildIndex using FLANN algorithm
• additive Gaussian noise with different SNR
• Problem with Laplacian Filter
• [SOLVED] how to average N matrices into 1?
• Non-free feature detectors in 3.0
• cv::xfeatures2d::SURF abstract?
• Is FREAK still in OpenCV 3?
• cv::Mat pointers
• modify pixel of image with 0.01
• does any one has a uniform lbp c++ code with it's spatial histogram
• opencv3.0 xphoto missing
• How to compile nonfree module in opencv 3.0 beta ?
• pyopencv_from and pyopencv_to for KeyPoint class
• How can i get a real random number?
• object recognition using opencv without user interaction
• How can i add all 'R' values in the image?
• waitKey(1) timing issues causing frame rate slow down - fix?
• How to perform TLD tracking on ROI bounding box using openCV c++ builtin methods ?
• copy even rows/cols to another Mat
• Missing opencv2/core/utility.hpp
• How to use KNearest and ANN in OpenCV 3.0
• Normalized standard deviation
• Problem on initialize FeatureDetector or DescriptorExtractor on OpenCV 3.0
• Image Registration (OpenCV 3.0.0)
• Problem with perspective
• Detecting multiple squares within a square and extracting their coordinates
• createLBPHFaceRecognizer arguments grid_x and grid_y
• Draw lines from centroid of contour at given angle till edge of contour
• Enabling OpenMP while building OpenCV libraries
• What is the deference between OpenCV2.4.10 and JavaCV 0.10
• OpenCV-Python Tutorials page 404 not found
• estimateRigidTransform( ) in Opencv 3.0.0
• StereoBM in OpenCV 3 (Python) missing module
• Contours radius unit
• Opencv3.0 Shape Module, Compute Distance
• Error building opencv with extra modules (ALL_build build errors)
• OpenCV with QT cv::imread problem.
• How to perform Linear Discriminant Analysis with OpenCV
• Convert Mat to byte[] in C++
• Converting Mat img to one dimensional float array in C++ which is in row, column, channel order?
• Why I cant resize the image with the track bar?
• Algorithm drawContours
• Help with detecting a wrong video header giving wrong frame amount
• How to find if 2 rectangles are overlapping each other
• Trackbar callback as a member function
• Getting error using SVM with SURF
• Display IplImage in webbrowsers
• K means question
• Partition() - Finding the number of Clusters
• How convert blob/binary data to Mat
• load multiple images from a single folder
• How to know if two Mat point to the same data?
• Unable to get Mahalanobis distance
• line extration in opencv_contrib
• c++ to Python Need help to help :)
• Detect cattle in drone video footage
• How to load EM model using OpenCV android sdk V3.0.0
• Signal processing to detect "jag-iness"?
• element wise division in android
• How can Caffe be interfaced using OpenCV
• calculate distance using disparity map
• imshow() shows the image after scanf_s()
• CopyTo() and Clone() functions
• No DLLs are installed with the OpenCV Installer
• What is the alternative of getMat() of Facerecognizer class in opencv3.00 ?
• OpenCV Free for Commercial use
• improving poor blob contours
• How to use InRange at Different Color Space and Range.
• How to draw a circle on an image using mouse click/events?
• first example code error
• BRIEF descriptors in OpenCV 3
• Conversion of 3 channel to 1 channel
• How to implement filters ?
• Graphical Implementations of OpenCV
• I want to draw a line of points
• video stabilization
• What does OpenCV Python interface miss some key classes?
• Memory error accessing grayscale pixel data
• how to use CascadeClassifier::read?
• Classification of Image
• count number of peaks in histogram
• How does opencv convert a bgr image to greyscale?
• Obtaining Pixelvalue with various formats
• KMeans Clustering for vector<Point2f> Data Structure
• Does createLBPHFaceRecognizer() uses spatially enhanced histogram?
• svm predict function always return a large number
• I want to multiply a matrix with a number !
• Convert CV_8UC4 to CV_8UC3,in openCV4Android?
• how to find matching image
• Fast element access macro in C++ API
• Parallel implementation of per pixel calculations
• goodFeaturesToTrack returns 2 channel image and can't be imshowed
• Getting the matrix of Mat type image
• How to implement K nearest neighbour
• How to combine several features of a hand for machine learning
• HoG Training Using SVM
• SLIC error
• How can i cluster moving objects in a video ?
• Deslant handwriting samples
• Can't get predict confidence
• find all the colors of a given image and their pixel position
• Compute Dense SIFT features in OpenCV 3.0
• Measure the Length and Width of the bounding Box
• Toy example using opencv 3.0 object in a custom class
• My contours smaller than a certain value are Not being removed from list of contours, despite of correct logic. Why?
• convert the RGB image to a grayscale representation of its redness
• Cannot find additional libraries in openCV 3.1.0
• Creating custom kernels
• PCA + SVM ?
• Trouble detecting hand drawn shapes
• Construct Gabor Filters and Filter Image
• Can we use Bag of Visual Words to compute similarity between images directly?
• Opencv 3.1 DNN module in Contrib : How train a new model?
• How to display output of reprojectImageTo3D ?
• How to know what to #include for a given function ?
• How to remove green color i.e. to set it to 0 in an image?
• Is there a way to set new window position?
• Error in making graphs in OpenCV
• line scanning for the bar code
• Bio-inspired features returns NaNs
• HoughLinesP vastly different in Python and C++
• how to compile forEach doc example?
• How to initialize Mat size and fill it with zeros in a class ?
• Cannot found openfabmap implementation in OpenCV repo
• How do I install the old cv not cv2?! Python
• Passing multiple parameters with the setMouseCallback function
• reverse thresholding
• I need to do image sequence after extracting frames.
• How to calculate Euclidean Distance d(h,g)
• How to pass 3D array to Mat ?
• How to eliminate small contours in a binary image?
• Matrix multiplication without memory allocation
• What images to use for negative training data for SVM?
• Put two or more frames in one output window
• ORB Detector / ORB Extractor retrieve bad results
• OpenCV 3.0.0, FaceRecognizer and Python Bindings
• How to understand Mat_<float>
• How to start with neural network implementation with Opencv and C++??
• Face Landmarks and face identification
• Cropping of images in c++ vs python
• can we create a 5*5 kernel np array in c++
• Finding Dominant colors in an image in c++
• How to plot dotted line using OpenCV?
• HOG optimal training images
• how to get new center points in kmeans
• cv2.imshow and cv2.imwrite show different output from the same array[SOLVED]
• Which options are set in a prebuilt OpenCV library?
• SVM model fails to load!
• OpenCv 3.4.0 FaceRecognizer was removed?
• Any tool for cropping positive samples
• How do I convert uint8 to CV_8UC1 in OpenCV 3.2 Python?
• Multiple object detection using HOG+SVM?
• How to use a dpm cascade model xml file in a Python script?
• Is there any limit on maximum number of faces detected using DNN face detector?
• Minimal area rectangle for multiple contours
• LBPH parameters explanation
• How to recognized face which are already detected by application?
• Configuration config.xml file FacemarkKazemi Training
• Fingerprint Database
• How to find out if rect is inside another rect ?
• HOG detection clarification
• Motion detection. Undefined symbols for architecture arm64.
• C++ read rgb+depth images sequentially
• Traffic Sign Recognition Concept
• how to compile 3.2 and merge all output library files into one ?
• Has createBackgroundSubtractorMOG been removed?
• 2D spline algorithm in OpenCV
• how to new Mat
• Efficient calculation with multiple cv::Mat
• Send/Receive vector <Mat> over Socket C/C++
• Train images with SVM
• strange result of transformation of frame of VideoCapture
• How to use Mat::forEach position parameter?
• Is it possible to combine 3 photos of different focal lengths to make the clearest image possible?
• Wait for a mouse click?
• A simple question on cvtColor
• Specify background color when rotating an image using OpenCV in Python
• cv::Mat to PCL point cloud, to data ptr?
• wrong predictions from OpenCV Sample Digits.py
• How to detect the "external" pixels in an edge?
• Imread returns a blank image for a certain file
• Identifying and selecting floor in a room
• OpenCV (android) : How to get image metadata
• Is DNN supports threading
• MultiTracker Rois
• error in cmake while configuring opencv extra modules path
• Dnn forward result has rows = -1, colums = -1
• How to move image inside a video
• How to read gif in python ?
• Normalize image 0 - 255 for display
• i want to know how to implement blendlinear() function
• Selection depth area
• Code from the tutorial doesn't work
• How to calculate the head and body angle with respect to the camera?
• cv2.imread fail to open gif image
• How to use cv::flann (radiusSearch) to find all neighbouring points within radius r in 2D using Euclidean distance
• videwriter not working after image resize
• exception in CountNonZero (too see if 2 mat are equal)
• open cv 3.0, findContours return "too many value to unpack"
• Segmentation fault with ORB feature extractor
• Get pixel value of sobel Mat with C++
• Negative values in filter2D convolution
• How to convert a CV_32SC1 to int
• How to combine multiple cv::RotatedRect objects?
• How to generate checkerboard for camera calibration?
• Kmeans support needed
• Can I use opencv without GUI?
• Removing selected rows from a Mat ?
• Read from folder
• [Solved] Simple application crash without errors
• Matching colors between two pictures in OpenCV?
• SimpleBlobDetector crashes silently
• file loaded from std::ifstream to opencv image
• How to access pixels along a line or curve using opencv?
• Make a collage with other images
• how to get the pixel value by clicking on image?
• Does OpenCV forum have a Chat page?
• Simple Way to Scale Channels

● Teacher   × 1

• Needing for C++ tutorials for OpenCV

● Editor   × 1

• Error sending Iplimage using TCP

● Citizen Patrol   × 1

● Necromancer   × 4

• Error sending Iplimage using TCP
• how to understand which functions available in python bindings?
• Compiling OpenCV 3.1doesn't put header files into include directory
• WLD: A Robust Local Image Descriptor

● Organizer   × 1

• opencv 2.4.3 and tesseract libstdc++

● Supporter   × 1

• FREAK compute() speed up

● Critic   × 1

• Error sending Iplimage using TCP

● Great Answer   × 3

• How to perform TLD tracking on ROI bounding box using openCV c++ builtin methods ?
• Draw lines from centroid of contour at given angle till edge of contour
• Display image?

● Guru   × 2

• How to perform TLD tracking on ROI bounding box using openCV c++ builtin methods ?
• Display image?

● Popular Question   × 4

• can't imread or imwrite in python
• Color constancy in different illumination condition
• buildbot does not find xfeatures2d.hpp
• ConDensation algo

● Civic Duty   × 1

• Resizing Image

● Good Answer   × 67

• Image is empty
• Access 32F Mat element by pointer
• Adding Matrices without saturation
• Some problem about displaying a raw image file
• How to access data from a cv::Mat
• what's the meaning of '>' with Mat
• OpenCV vs EMGU
• Display image?
• How to extract red color plane in OpenCV C++
• Create a memory continuous cv::Mat, any api could do that?
• Sorting contours from left to right and top to bottom
• how to extract gabor feature using opencv?
• [SOLVED] how to average N matrices into 1?
• BOWKMeansTrainer in Python?
• Non-free feature detectors in 3.0
• uniform LBP - mapping using lookup table
• Passing multiple parameters with the setMouseCallback function
• waitKey(1) timing issues causing frame rate slow down - fix?
• Problem on initialize FeatureDetector or DescriptorExtractor on OpenCV 3.0
• Image Registration (OpenCV 3.0.0)
• Draw lines from centroid of contour at given angle till edge of contour
• createLBPHFaceRecognizer arguments grid_x and grid_y
• Is there a way to save and restore trained neural network weights?
• Contours radius unit
• Missing createFisherFaceRecognizer method on android.
• How to perform TLD tracking on ROI bounding box using openCV c++ builtin methods ?
• How to perform Linear Discriminant Analysis with OpenCV
• 3.0 alpha missing nonfree package
• Converting Mat img to one dimensional float array in C++ which is in row, column, channel order?
• Problem with perspective
• Detecting multiple squares within a square and extracting their coordinates
• How to find if 2 rectangles are overlapping each other
• subtract color from Mat
• load multiple images from a single folder
• making effective pull requests
• line extration in opencv_contrib
• Detect cattle in drone video footage
• imshow() shows the image after scanf_s()
• cv::fitline
• Problem with Laplacian Filter
• K means question
• Sort bounding boxes in x- Axis of a image in order
• How can Caffe be interfaced using OpenCV
• HEP-histogram of equivalent patterns
• << operator
• Partition() - Finding the number of Clusters
• first example code error
• PCA + SVM ?
• Convert CV_8UC4 to CV_8UC3,in openCV4Android?
• Deslant handwriting samples
• How to remove green color i.e. to set it to 0 in an image?
• CopyTo() and Clone() functions
• How to use KNearest and ANN in OpenCV 3.0
• c++ to Python Need help to help :)
• Unsupported format or combination of formats in buildIndex using FLANN algorithm
• How to initialize Mat size and fill it with zeros in a class ?
• Is there a way to set new window position?
• Imread returns a blank image for a certain file
• C++ read rgb+depth images sequentially
• Fingerprint Database
• Finding Dominant colors in an image in c++
• videwriter not working after image resize
• Send/Receive vector <Mat> over Socket C/C++
• Calculating sum using integral image
• My contours smaller than a certain value are Not being removed from list of contours, despite of correct logic. Why?
• additive Gaussian noise with different SNR
• Identifying and selecting floor in a room

● Enlightened   × 1

• Access 32F Mat element by pointer