I couldn´t open videos with Python + OpenCV
I try to open videos but I couldn't. I use this code and I try to open viedos MP4 and AVI. I don't know why but if I print the value of cap.isOpened() the returned value is FALSE. import numpy as np...
View Articleno symbols loaded for opencv_contrib2410.dll
I am trying just a basic face recognition program with OpenCV2.4 with the following code: #include "stdafx.h" #include #include //include opencv core #include "opencv2\core\core.hpp" #include...
View Articlehorrible calibration results
Hi, I tried to integrate the calibration sample in my program but the results I'm getting are quite horrible. I think I've copied the essential parts correctly but the results are just wrong. For my...
View ArticleDo you think this licence plate could be enhanced?
I have just a couple of snapshots of a car. The license plate is unreadable. I tried SuperResolution (on manually extracted and perspective corrected license plates), but it did not help much. Do you...
View ArticleQt + Android + OpenCV is possible?
Hello, I'm trying to build simple android application, what just take photo from camera using opencv. Application was built succesfull, but show me error when i try to run it on emulator or my phone....
View Articleopencv+qt+android
hey guys! could anybody give a step-by-step tutorial for setting up qt for building android applications using opencv? I have a qt and i can to create android projects. Also i have opencv, built for...
View ArticleAssigning OpenCV Mat object causes a memory leak
I want to assign frame (`Mat` object) from function parameter into object variable, as shown in the code below. But this function should be called may times (for each frame from the video camera). but...
View Articlevideocapture read constantly increased memory usage
Acquiring a jpeg from a IP camera, the following while statement causes unrestricted increase in memory with each iteration. Replacing the .read with .grab and .retrieve does not change the behaviour....
View ArticleStandard Deviation In Array OpenCV c++
Hello, I had save 5 data inside the array and will require this to be computed for the Std Dev. Does OpenCV has the library for the array calculation? Do I need to follow the [C++...
View ArticleTable Saw Reviews May Be The Dewalt Dw745 Table Saw The Top In Its Class
In most homes, the dining room table serves as the gathering place of the family. Therefore, it would be prudent to create certain your home is adequately sized to support your family and friends....
View ArticleSingle blob, multiple objects (Ideas on how to separate objects)
Hey friends I'm developing a object detection and tracking algorithm. The available CPU resources are low so I'm using simple blob analysis; no heavy tracking algorithms. The detection framework is...
View ArticleHow to calculate blurriness and sharpness of a given image?
Is there any function there in OpenCV to do it? If there is no function in OpenCV how can I implement it? any idea would be great.. The input will be an image and the output should be the blurriness...
View Articlecrop image
I am making AI application "criminal identification system" For validation I am putting condition that admin has to add image of criminal's face. That is properly done using opencv and only face images...
View ArticleOpencv 3.0 hog.cpp sample code crashing at gpu_hog->detectMultiScale(gpu_img,...
Hi there, I am running opencv 3.0's sample code hog.cpp for people detection, using the GPU. (the CPU part crashes for me). when I run the sample code, the code compiles, but when I run it, it crashes...
View Articlehuman detection from still camera
Dear all, I need to detect human silhouettes in a sequence provided by video-surveillance camera. The first step of my algorithm is motion detection based on background subtraction. I am done with...
View ArticleMost efficient format to save and load file
Hi all, I'm wondering if YML/XML is the most efficient format to save and load file in OpenCV. The situation is that I'm gonna have a really big SIFT features matrix (say, 10 million features, which...
View ArticleHelp with SIFT and SURF
Hello all, I'm using opencv with python on windows 7. I'm trying to use SIFT but as we all know it's been moved to the other repo. To set up opencv 3.0 all I had to do was copy cv2.pyd to my python...
View ArticleEssential matrix has limitations？the same focal length？
I am so sorry. I want to look for a new way to solve the five-points problem. I find Opencv has a function about it. But I don't kown how to use it. The findEssentialMat() is ok? but the function...
View Articlehow to get detector from trained svm classifier?
I have trained a classifer using *https://github.com/Itseez/opencv/blob/master/samples/cpp/train_HOG.cpp*. The number of positive samples is 48404 and negative samples is 46112. When I used this...
View ArticleReconstruct stitched image
Hello, I used OpencCV stitching class to stitch these images, but the result contain black area. I don't want to crop the image to remove the black area because some image details will be missed. Is...
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