CvVideoWriter get current fourcc
Using class `cv::VideoWriter` I can specify `CV_FOURCC_PROMPT` (which is -1) as `fourcc` parameter in constructor or its `open` function, in which case "Open Codec Selection Dialog" will be opened and...
View ArticleOpenCV 3.1 Java problem with rtsp
Hello, I am starting to use OpenV with Java. I have written an app to capture video from my usb cam and wanted to test it for a web camera using a rstp address. I can use the rstp with VLC player so I...
View ArticleCan Haar cascade or LBP cascade classifier detect paper bill of different...
I am currently working on a project which entails banknote detection before recognition. in order to assist the blind in taking photos of the banknote or paper bills.
View ArticleHaartraining vs Traincascade : Object Detection
Hello! I wanted to do an app that was able, through a picture, to recognize staplers. I've done a quick search and i went with Haartraining. (Not sure if it was the right choice! Comments?) The thing...
View ArticleRegarding scaling of intrinsic parameters of camera
I want to ask something regarding the intrinsic parameters of a camera. So, we know that from calibration, we can find out the `fx`, `fy`, `cx`, `cy` and the distortion coefficients of the camera. From...
View Articlexamarin and opencv
Can i include opencv library into a native application using xamarin or anything else ? i just wanna create a native app that uses opencv. Thanks in advance.
View ArticleOpenCV superpixels - How to reorganize data into a 2D array ?
I am working on a school project on image segmentation and object recognition and am trying out conditional / markov random fields on superpixels....
View ArticleClarification about incorrect image matching points in SIFT
I detected sift key points of two images. (two images have the same scene, but different view angle) after that I did matching of key points. To remove the bad matching I used RANSAC. Most of the...
View Articlehow to include libjpeg in OpenCV 3.1 Android
with openCV 2.4.X I had no problem using turbo-libjpeg I've used the library as shared library: Android.mk includes- LOCAL_C_INCLUDES += ../../libjpeg-turbo and include $(BUILD_SHARED_LIBRARY) when I...
View ArticleSuggest a method for detecting & tracking irregular polygon
hello i want **detect & track Irregular polygon** in this picture(one frame of video). **please Suggest a method for detecting & tracking irregular polygon. And How to get the coordinates of...
View ArticleCV_8UC3 returns grayscale
Excuse me, I'm new to opencv. I learned about CV_8UC3 that it defines an image in 8 bit unsigned integers using 3 channels (BGR). When a color image is loaded using this constant as parameter, cv::Mat...
View ArticleProcess image coming from a OpenGL rendering context
Hi all! I have an image coming from an OpenGL rendering context:  We have alpha background both inside and outside the black contour....
View Articlehow to match paper sheet by opencv
I have some kinds of paper sheet and I am writing python script with opencv to recognize the same paper sheet to classify. I am stuck in how to find the same kind of paper sheet. For example, I...
View ArticleCmake cannot configure using 64 bit Visual Studio
I am setting up OpenCV on a different computer and I come across a problem with Cmake giving me an error if i select VS community 2015 Win 64 as my compiler. Everything seems okay when I Cmake and...
View ArticleStereo camera calibration gives bad rms error
I am trying to calibrate my homemade stereo camera. I used sample code provided by OpenCV (stereo_calib.cpp). I use 30 pairs of chessboard images. Code can find inner corners. At the end i have RMS...
View ArticleInterlacing issue with HDMI capture using Avermedia ExtremeCAP U3
Hi I'm using a basic color filtering example (pasted at the bottom) I'm using a GoPro Hero 4 silver, and to capture the video in real time I have it connected by HDMI to an AverMedia ExtremeCap U3...
View ArticleNothrow move constructors for Point, Size, Point3, Rect
The static asserts currently fail with opencv-3.0.0 with gcc (GCC) 5.1.1 20150618 (Red Hat 5.1.1-4) #include // for is_nothrow_move_constructible #include // for vector #include...
View ArticlechamerMatching malloc error
I am having an error trying to do chamfer matching. Somewhere within the call to chamerMatching, I get the error:> malloc: *** error for object 0x104044000: pointer being freed was not allocated ***...
View ArticleImproving face recognition accuracy
I'm working on a Face Recognition program using `Opencv 3.1` with `Python 3` on `Linux` and I'm trying to increase recognition accuracy as much as I can. **My issue:** The confidence values between...
View ArticleMobile Strike IOS Android Idea To Get Free Gold.
Mobile Strike is an appealing present day dry run which enables our customers analyze your troops against different foes on the arena while managing the activity and to create a base. An examine the...
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