The Secret of Website design as well as Its Different Facets
Website design just suggests preparing, designing and also developing a site. It additionally entails website structure and also format, info architecture, different colors, contrast, images as well as...
View ArticleCascade training failed OpenCV 2.4.9.1
I'm trying to train a cascade database with 41 positive images and 500 negative images (as a trail) Here are my steps **pos.info -** pos/pos-001.pgm 1 0 0 100 40 pos/pos-002.pgm 1 0 0 100 40...
View ArticleIdeal camera placement for vehicle detection
Hello, I'm working on a vehicle detection project and for demo purpose, we're going to install a camera outside the building, aside the road. I was wondering if there is a standard, or best practice on...
View ArticleTemplate matching optimization (matchTemplate)
I'm writing an algorithm that uses **template matching** function provided by OpenCV. I'm interested in normalized cross-correlation (NCC) method. I noticed that the performance of the OpenCV algorithm...
View ArticleWhy are Matx, Vec, Point and Size different types?
In every program I code, sooner or later I bump up into one of these conversions: - `Matx_` <-> `Vec_` - `Point_` <-> `Vec_` - `Point3_` <-> `Vec_` ...or operations like - `Size_ +...
View ArticleDescription of this code for Grayscale Images
It is my first project on the Image recognition and my question might be bit silly for the experienced users in this field. I came to know that the Grayscale Images are used for Image recognition as it...
View ArticleHow to save a video in mp4 format
Currently I am saving my video using VideoWriter oVideoWriter0(/home/MyVideo0.mp4", CV_FOURCC('M','P','4','2'), 20, frameSize); But when I run the code (in C++) I am getting error message as [mp4 @...
View ArticleTBB parallel_for vs std::thread
Hi, I'm starting with parallel processing in OpenCV an wonder why I should use `parallel_for` (from TBB) instead of just using multiple `std::thread`s. As I understood the...
View ArticleChanging OPENCV camera view orientation on androi
I have been struggling to change the orientation of the OPENCV on my android 4.4.2 OS version. It is appearing in the landscape mode. Looks exactly like: I...
View ArticleOpenCV4Android 3 with extra modules for 32 and 64 bit
Hey there, I´m trying to compile an application with OpenCV 3 on various Android devices. I wanna use Nexus 5, 7 -> 32 bit and also Pixel C and Nexus 6p -> 64 bit. There are two problems: 1....
View ArticleError using setSVMDetector of HOGDescriptor
Hi everyone, I'm new using HOGDescriptor, and I find out as long as the code runs to this line: hog.setSVMDetector(HOGDescriptor::getDefaultPeopleDetector()); there code will be interrupted and show...
View ArticleCloud Identification and Tracking
Hi, I'm working on sky images and I can detect cloud areas per frame. Then now I want to calculate movement vector for once identified clouds but as you guess, shapes of clouds changes frame by frame...
View ArticleNormal bayes classifier taking long to train Opencv C++
I am training normal bayes classifier using opencv 3.1.0 C++ to classify face images. I am passing a floating point matrix as classification data and a matrix of integers as labels (responses). Opencv...
View ArticleOrientation of camera to by analyzing its perspective distortion
I want to find thee orientation of the camera in relation to a image for ex(QR code Image) by analyzing its perspective distortion.Can anybody suggest me how to do this? I am able to detect the QR...
View ArticleData is not inserted into the database ..
when i'm trying to inserting my data into my database the data in not inserted is der any prblm ?? code: try { String name=jTextField1.getText(); String stream=jTextField2.getText(); String classes=...
View ArticleImage Recognition using edge detection?
I am trying to implement some kind of logo recognition for books. My ultimate task is to take a picture of 4-5 of these logos on books and to be able to recognize them. The logos look like:...
View Articlemake white background of image transparent using android
I am trying to take an image from drawable and make it's white background transparent Thank you!
View ArticleGet skeleton from distance transform
Hello, I know it is possible to get the skeleton of a shape in an image from either successive morphological operations or distanceTransform. I can do this via morphological operations. But How do I...
View ArticleHow do I know exactly when motion is detecected? Optical Flow
I am using the calcOpticalFlowFarneback algorithm to detect motion and to draw the movement in the image. I have about 40 cameras and all is well. With the example code, drawing is not the issue. But...
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