When finding a reference image in a scene using SURF, I would like to crop the found object in the scene, and "straighten" it back using warpPerspective and the reversed homography matrix...

[Request you to read question details before marking it duplicate or down-voting it. I have searched thoroughly and couldn't find a solution and hence posting the question here.] I am trying to co...

I am learning OpenCV and have started exploring the SURF Algorithm for image matching. I have created a sample image library by modifying the default images available with Microsoft Windows 7. Ea...

I want to do a 3-d plot with mayavi2 using mayavi.mlab.surf(). This function has an argument called warp_scale that can be used to scale the z axis, I'm looking for something similar but for the x ...

I am currently working on a project which we have a set of photos of trucks going by a camera. I need to detect what type of truck it is (how many wheels it has). So I am using EMGU to try to detec...

I want to compute SURF Features from keypoints that I specify. I am using the Python wrapper of OpenCV. The following is the code I am trying to use, but I cannot find a working example anywhere. ...

I'm working on a OpenCV project using surf to detect feature from images. The detector is initialized in this way int minHessian = 100; SurfFeatureDetector detector( minHessian ); Can someone e...

I have a simple question, which I want to know, what kind of libraries are available and can give good results for implementing SIFT, HOG(Histogram Oriented Gradient) and SURF in c++ or opencv? He...

Currently I am working on face recognition project where I am using Fisherfaces/LDA to filter out the images on a broader level and then using SURF to verify the output from LDA. What would be a go...

There are some topics here that are very helpful on how to find similar pictures. What I want to do is to get a fingerprint of a picture and find the same picture on different photos taken by a di...

I'm new to emgu and would like some advice on where to start. I've looked through the shape detection but its far too complex for what i need .. i think.. and my surfexample isn't working. I...

I'm trying to understand the difference between the FeatureDetector class and the FeatureFinder class. I've seen panorama examples written in OpenCV use both of these classes and it appears to be p...

I have been working with the SURF feature detection example from the EMGU CV library. So far it's working amazingly; I can detect matching objects between 2 given images but I have run into a prob...

I want to recognize Vehicles(Cars, Bikes etc.) from a static image. I was thinking of using SURF to get me useful keypoints and descriptors and then train a MLP(Multi Layer Perceptron) Neural Netwo...

I have a question about objects matching with OpenCV. I'm useing SURF algorithm implemented in opencv 2.3 to first detect features on each image, and then extracting the descriptors of these featur...

[EDIT] I have devised some code for image comparison. The matching part is still a bit flawed and I would love some assitance. The project can be found at - GitHub. I have these two images Img1 an...

I know semilogx and semilogy for 2D plots. There is any equivalent for SURF and MESH?

I am trying to detect the objects in an image which look similar to the reference image. Here is how i'm trying to accomplish it: Here is the sample Image: and here is the image with SURF keypo...

I'm trying to use OpenCV to extract SURF descriptors from an image. I'm using OpenCV 2.4 and Python 2.7, but am struggling to find any documentation that provides any information about how to use t...

I'm trying the assess the correctness of my SURF descriptor implementation with the de facto standard framework by Mikolajczyk et. al. I'm using OpenCV to detect and describe SURF features, and use...

I'm stuck on this one. I am trying to do some object classification through OpenCV feature 2d framework, but am running into troubles on training my SVM. I am able to extract vocabularies and cl...

I'm trying to get started working with sift feature extraction using (C++) OpenCv. I need to extract features using SIFT, match them between the original image (e.g. a book) and a scene, and after ...

How to draw a Geosphere in matlab? By Geosphere I mean the way of discretization points on a sphere (Geosphere is, for example in 3Ds Max). On the image below, it is shown Sphere (on the left) a...

I have recently been working on a solution to an object-tracking problem. What I need to do is identify and track 3D-objects that may move on a 2D-plane, i.e. translation in x and y, and rotation a...

I am reading lot of post for object detection using feature extraction (sift ecc). After having calculate descriptors on both images, to get good matches they are using crossCheckMatching. (found ...