surf Questions
4
Solved
I was trying a code for feature matching which uses the function SURF(). Upon execution it gives an error saying "AttributeError: 'module' object has no attribute 'SURF'".
How can I download this ...
22
Solved
I'm trying a simple thing like
detector = cv2.SIFT()
and get this bad error
detector = cv2.SIFT()
AttributeError: 'module' object has no attribute 'SIFT'
I do not understand that because cv2 ...
5
Solved
I am using SURF descriptors for image matching. I am planning to match a given image to a database of images.
import cv2
import numpy as np
surf = cv2.xfeatures2d.SURF_create(400)
img1 = cv2.imre...
1
I try to use the SIFT and SURF function with some of the versions of OpenCV 3 and openCV 4 (after having installed opencv-contrib-python) with:
pip install opencv-contrib-python
i try versio...
Herne asked 25/10, 2020 at 14:55
3
Solved
I've installed OpenCV on ubuntu using this link and I'm trying to use SURF descriptor. I knew that they changed the location of these type of descriptors to the nonfree module so we need to include...
2
I'm trying to use Keras with TensorFlow to train a network based on the SURF features that I obtained from several images. I have all this features stored in a CSV file that has the following colum...
Shandishandie asked 24/7, 2019 at 19:34
2
Solved
I have built the openCV 3.0 alpha version from source with support for CUDA and TBB. Now, I want to do feature detection and feature matching using SURF algorithm. SurfFeatureDetector is present in...
4
Solved
I am trying to use FLANN with ORB descriptors, but opencv crashes with this simple code:
vector<vector<KeyPoint> > dbKeypoints;
vector<Mat> dbDescriptors;
vector<Mat> objec...
1
I'm trying to use OpenCV to detect and extract ORB features from images.
However, the images I'm getting are not normalized (different size, different resolutions, etc...).
I was wondering if I n...
3
Solved
I have this function in C++ using OpenCV:
vector<KeyPoint> test(Mat img)
{
int minHessian = 400;
SurfFeatureDetector detector( minHessian );
vector<KeyPoint> vKeypoints;
detector....
Drugge asked 21/1, 2014 at 15:2
1
Solved
I am using following code for matching surf features of the two images but unable to crop and align the image.
The original image，the rotated image and matched image are as follow.
I want to s...
3
Solved
I want to limit a SurfFeatureDetector to a set of regions (mask). For a test I define only a single mask:
Mat srcImage; //RGB source image
Mat mask = Mat::zeros(srcImage.size(), srcImage.type());
...
Pearliepearline asked 3/5, 2013 at 18:10
2
Solved
I am trying to add a secondary y-axis with different units to a 3D plot.
[m2_array, ~ , ~] = F_readBin('amb.bin');
amb = m2_array(:,:,lat);
surfc(light,'LineWidth',0.001);
ylim([1 24]); xlim([...
6
Solved
I am testing some object detection with SURF and SIFT.
SURF claims to be faster and more robust than SIFT but I found in my test that this is not true. SIFT with medium images (600*400) is the sam...
2
SURF by default works on Gray image. I am thinking to do SURF on HSV image. My method is to separate the channels into H, S and V. And I use S and V for keypoint detection. I tried to compare the n...
1
Solved
I'm make a filled contour or surface plot from a scattered dataset.
A major difference from other Qs is that the data are not convex.
[r,th] = meshgrid(10:15,0:180);
[x,y] = deal(r.*sind(th), r....
Welterweight asked 30/3, 2017 at 18:16
2
I am using the SURF algorithm in C# (OpenSurf) to get a list of interest points from an image. Each of these interest points contains a vector of descriptors , an x coordinate (int), an y coordinat...
Oran asked 24/11, 2011 at 9:49
2
Solved
I wrote a little script which let to find an object in a global picture by the SIFT descriptors method. But I have a question about multiple detections in the same picture.
I have this global pic...
Diminished asked 15/12, 2016 at 9:32
1
Solved
I have been trying to use the EMGU Example SURFFeature to determine if an image is in a collection of images. But I am having problems understanding how to determine if a match was found.
...........
2
I'm reading a lot about vocabulary trees when it comes to fast queries for similar images or texts in big databases. But I couldn't find any good (easy to understand) description on what such a voc...
Parasiticide asked 30/1, 2010 at 23:23
1
Solved
I have shifted from OpenCV 2.4.9 to 3.0 to make use of drawMatches and drawMatchesKnn function. I came to know that it does not come along with non-free algorithms like SIFT , SURF. So I installed ...
2
Solved
When using OpenCV for example, algorithms like SIFT or SURF are often used to detect keypoints. My question is what actually are these keypoints?
I understand that they are some kind of "points o...
Shoal asked 18/3, 2015 at 21:30
3
Solved
I am implementing stereo matching and as preprocessing I am trying to rectify images without camera calibration.
I am using surf detector to detect and match features on images and try to align the...
Amitie asked 4/2, 2014 at 22:10
7
Solved
I'm making a program in C++ that uses 2 images to detect SURF Features, compute the matches with a bruteforcematcher and draws it.
Here's the code
#include <cstdio>
#include <string>
...
Loculus asked 1/4, 2012 at 22:42
4
Solved
When I try to run the sample find_obj.cpp or any OpenCV SURF program I get the following error in command prompt while executing the code. The project builds without errors and warnings. I am using...
Carious asked 24/6, 2012 at 7:37
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