Stack Overflow
Stack Overflow

Questions tagged [object-recognition]

The computer vision task of finding and identifying objects in an image or video sequence

The computer vision task of finding and identifying objects in an image or video sequence is often conducted consistent with one of two approaches:

  • Appearance-based methods

    • Use example images (called templates or exemplars) of the objects to perform recognition

    • Objects look different under varying conditions:

  • Feature-based method

    • a search is used to find feasible matches between object features and image features.

    • the primary constraint is that a single position of the object must account for all of the feasible matches.

http://en.wikipedia.org/wiki/Outline_of_object_recognition

316 questions
0
votes
1 answer

I want to use vlfeat for recognizing one class

I'm trying to use the vlfeat (matlab) example caltech101 for just one class but it doesn't seem to work. If I only feed one class to the svm trainer the results are 50/50. Should I take something else into account or is it that the one class svm…
paghdv
  • 554
  • 1
  • 4
  • 14
0
votes
0 answers

Opencv - can Fisherfaces or Eigenfaces be used to recognize non face objects?

I been experimenting with face recognition using the Fisherfaces algorithm as a model and wanted to see if the same could be applied to non face object. I see my app work as the following: create a set of images(Mats) of the the object and save…
user1310891
0
votes
1 answer

How to compute features using DAISY feature extractor?

I am wondering if somebody has used DAISY features for object recognition problems? Link to DAISY (MATLAB one) is: http://cvlab.epfl.ch/software/daisy My question is how to use this software (MATLAB) to get keypoints and their descriptors? I can…
Sanchit
  • 3,180
  • 8
  • 37
  • 53
0
votes
0 answers

OpenCV - Detecting Body Parts with Fixed Camera, Known Background, and Only 1 Human

I'd like to do identification and localization of body parts on some videos that I have. In this particular case, I know the following: The camera is totally fixed, so the background can be subtracted to identify the changes between frames. The…
Wesley Tansey
  • 4,555
  • 10
  • 42
  • 69
0
votes
1 answer

Find real position and size of blob in stereo image

Does anyone have any ideas of how I can find the size of a blob or object in a stereo image? I know that the stereo image outputs the depth information, but I want to know how large or high an detected object is. Say I find a bounding rectangle…
Jompa234
  • 1,228
  • 2
  • 14
  • 24
0
votes
1 answer

Number Recoginition Algorithm/Guideline in Image Processing

I am trying to learn image processing and i set myself an objective in that regard. A Number Recognition System. and so i took An Introduction to Digital Image Processing with Matlab by Alasdair McAndrew, and learned about things such as Edge…
Win Coder
  • 6,628
  • 11
  • 54
  • 81
0
votes
1 answer

error in miniflann.cpp using SURF descriptors

I have been working with Opencv for such time. This time, I faced a problem that irritated me so much. In fact, I have a template image and i want to use the matching to recognize it in my camera stream but I face such console error: OpenCV…
Houssam Badri
  • 2,441
  • 3
  • 29
  • 60
0
votes
1 answer

Cannot find a way to make tessnet2 work

I have created a console application. Added a reference to tessnet2_32. Ocr ocr = new Ocr(); using (Bitmap bmp = new Bitmap(filename)) { tessnet2.Tesseract tessocr = new tessnet2.Tesseract(); tessocr.Init(@"C:\temp\tessdata", "eng",…
Andrius Naruševičius
  • 8,348
  • 7
  • 49
  • 78
0
votes
2 answers

How to Train Single-Object Recognition?

I was thinking of doing a little project that involves recognizing simple two-dimensional objects using some kind of machine learning. I think it's better that I have each network devoted to recognizing only one type of object. So here are my two…
Paul Manta
  • 30,618
  • 31
  • 128
  • 208
0
votes
1 answer

Unhandled Exception in Object Recognition OpenCV

I am executing the code from the sample folder of OpenCV on object Detection. Below is the following code: 
#include "opencv2/objdetect/objdetect.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"

#include…
Rahul
  • 21
  • 7
0
votes
1 answer

how to proceed object recognition using edge detection and histogram processing techniques?

hello everyone i am pursuing mtech my project is object recognition to recognize specific objects such as weapons etc not allowed at airport so input will be scanned images of baggage/luggage in matlab for now its for static images only now i am…
Kavita Ahuja
  • 19
  • 1
  • 2
  • 10
0
votes
1 answer

Object pattern training and recognition (Image based)

Is there any c/c++ library for object pattern training and recognition? I need to implement feature and functionalities similar to what Google Goggles (http://www.google.com/mobile/goggles/#text) does
Ali
  • 935
  • 2
  • 9
  • 10
0
votes
1 answer

Extracting an object from a low contrast background

I need to extract an object from an image where the background is almost flat... Consider for example a book over a big white desktop.. I need to get the coordinates of the 4 corners of the book to extract a ROI. Which technique using OpenCV would…
anon
0
votes
2 answers

Extraction key frames from a video for scoring a video with some queries

I am workin' on a Computer Vision project that we need to score videos according to inclusion of some objects, animals or such defined by queries. But for this mission we firstly aim to retrieve some key frames form the video to process with. Do you…
Eren Golge
  • 802
  • 2
  • 12
  • 27
0
votes
1 answer

Object recognition by edge (or corners) matching?

I would like to develop, for academic purpouse, an object recognition system that uses (among other things) edges or corners matching. Basically I extract corner information on my model image then i try to find this object inside a query image using…
anon
1 2 3
…
21 22