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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

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Extracting HoG Features using OpenCV

I am trying to extract features using OpenCV's HoG API, however I can't seem to find the API that allow me to do that. What I am trying to do is to extract features using HoG from all my dataset (a set number of positive and negative images), then…
sub_o
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Where do I start learning about image processing and object recognition?

I'm interested in writing some basic computerized object recognition application, so I figure I need some theoretical background in image processing algorithms, along with some AI for decision making capabilities. I'm a computer science graduate,…
Yuval
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SVM classifier based on HOG features for "object detection" in OpenCV

I have a project, which I want to detect objects in the images; my aim is to use HOG features. By using OpenCV SVM implementation , I could find the code for detecting people, and I read some papers about tuning the parameters in order to detect…
Mario
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specific Object / Image detection from app locally, without internet

My requirement is to scan a fixed object. After recognizing that, I want to highlight the object and to display corresponding pre-feeded parameters accordingly, like height, width, circumference, etc. This all, I want to do, without internet, using…
Narendra Singh
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Bag of words training and testing opencv, matlab

I'm implementing Bag Of Words in opencv by using SIFT features in order to make a classification for a specific dataset. So far, I have been apple to cluster the descriptors and generate the vocabulary. As I know, I have to train SVM ... but i have…
Mario
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OpenCV Contours Moments?

What are moments of a contour? Could someone explain this in simplistic, non-mathematical terms? Possibly with an example? The official explanation is "integration over all the pixels in a contour". I have no idea what integration. And also what can…
fdh
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Finding distance from camera to object of known size

I am trying to write a program using opencv to calculate the distance from a webcam to a one inch white sphere. I feel like this should be pretty easy, but for whatever reason I'm drawing a blank. Thanks for the help ahead of time.
David Harbage
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best tool for object recognition

i want to do a small project on object recognition, any any tools or literature suggestions on this topic ?
dinsim
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Object detection for specific flat objects

I'm new to computer vision, and I want to detect specific and flat objects in an image (or video frame). What do I mean with specific and flat? Flat Well, flat objects are like objects, but, you know, flat... What it means to me: Objects will…
Gohu
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Making a trained model (machine learning) from 3D models

i have a database with almost 20k 3D files, they are drawings from machine parts designed in a CAD software (solid works). Im trying to build a trained model from all of this 3D models, so i can build a 3D object Recognition App when someone can…
Pablo L
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Fastest moving object recognition and tracking in Android

I am working on an augment reality game, which need to recognize and track a fast moving object. I have tried the following Image processing libraries, 1. Opencv 2. BoofCv 3. FastCv I have tried TLD algorithm to track the object, tracking was…
Sujith
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Match 3D point cloud to CAD model

I have a point cloud of an object, obtained with a laser scanner, and a CAD surface model of that object. How can I match the point cloud to the surface, to obtain the translation and rotation between cloud and model? I suppose I could sample the…
HugoRune
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OpenCV for ANDROID image compare

I want to develop app which will recognize object(like monument or something) present in front of camera using OpenCv and then it will show information about it. So the question is how to recognize object(like monument or something) shape or…
J1and1
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Image recognition for Android augmented reality app

First, sorry abour my poor english. I'm planning to build an augmented reality app for android mobile platform and the main feature is the ability of the user to take a shoot of a shop and the application recognize the shop that he is photographing.…
Vinicius Souza
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How to integrate face and objects recognition using ip cameras?

Setting a stage, in a district there are 200 + analog cameras to a central monitoring station, but these cameras do not have recognition of faces or objects. Is it possible to implement face detection to these cameras? Are there any prerequisites…
José C. Arbildo López
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