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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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The steps to do object detection in natural image?

I am new to computer vision, can anyone tell me the steps to do object detection in natural image? (Here object refers to logo). I drafted the following steps based on my own understanding: Problem statement: Suppose there are 20 reference logos,…
kim
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Image Vectorizer

I'm looking for a library/tool/image processing technique which can create vectors out of images (similar to text vectorization like TFIDF or so). Can anybody share some ideas how to proceed?
rusho1234
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How to improve SIFT matching with RANSAC between two images, OpenCV

I want to do the matching between images, I have used SIFT as the feature and use RANSAC for improve the matching. Some results are good, but some failed. Can anyone tell me how to improve it? I think my implementation should be right as I got some…
kim
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Foreground detection without an image sequence

I need to detect the foreground object on an image and cut it off from that image. There are lots of background/foreground subtraction or object recognition algorithms but these algorithms are working on the videos or image sequences. I have only an…
Erdi İzgi
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Image matching and object detection, how to perform detection for small object?

I am using SIFT feature the matching between two images or it can be considered as object detection. First matching. I used SIFT feature for matching and it failed when the object is small. Second matching. However, it woks when I cropped that…
Fiong
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what most candidate Features could you find for Buildings

I'm planing to make android app the need of it is to recognize building in the city . I need help in choose the most important unique features in the buildings ,such that the size of the features stay small as it will not be a practical application…
Abo gaseem
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Neural network topology for object recognition on aerial photos (computer vision)

My objective is to recognize the footprints of buildings on aerial photos. Having heard about recent progress in machine vision (ImageNet Large Scale Visual Recognition Challenges) I though I could (at least) try to use neural networks for this…
Konrad N
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template matching? object recoginition and feature matching or what is the solution?

Problem: I have a photo of an object (a manufactured part like the attached photo below), using my Andoird phone camera I want to verify if the object in camera preview matches to the template or not. (in other words, is it the same part as the…
Asha
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Can Hadoop reduce runtime of SIFT?

Can we use hadoop to run SIFT on multiple images? SIFT takes ~ 1s on each image to extract keypoints and its descriptors. Considering that each run is independent of others and runtime of 1 run cannot be reduced, can we reduce runtime…
Ankit Nayan
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How to determinate object position with openCV in the world coordinate

I'm trying to implement a task for the robotic class of my university. The main task of the project it's to grasp a cup with the KUKA-youbot robot. The main problem that i found it's about the part of vision computing of the project. More precisely,…
luke88
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iOS Use OpenCV to recognise a building

I'm wondering if it is possible to use the OpenCV framework to recognise a building? For example, if I store an image of a building, is it possible to use OpenCV to detect this building through the iPhone camera? Thanks!
David Cahill
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Markers with good features for recognizing multiple objects

I am trying to localize an object by recognizing a marker the object carries on the image from the camera. I am currently using ORB feature detector (that is, pyramidal FAST detector) along with BRISK descriptors. I should properly recognize 12-16…
Damjan Dakic
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How to test own image in geoff hinton's deep neural network?

Here is the link for Geoff Hinton's Matlab code. He has made this code for handwriting recognition. I want an object recognition code, so I want to train it with my own image. I am doing it by making few changes (loading my own image data-sets…
himanshu1496
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using HAAR training for post-it note recognition

I need to be able to detect a variety of coloured post-it notes via a Microsoft Kinect video stream. I have tried using Emgucv for edge detection but it doesn't seem to locate the vertices/edges and also colour segmentation/detection however…
deez22
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get max and min depth from Kinect

My Kinect will be mounted on the ceiling looking downwards directly to the ground (should be paralell to ground). For object recognition i want to get the distance to the ground(maxDistance) and the distance to the object (minDistance). I wrote a…
Nikolas Rieble
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