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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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Integrating Object Recognition into iOS app

We currently have a native iOS app written in obj-c. Just wondering if anyone has any advice/experience on integrating Object recognition functionality into the app. The basic description of what want to allow our user to do is to click on a button…
Matt
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Accelerate DetectMultiScale fucnction to detect objects from loaded videos in real time

I could generate Haar cascade classifier detecting traffic signs. When I use it with frames from webcam (1.3MP) it works pretty well in real time, but when I try to detect signs from video of mp4 format taken to phone camera (8MP), function…
Azik
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Does google prediction api work for image recogniton

I read the official documentation for the api, but I wanted to make sure that it's possible for it to perform object recognition in images. More specifically, my idea is to provide a lot of images of parking lots with the number of parking spots…
niko
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How to visualize the visual words from a bag of features classifier in MATLAB?

I am using bag of features to classify histology images in MATLAB. here is the code that I used. It's taken from the `imageCategoryClassificationExample Location of the compressed data…
spacebar
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Draw Contours in opencv around recognized polygon

I am working on OpenCV-Python. I have a image like this(bellow image,but without light green lines) from live feed by webcam.I have found corners coordinates, (array([[[280, 109]], [[162, 206]], [[189, 341]], [[329, 389]], [[444,…
user_fs10
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best approach for template matching of binary (edge) images

To all skimage and opencv gurus, given: Scene Image Template Image What is the best approach to find the cross in the scene image ? These are output from smoothing, and canny filters. Now, I tried all kinds of examples in skimage, and opencv…
user1301295
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Missing ecto_image_pipeline

I am trying to run object recognition kitchen adn to do mesh_object but when I run rosrun object_recognition_reconstruction mesh_object --all --visualize --commit I get this: import ecto_image_pipeline.conversion ImportError: No module named…
sykatch
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what is the best background subtraction algorithm for detecting vehicles in road traffic jam?

My problem is detecting vehicles. The camera is on traffic light stand facing downward with some degree. The problem is luminance, as the sun changes its position. So what background subtraction algorithm is robust for this situation? I only know…
Amanuel Negash
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How to calculate performance of your object recognition algorithm and compare results with others?

I am working on a novel object recognition algorithm with BoF implementation for my MSc project and it performs fairly well. I am using it on Caltech101 dataset. I want to compare the results with other techniques, like SIFT, SURF, PHOW and so on.…
SidMMXI
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How to identify an object inside the image with x,y coordinates and the size of the object using php?

I want to identify an object inside the image. For example, according to the below tshirt image I want to identify the smiley face with the x,y coordinates of its starting position and the width & height properties of that smiley image. How can I do…
user3894236
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extracting haar features from images

I am attempting product classification based on image processing. I will have (say 10000) images of, say 5, different types of object and my system will segregate those. As a solution, I am trying to extract select haar features and the location on…
Anurag Priyadarshi
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Using SIFT and OpenCV for object recognition

I have an image that is an image of one of a set of objects, and I'd like to use SIFT in Open CV to figure out which object it. I have this code: Mat pic = imread(...); vector picKP; Mac picDesc; Mat obj1 = imread(...); Mat obj2 =…
Drew
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Detecting an objects position and direction inside an image

I am trying to gather a position and a direction of an object inside an image. The image can look like this for example: https://i.stack.imgur.com/4ehUy.jpg The object is shown as a blue circle. What I've tried so far is using a basic pixel search,…
user4653488
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How we can implement object recognition in real time through Augmented Reality way?

I need to implement image recognition in real time. So I have tried metaio SDK for Augmented reality. In Metaio SDK I have used extended image tracking. But through that, only one image and text to that image can be added in static. So that if I…
lakshmi
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Count the amount of closed contours in an image - MATLAB

I am struggling to find a good contour detection function that would count the number of contour in bw images that I have processed using some previous tools. As you can see, my profile picture is an example of such images, , In this image,…
GUY TALMOR
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