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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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Official tensorflow tutorial: Input pipeline in retraining using transfer learning (retrain.py)

I want to use transfer learning with Google's Inception network for an image recognition problem. I am using retrain.py from the TensorFlow example source for inspiration and follow this official tutorial from Google. However, its input pipeline …
Tuan-Anh NGUYEN
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3D object recognition: Deep Learning VS Descriptors

Is the arrival of Deep Learning methodes (Pang, Neumann. 2016) (Su, Maji. 2016) the end of Descriptors methodes (FPFH, SHOT, Spin Image, ...)? Can we consider Descriptor as obsolets techniques? or is there a case where they are the only or the…
Daniel Amaya
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Confidence Bag of Visual Words Python OpenCV

I have a simple bag of visual words script that I am attempting to use and learn more about. I am trying to learn what to do with images that are different from my trained class. Currently it puts every image into a class. I understand that is how…
J. Ray
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OpenCV coordinates conversion

I want to ask a question that initially seemed to me quite simple, but in the end it turned out that it's difficult to do. The question is: how to translate the coordinates of OpenCV point into Unity coordinates (Vector2). I have a video from the…
Алексей Волович
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How to compare if two images representing the same object if the pictures of the object belongs from two different sources - in OpenCV?

Suppose I have an image of a car taken from my mobile camera and I have another image of the same car taken downloaded from the internet. (For simplicity please assume that both the images contain the same side view projection of the same car.) How…
Neelesh
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Whats the simplest way to do object recognition?

Given that I have harris corner detection and canny edge detection working, what is the simplest way to determine whether two images have corresponding edges or shape? The use case intended would be to classify really simple shapes and objects like…
John Lag
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Python - Image recognition classifier

I want to evaluate if an event is happening in my screen, every time it happens a particular box/image shows up in a screen region with very similar structure. I have collected a bunch of 84x94 .png RGB images from that screen region and I'd like to…
EduGord
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Mask Objects in Depth Map

i'm am currently trying out object recognition using surface matching using Point Pair Features, based on [1]. Furthermore in [2] already recognized objects are masked out of the depth map, to allow easier detection of occluded objects. The Object…
Sparkas
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OpenCV in Android for Object Recognition

I'm new in OpenCV or Image Processing and looking forward for any opinions from who has more experienced in this field. So in my problem, my target is to recognized some specific object. Let's say it is a drink can. Here are my approach for the…
Lyn
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Recognition of circular objects with OpenCV

I want to find circular objects in an image like In this image there are six different dishes that I want to recognize. To do this, first I detect the edges with: edges = cv2.Canny(img2, 150, 130) Then I find circular patterns in this new image…
Davide Biraghi
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How to get pixel matrix of recognized objects when classifying a image using Tensorflow?

I want to get pixel matrix of objects within a image when the image is classified by Tensorflow (classify_image.py). In other words, the recognized objects must be segmented first. E.g. there is a computer in the picture, i want to get all pixels…
user275403
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Object Classification, when to use full image or extracted object?

I'm trying to set up an object classification system with OpenCV. When I detect a new object in a scene, I want to know if the new object belongs to a known object class (is it a box, a bottel, something unknown, etc.). My steps so far: Cutting…
Oronar
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Recognizing correct brand image in scene with SURF method from brand images list

Firstly i want to explain my problem with more detail; 1- I have many company brand(logo) image and I have one input which is a document image possibly from those companies. 2- I want to recognize that document image from logo. For this aim i tried…
Eren V.
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Building Meter Maid Dectector... Best OpenCV Method for Florescent Vest Recognition

I work for a small startup downtown. We don’t have any designated parking, just street parking with meters. This can be quite an annoying situation and my coworkers and I end up getting a lot of tickets. So I want to build a meter maid detector. …
Nate
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How to convert the depth data from a Kinect 2.0 to a distance value?

I would like to take advantage from the depth sensor of the Kinect 2.0 SDK, but not in the sense that this data is drawn or displayed in the format of an image but rather an integer or something alike. An example of that is if I have my hand very…
user1680944
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