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Questions tagged [pattern-recognition]

Pattern recognition is the term given to the science of automating the classification of input into pre-determined categories, or on the other hand, of being able to recognise particular categories of input by their characteristics.

Pattern recognition is the assignment of a label to a given input value. It is a kind of classification task, such that an input is classified to pre-trained class. Pattern recognition is studied in many fields, including psychology, psychiatry, ethology, cognitive science, traffic flow and computer science.

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Detecting an object on the image based on geometrical form

I have a basic understanding in image processing and now studying in-depth the "Digital Image Processing" book by Gonzales. When image given and object of interest approximated form is known (e.g. circle, triangle), what is the best algorithm /…
bob27
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Image Processing - Using Radon Transform for Pattern Recognition in MATLAB

I am attempting to extract the Radon Signature in order to recognize patterns of clothing (striped,plaid, irregular and patternless) as done in 1. Algorithm to be implemented : 1. Use sobel operator to compute the gradient map as f(x,y). 2.…
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White blob detection

I'm trying to use AForge.NET to detect a thick white line across an Image. It's like pipe that I get and is my desired result after applying a Threshold filter. I know how to detect shapes and I'm doing that, already, but this doesn't match under…
bbedward
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Looking for an Image Comparison/Pattern Recognition Library

The end goal would be to see if contains . the compare needs to support minor distortion, scaling, color differences, rotation, and brightness differences. it can be in any language really. i will be running this algorithm as a webservice so its…
josh
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Can a perceptron be used to detect hand-written digits?

Let's say I have a small bitmap which contains a single digit (0..9) in hand writing. Is it possible to detect the digit using a (two-layered) perceptron? Are there other possibilities to detect single digits from bitmaps besides using neural nets?
Daniel Rikowski
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Pattern recognition algorithms

In the past I had to develop a program which acted as a rule evaluator. You had an antecedent and some consecuents (actions) so if the antecedent evaled to true the actions where performed. At that time I used a modified version of the RETE…
Jorge Córdoba
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Where can I find facial detection software, algorithms, etc?

I'm interested in writing software that depends on being able to identify that there is a face in a picture (or video frame). It doesn't have to ID the face - so no metrics other than: Is there a human face in the picture (or more than one) Where,…
Adam Davis
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Real-time identification of non-speech, non-music sound from a continuous microphone stream

I'm looking to log events corresponding to a specific sound, such as a car door slamming, or perhaps a toaster ejecting toast. The system needs to be more sophisticated than a "loud noise detector"; it needs to be able to distinguish that specific…
kostmo
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How to go about searching for a player models in COD with OpenCV

I am attempting to create a program that can find human figures in video of game play of call of duty. I have compiled a list of ~2200 separate images from this video that either contain a human figure or do not. I have then attempted to train a…
Nick Banks
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Python string pattern recognition/compression

I can do basic regex alright, but this is slightly different, namely I don't know what the pattern is going to be. For example, I have a list of similar strings: lst = ['asometxt0moretxt', 'bsometxt1moretxt', 'aasometxt10moretxt',…
iCy
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How to OCR engraved text?

I have this image How to OCR it? I know this is very challenging, but I would really appreciate any help.
Zaher Joukhadar
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How to search for famous logo in scanned image?

I have following scanned document, with the logo on it, and I have another black and white image with same logo and style (Shown in black and white color below). How do I make sure that the logo is present on this image or not? Usually I will have…
Akash Kava
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Which algorithm I can use to find common adjacent words/ pattern recognition?

I have a big table in my database with a lot of words from various texts in the text order. I want to find the number of times/frequency that some set of words appears together. Example: Supposing I have this 4 words in many texts: United | States |…
Renato Dinhani
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MATLAB fitcSVM weight vector

I am training a linear SVM classifier with the fitcsvm function in MATLAB: cvFolds = crossvalind('Kfold', labels, nrFolds); for i = 1:nrFolds % iterate through each fold testIdx = (cvFolds == i); …
Pugl
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C5 algorithm implementation?

Do you know where can I find some information of this algorithm, to study it??. Is there already an example of its implementation, or, only Quinlan knows its implementation??
edgarmtze
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