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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.

See also:

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matching jigsaw puzzle pieces

I have nothing useful to do and was playing with jigsaw puzzle like this: alt text http://manual.gimp.org/nl/images/filters/examples/render-taj-jigsaw.jpg and I was wondering if it'd be possible to make a program that assists me in putting it…
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Rotation and scale invariant template matching in OpenCV

Possible Duplicate: scale and rotation Template matching I have a template grayscale image , with white background and black shape over it. I also have several similar test images which vary in rotation and in shape. The test images are not same…
rajat
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position recognition of simple fiducial in image

I don't need a working solution but I'm looking for somebody who can push me into the right direction with some useful hints/links: I have an image with a fiducial in it (can be e.g. a cross or dot or whatever simple geometry). The images source…
Elmi
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Histogram of Oriented Gradients vs Edge Orientation Histograms

I am not clear about the difference between the HOG and EOH. Hog is based on image derivatives EOH is based on edge directions. It seems that HOG also somehow a representation of EOH. Could you please give me some explanation about how EOH differs…
user570593
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how to write a matlab code for a pattern recognition in neural network

I have a different sets of vectors for an object. These vectors are different and are extracted from a particular shape. I want to train my Neural Network in matlab to recognize this particular shape. So that when I input another different vectors…
user1153308
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Digit Recognition with Bayesian classes

I need to write an OCR program for digits only. I will use MNIST datasets. The problem is I do not know where to start. There are a lot of papers which doesn't really explain the algorithm. I don't really have much knowledge about pattern…
akaya
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Drawing shape context logpolar bins in MATLAB

I am using shape context histograms as a feature descriptor to encode silhouette images. To assist with debugging, I would like to view the shape context logpolar bins overlaid on a silhouette image (the sample points taken from the edge image). An…
Josh
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3-D Shape detection from triangulation mesh

I'm looking for any algorithm or source code which can find whole or partial simple 3-D shapes (sphere, cylinder, cone, etc) in a 3-D triangulation mesh. I've found several papers on algorithms (for example see this PDF) which can find shapes in…
ergosys
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Java String Pattern Recognition

I have a string that is about a thousand characters long composed of L's, T's, and A's. I'm pretty sure there is a simple pattern in it and I'm wondering if there is any quick and easy way of going about finding it. This string changes so that this…
nite
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feature selection in wrapper method and information filtering?

I see one example in old-mid exam from well-known person Tom Mitchell, as follows: Consider learning a classifier in a situation with 1000 features total. 50 of them are truly informative about class. Another 50 features are direct copies of the…
user4591951
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How to use DoG Pyramid in SIFT

I am very new in image processing and pattern recognition. I am trying to implement SIFT algorithm where I am able to create the DoG pyramid and identify the local maximum or minimum in each octave. What I don't understand is that how to use these…
Ahmet Keskin
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Finding the recurring pattern

Let's say I have a number with a recurring pattern, i.e. there exists a string of digits that repeat themselves in order to make the number in question. For example, such a number might be 1234123412341234, created by repeating the digits 1234. What…
inspectorG4dget
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what is the best way to generate fake data for classification problem?

i'm working on a project and i have a subset of user's key-stroke time data.This means that the user makes n attempts and i will use these recorded attempt time data in various kinds of classification algorithms for future user attempts to verify…
berkay
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What are interesting ideas for experimenting with Artificial Neural Networks?

I'm after a list of possible neural network implementations that can be experimented with. Possibly something that could take an hour to a week to write. What other possibilities are there? Here's the list so far: Games tic-tac-toe Connect…
gak
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Multivariate Decision Tree learner

A lot univariate decision tree learner implementations (C4.5 etc) do exist, but does actually someone know multivariate decision tree learner algorithms?
Sney
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