Statistical Analysis Stack Exchange
Statistical Analysis Stack Exchange

Questions tagged [pattern-recognition]

Refers to techniques for classifying data into categories based on similarities (which can either be known previously, or learned).

Overview

Pattern recognition refers to techniques for classifying data into categories based on similarities (which can either be known previously, or learned).

References

408 questions
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Analysis of temporal patterns

I am analysing data on events that I have categorized into groups. So, for instance, say I have 3000 events categorized into 5 groups, which we call A to E. I will have something like Event | Group | Time --------+-------+------- 1 …
nico
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Measuring the effectiveness of a pattern recognition software

Are there any objective methods of assessment or standardized tests available to measure the effectiveness of a software that does pattern recognition?
Ami
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Similarity between time-dependent paths

Let us have a board, and a set of trajectories on that board. Those trajectories are represented as time-dependent curves, $\gamma_i:[0,T_i] \longrightarrow\mathbb{R}^2$, where the $T_i>0$ are non necessarily equal for the different $i$'s (actually,…
JavierE
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Find music tempo with a audio signal

I'd like to know if there is statistical techniques that aims to find the rhythm/tempo of a music based on audio signal :
Stephen
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Find pattern in vector data

I have two groups of vectors A = [[0 0 0 0 1], [0 0 0 1 0], …] and B = [[0 0 1 0 1], [0 1 0 0 1], …]. I want to find the pattern that differentiates the vectors in A from the vectors in B. How to do that? Example output: if both the 2nd and 3rd…
user37959
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Detect cyclic patterns in stream of characters with random noise

I am looking for an algorithm which can detect cyclic pattern in streams of characters which have random noise embedded in them. An example of cyclic pattern with a set of characters a - m for a sequence of characters abcbacbabcecbacbabcdefefghjklm…
riza-h
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How to recognize repeated movement patterns of mouse behavior using OpenCV?

I have a situation where I have collected mouse movement points from a website. I have a series of (x, y)-points, and I need to detect different repeated patterns of mouse movement from this data. For example, mouse moving very slowly, mouse moving…
mwolce
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Recognition of household objects ( image processing, pattern recognition ) using wide lens?

Camera setup: We have setup some stereo cameras in a living apartment. That is, the indoor environment is monitored. With the stereo cameras, wide lens (3.5mm) are used to cover a big volume. The height from the floor is around 2.8 meters. The…
edayangac
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Pattern Recognition Problem

I have the following questions: Suppose we have the following chart, which represents the relationship between faculties and types of objects; for example CTE represents Computer Technologies, and the intersection between CTE and Wood says that…
dato datuashvili
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Why is pattern recognition often defined as an ill-posed problem?

A Well-posed problem should have the following properties: a solution exists the solution is unique the solution's behavior changes continuously with the initial conditions. A problem which is not well-posed is called ill-posed. In some research…
mrazizi
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Identification of a tagged person on photo

I'm not sure if this problem was discussed before - if so could anyone please provide the link. The problem is the following: let's say I have a photo with some person who is tagged there, in the same way as in Facebook - there is the square which…
Oleg
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Can you help me understand why there is a $h^d$ but not h in parzen window

Is that because x is d dimension. And when we do the change of variable, we have to do that? this is where my question comes from: How to show that the general parzen window provides a probability distribution?
hail
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Difference between a Poisson process and a Markov process, in terms of applications

What is the difference between a Poisson process and a Markov process, in terms of applications?
M.T
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Finding Patterns In A Data Using Coordinates

I am trying to find a theoretical approach to find patterns using a data set plotted on a graph. Below is the sample image of how the data looks on a plot. I am wondering if there is an intuitive way by using coordinates to find if the set of…
Chetan Arvind Patil
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Method to discern the number of times a pattern has happened

I have a data set with text-strings that contain a pattern within them and I want to deduce the number of times the pattern has happened. For instance, if I would input: 'abcdefabcdefabcdef' The solution should be 3. Unfortunately my patterns will…
Jon Nagra
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