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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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Regression using two dependent variables

I have some data for time series prediction. variable 1 is speed and variable 2 is time of the day the vehicle is starting. The output is time taken for the vehicle to reach destination. I used both variable 1 and variable 2 as inputs for svr using…
ChanChow
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What classifier to use while performing unsupervised learning

I am new to Machine learning and I have this basic question. As I am weak in Math part of the algorithm I find it difficult to understand this. When you are given a task to design a classifier(keep it simple -- a 2 class classifier) using…
ShakHub
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Crossvlaidation classifier display outputs in matlab

I have a simple question and I'am not very familiar with matlab. so code would be very helpfull ;). I do have a KNN classifier which I want to evaluate via crossvalidation. My code looks like the following: load ds train_data=…
loop
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Accuracy of Neural network Output-Matlab ANN Toolbox

I'm relatively new to Matlab ANN Toolbox. I am training the NN with pattern recognition and target matrix of 3x8670 containing 1s and 0s, using one hidden layer, 40 neurons and the rest with default settings. When I get the simulated output for new…
user2814887
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Testing the validity of a boolean pattern recognition algorithm

How do I determine a sufficient sample size to test an algorithm that can not be unit tested (~pattern recognition). I have a relatively simple algorithm that uses vehicle position data, and bridge positional data, to determine whether a vehicle has…
Jags
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Using C++ in xcode for image and video processing

I am studying in the area of image and video processing - specifically in the field of pattern recognition (objects, people etc.). I wish to use a programming language to apply the transformation to images and video (more importantly video). I am…
user7289
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How can I use hierarchicalClustering?

I use this code: int c_count =cv::flann::hierarchicalClustering >(data,cluster,kmeans_param); I got this error: error C2146: syntax error : missing ';' before identifier 'ElementType' How can I solve it? My features is 3d (x,y,theta)…
Mostafa Sataki
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How would you make a Windows application that conditionally blocks input?

You may have heard of PawSense, a Windows-only utility that prevents keystrokes from being entered when it believes there is a cat or other animal on the keyboard typing nonsense input like "zlxkkkkkkkk;". It seems like a fun project to do in my…
Warren Henning
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How the support vectors in the svmtrain function, converge the input data into a small subset?

The input to the svmtrain function is a matrix with the dimension 151x22. While applying the svmtrain function with the above matrix ( as shown below ), I am getting a structure. Inside the structure, there is a field named "support vectors". The…
Mrk
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Waveform Trend Analysis/Pattern Recognition

Im appealing to your brighter minds on this one! This is my first foray into pattern recognition/trend analysis, basically i want to be able to differentiate between waveforms (essentialy line graphs). For instance the original graph would…
Rg786
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Techniques for image analysis of gray scale images

I have taken on a project to automatically analyse images taken from a microscope of a specific type micro fractures. The problem is that the camera used was on an "auto" setting and so the micro fractures (which look like pin pricks) are a variety…
Chris Headleand
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libsvm liblinear how to use histogram intersection/chi square kernels

Is it possible to use histogram intersection /chi sauare kernels in LIBLINEAR? My problem is I have a feature vector of size 5000 all are histogram features. I dont know how to train/ test with SVM. How can I train this using SVM? libSVM supports…
user570593
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Fast image scanning

I have a very large image and I want to scan it with a small template (T) and store in a database and use that database for image reconstruction. But, if I want to scan all of the image, the size of my pattern database will be very large. Is there…
Sam
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Why won't this work; opencv Mat_

I can't seem to get this to work. I'm trying to get the pixel value of an image but first need to change the color of the image, but since I cannot use int or just Mat because the values are not whole numbers, I have to use and because of…
user1371674
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OpenCV for delphi 7, issue with the library wrapper

I would like to use the library in my D7 project. I have downloaded the wrappers from: sourceforge.net The problem is that the example the author wrote to recognize squares in the given image doesn't work. After some time it raises AV exception…
John
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