Top "Feature-extraction" questions

In pattern recognition and in image processing, feature extraction is a special form of dimensionality reduction.

HOG Feature Implementation with SVM in MATLAB

I would like to do classification based on HOG Features using SVM. I understand that HOG features is the combination …

matlab classification svm feature-extraction matlab-cvst
ValueError: could not convert string to float, Python

I have a dataframe on which i'm trying to implement feature selection. There are 45 columns of types, integer, float and …

python-3.x pandas numpy feature-extraction valueerror
Why do we maximize variance during Principal Component Analysis?

I'm trying to read through PCA and saw that the objective was to maximize the variance. I don't quite understand …

machine-learning feature-extraction
Sift Extraction - opencv

I'm trying to get started working with sift feature extraction using (C++) OpenCv. I need to extract features using SIFT, …

c++ opencv sift surf feature-extraction
Uniform LBP with scikit-image local_binary_pattern function

I'm using the local_binary_pattern from skimage.feature with uniform mode like this: >>> from skimage.feature …

python feature-extraction scikit-image
Getting feature names from within a FeatureUnion + Pipeline

I am using a FeatureUnion to join features found from the title and description of events: union = FeatureUnion( transformer_list=[ # …

python-3.x scikit-learn nlp feature-extraction
What FFT descriptors should be used as feature to implement classification or clustering algorithm?

I have some geographical trajectories sampled to analyze, and I calculated the histogram of data in spatial and temporal dimension, …

machine-learning fft data-mining similarity feature-extraction
Attribute error while using scikit-learn

I am trying to find similar questions using scikit using cosine similarity. I was trying this sample code available on …

python nltk scikit-learn feature-extraction
OpenCV: how to detect lines of a specific colour?

I am working on a small OpenCV project to detect lines of a certain colour from a mobile phone camera. …

c++ opencv feature-extraction hough-transform color-detection