Questions tagged [information-extraction]

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What metric should I use for evaluating a reading order of text tokens given the correct ordering?

Given an ordering of tokens extracted from a document with a ground truth ordering available. What would be the correct way to evaluate the ordering? I took a look at some Machine Translation ...
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How to extract data from website using pagination when page number is not assigned? [migrated]

I am using data miner extension for Google Chrome to extract data from web pages. To extract data from multiple pages at a time, data miner uses pagination option. Here is the link of website from ...
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Annotating Dataset for Named Entity Recognition

I have New data of Plants research. It has the product it gives, the fertilizers that should be used for the plant and many more.. The names of plants,products and everything are unique and none of ...
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1answer
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How to train a Neural Network on sparse data?

I am trying to train a sequence model to extract specific substrings. I am working on extremely sparse text data (Sparsity ~ 0.03%, <1000 examples). After training for 500 epochs, the performance ...
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2answers
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Feature extraction definition

I have difficulty understanding the concept of feature extraction since there are two main ways to describe it. The first one refers to mapping the raw data into a vector in R^d or the translation of ...
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Extracting metrics from natural language

Imagine a text like The revenue amounted to mEUR 124 during the year while last year it resulted in mEUR 100. I want to use ML methods to extract two outputs like ...
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Reconstructing face from randomised embedding

It is fairly agreed in literature that from a given face-embedding (that is a vector of features values) it is possible, with a good amount of effort, to reconstruct the original face, (See here for ...
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27 views

Is there a method to approximately predict a 3D curve given two plane view of the curve?

Let's say the original data contains three variables, so it is a list of (x,y,z). In the figure, the blue and red curves are the lists of (x,z1) and (y,z2), respectively. These two lists are obtained ...
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How to make recognition of the important document's attributes

We have a set of PDFs with the different types of documents from the various companies. The goal: to predict which of them contain some important attributes (for example, document number, customer ...
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2answers
32 views

Extracting Text Components from unstructured data

I'm trying to understand what types of techniques would be most applicable to the following type of problem. I'm trying to, given a webpage url that contains a recipe, separate the ingredient list ...
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1answer
29 views

Unsupervised answering for a predefined set of questions

I am working on a project to read up a text segment and find answers to a specific set of questions, in order to do some information extraction. I have a set of text corpus (each of about 3000 words),...
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121 views

What Machine Learning library / algorithm should I use to extract pre-defined features from email text?

I'm new to ML, so if it seems like I am making incorrect assumptions on how to go about doing something, please feel free to correct me. I would like to be able to pass in as training data many ...
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Is it better to do feature extraction and select the k most weighted features or do feature selection?

I have 315 data with 12076, I need to reduce the dimension and also select just 10 most important features. What is the best way? Is it better to do feature extraction and choose the features with ...
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Machine learning - Text extraction / pattern identification

I am new to machine learning, There will be set of paragraph and i need to extract postcode from each paragraph. (The postcode may not have the same pattern as they are obtained from different ...
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952 views

Is Machine Learning viable for Extracting product Information from webpages?

I have a task to extract product information from a certain set of websites for price analysis. The product group I'm trying to harvest data is well defined, I could easily provide a set with all the ...
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1answer
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Guessing/extracting from the pool of partially right guesses

Lets assume that I have integer numbers from 1 to 50. I imagine any 5 unique numbers from 1 to 50. A computer can generate an array of 5 random numbers, as many times as it wants. Each time it ...
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119 views

Proof that perfect feature extraction doesn't exist?

Anyone is aware of any proofs that "perfect feature extraction doesn't exist" (on any domain, language, vision, etc). Either philosophical or mathematical, are fine. Update: or the inverse ...
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Which model for this information extraction problem?

I am trying to solve the following pattern recognition / information extraction problem. Assume I have a text where each token has been annotated by a single class among $K$ classes available (with a ...