Measuring Search Relevance using NDCG

Normalized Discounted Cumulative Gain (NDCG) is popular method for measuring the quality of a set of search results. It asserts the following:

Very relevant results are more useful than somewhat relevant…

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Image metadata

Metadata may be written into a digital photo file that will identify owner of it,…

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Spatial Search with Solr

In this article we will see how solr supports spatial search.

Spatial Search

Solr supports location data for use in spatial/geospatial searches. Using spatial search, you can:

Index points or other…

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ng-Cloak directives in AngularJS

Today  I am going to share the interesting article about ng-Cloak directive….

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Named Entity Recognition

Introduction: Named Entity Recognition (NER) is a subtask of information extraction. It is a process of classifying elements in text into pre-defined categories. These categories include the names of persons, organizations,…

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Introduction to SVG Part - 1

SVG Elements

Introduction

SVG is short for Scalable Vector Graphics. It is a graphic format in which the shapes are specified in XML. The XML is then rendered by an SVG viewer.…

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LIRE: Lucene Image Retrieval

LIRE is a Java library that provides a simple way to retrieve images based on…

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Solr Terms Component usage

In this article we will see how  solr Terms Component can be used for building Auto-suggest feature  and  Browse index feature.

Terms Component:

The Terms Component returns information about  indexed terms in…

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Solr 5. 3: Execute SQL queries

SQL statement is the most widely used language for querying data and is the…

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Query Rescoring in Solr

Sometimes relevance requirements are very complex and creates performance issues during execution. There is a very nice feature Introduced in Solr 4.9 called “Query Reranking/Rescoring” (SOLR-6088) which allows us to…

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