A Review on Noise Removal from Web pages for Web Content Mining

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International Institution for Technological Research and Development
Volume 1, Issue 1, 2015
A Review on Noise Removal from Web pages
for Web Content Mining
Mrs Madhushree B
L. J. Institute of Engineering and
Technology
Mentoring Masters in Computer Engineering
Gujarat Technological University
Ahmedabad-Gujarat-India.
Email: [email protected]
Telephone:(+91)7405285827
Abstract—Today internet has made the life of human
depen-dent on it. Almost everything and anything can be used
for discovering useful knowledge or information from the web
page. A web page typically contain large amount of information
that is not part of the main contents of the pages. E.g. Banner
ads, navigation bars, copy right, privacy notices,
advertisements which are not related to the main content. So
noisy data affect the performance of web content mining. The
main objectives of this area is removing such irrelevant
information in web pages. The main purpose of this paper is to
review and discuss the research work that has been done in
this area and identifying the issues in this area.
Index Terms—Web Mining, WWW, Web Pages, DOM Tree,
Noise.
I. INTRODUCTION
Yogita K Patel
L. J. Institute of Engineering and
Technology
Student of Masters in Computer Engineering
Gujarat Technological University
Ahmedabad-Gujarat–India.
Email: [email protected]
Telephone: (+91)9409437004
web sites, legal or illegal duplicated web pages, some
old versioned web pages, etc.
There are several methods are available to segment
web pages into blocks. In the DOM based segmentation
approach an HTML document is represented as a DOM
tree. DOM tree is generally provides a useful structure
and better representa-tion for a web page. [1]
A. APPROACHES OF NOISE REMOVAL FROM WEB CON-
TENT MINING
Web Content mining has following approaches to
mine data: unstructured mining, structured mining, and
semi-structured mining. [12]
B. Unstructured Data Mining
Data mining is define as extracting the information from
the large set of data. The massive information available on
the World Wide Web has search for data. A web mining
has important task to discover useful knowledge or extract
information from the web. Web mining can be divided in to
three categories: web structure mining, web usage mining
and web content mining. Web structure mining is the
process of discovering hyperlink and document structure
information from the web. Web usage mining is the
application of data mining techniques for finding interesting
and useful usage patterns from web data which makes it
more demanding for web based applications. Web content
mining is the process of extracting useful information from
the contents of web documents.
Text document is the form of unstructured data. Most of the
data that is available on web is unstructured data. The
research of applying data mining techniques to unstructured
data is known as knowledge discovery in texts. [12]
In the World Wide Web Noise on the web pages are not the
part of main content and irrelevant information in web pages
can affect web mining task.Noises present in web pages can
be grouped into two categories according to their granularities.
Local or Intra-page noises: These are noisy information blocks
are jumbled with the main contents within a single web page.
Local noises include banner and advertisements, navigational
guides, some pictures for decoration, etc. Global or Inter-page
noises: These are noises on the web, which are usually no
smaller than single web pages. Global noises include mirror
2) Topic Tracking : This technique checks the documents
viewed by the user and studies the user profile. It predicts the
documents related to users interest. The topic tracking applied
by yahoo, user give a keyword and if anything related to
keyword pops then the user is informed about that. This
technique can be applied by many fields. The two fields where
it is used is medical field and education field. In medical field
doctors easily come to know about the latest treatments. In
education field it is used to find out the latest reference for
research related work. [12]
1) Information Extraction : To extract information from
unstructured data that is present on web pattern matching
is used. It traces the keywords and phrases and then finds
out the connection of keywords within text. When large
volume of text is there then the technique is very useful.
Information extraction transforms unstructured text to more
structured form. First, from extracted data the information is
mined, then using different types of rules, the missed out
information is found. Information extraction making
incorrect predictions on data is discarded . [12]
International Institution for Technological Research and Development
Volume 1, Issue 1, 2015
3) Summarization : The technique is used to reduce the
length of the document by maintaining the important points.
It helps the user to decide whether to read the topic or not.
The summarization technique uses two methods that is the
extractive method and the abstractive method. The
extractive method selects a subset of phrases, sentences
and words to form the summary from the original text. The
abstractive method builds an internal semantic
representation and then uses natural language generation
technique to create the sum-mary. [12]
4) Categorization : This technique identifies the main
theme by placing the documents in a predefined set of
group. The technique counts the number of words in the
document and this decides the main topic. According to
the topic the rank is given to the document. The
documents with majority contents on particular topic are
given first rank. This technique helps in providing
customer support to the industries and business. [12]
5) Clustering : The technique is used to group similar
documents. In this grouping of documents is not done on
the basis of predefined topics. It is done on fly basis. Some
documents may appear in different group. As a result
useful documents are not omitted from search results. This
technique helps user to select the topic of interest. [12]
6) Information Visualization : Visualization utilizes
feature extraction and key term indexing. Documents
having similarity are found out through visualization. Large
textual materials are represented as visual maps or
hierarchy where browsing facility is allowed. It helps in
visually analyzing the content. The user can interact by
scaling, zooming and creating sub maps of the graphs. [12]
C. Structured Data Mining
The techniques are used to extract structured data
from web pages. Data in the form of list, tables and tree
is structured data. The structured data is easy to extract
as compared to unstructured data. [12]
1) Web Crawler : Crawlers are computer programs which
traverse the hypertext structure in web. Web crawlers can be
used by anyone to collect information from the web. Search
engines use crawlers are two types of crawlers. They are
internal and external web crawler. Internal web crawler crawls
through internal pages of the website and the external crawler
crawls through unknown websites. [12]
2) Page Content Mining : Page content mining is a
tech-nique that is used to extract structured data which
works on the pages that are ranked by the traditional
search engines. The pages are classified by comparing
the page content rank. [12]
3) Wrapper Generation : The information is provided
by the wrapper generator on the capability of sources.
Web pages are ranked by traditional search engines. By
using the page rank value the web pages are retrieved
according to the query. [12]
D. Semi-Structured Data Mining
1) Object Exchange Model : The relevant information is
extracted from semi-structured and is collected in a group of
useful information and is then stored in Object Exchange
Model (OEM). This helps the user to accurately understand the
structure of the information that is available on web. [12]
2) Top down Extraction : This technique helps in
extracting complex objects from a rich web sources and
decompose them into less complex objects until atomic
objects have been extracted . [12]
3) Web Data Extraction Language : This technique
helps in converting web data to structured data and then
delivers this data to end users . [12]
II. RELATED WORK
There are many Researchers have worked in this area
for extracting main content and removing noisy data from
web pages. Most of have focused on detecting main
content and informative blocks in web pages. Although
cleaning noisy data is an important task, relatively list of the
work has been done in this field such as,
In Structural analysis and Regular Expressions based Noise
Elimination from Web pages for Web content Mining Amit
Dutta et al. proposed the noise elimination method that uses
tag based filtering followed by structural analysis of the web
page. The system are uses two phases: first Filtering based on
Regular Expression and second Structural analysis of the
crawled web pages after filtering.This paper focus on detecting
and eliminating local or intrapage noises from web pages. [1]
In Noise Elimination from Web page Based on Regu-lar
Expressions for Web content mining Amit Dutta,Dipak
Kole,Tanmoy Golui et al. proposed approach to detect the
global noises or inter-pages from web pages. The proposed
technique consists of two phases. In the first phase, filtering
method based on regular expression is used on web pages
to remove noisy HTML tags The filtered document then
undergoes to second phase where an entropy based
measured is used for removing further noise. [2]
In Mining Contents in web page using Cosine Similarity
Swe Nyein et al. propose an approach to extract the main
content from the web documents. The algorithm based on
con-tent structure tree (CST).firstly, proposed system use
HTML parser construct DOM tree from construct construct
DOM tree from content structure tree which can easily
separate the main content blocks from the other blocks.
The proposed system introduce cosine similarity measure
to which part of tree represent less important and which
part of tree represent the more important of the page. [3]
In An Efficient Method of Eliminating noisy information in
web pages for data mining Tripathy, Singh et al. proposed
cleaning technique that is based on the analysis of both the
layouts and the actual contents of the Web pages in a given
Web site. Thus, in first task of proposed technique is to find a
suitable data structure to represent both the presentation
styles and the actual contents of the Web pages in the site.
They propose a Pattern Tree (ST) to capture those frequent
International Institution for Technological Research and Development
Volume 1, Issue 1, 2015
presentation styles and actual contents of the Web site.
The site pattern tree (SPT) provides us with rich
information for analyzing both the structures and the
contents of the Web pages and used an information
based measure to evaluate the importance of element
nodes in SPT so as to detect noises to clean a page
from a site, they simply map the page to its SPT. [4]
In Noise Removing from web pages using Neural Network
Thanda Htwe et al. propose the mechanisms to eliminate
multiple noise patterns in Web pages to reduce irrelevant and
redundancy data by applying Case-Based Reasoning
technique to detect multiple noise patterns in current Web
page and also present back propagation neural network
algorithm for matching current noise with storing noise patterns
for noise classification, and then they remove this noise
pattern in current page for content extraction. [5]
In Elimination of Noisy Information from web page using
DOM and Ant Colony Optimization Shaikh Sakina Banu et
al. Proposed method to eliminate noisy information from
web page using DOM tree approach and Ant Colony
Optimization to improve the efficiency of mining and also
apply neural network algorithm to detect noisy data. [6]
In Extraction of web news from web pages using a
ternary tree approach Debina Laishram et al. proposed
a new approach to extraction of news from multiple
news web sites. The proposed method using ternary
tree approach measure which expands when series of
common tags are found in the web pages. [7]
In LBDA: A Novel Framework for Extracting Content from
web pages C Deepa et al. proposed approach extracts the
main content from the web page and remove the irrelevant
information like header, footer contents, navigation bars, advertisements and other noisy images. The proposed methodology uses the following techniques: tag tree parsing to get the
analysis structure, block acquiring page segmentation method
to remove unwanted tags, and data extraction to retrieve the
necessary contents. It can eliminate noise and extract the
main content blocks from web page. [8]
In Content Extraction from web pages Based on Chinese
Punctuation Number Mingqiu Song et al. proposed approach
which can discover web page content according to the
Chinese punctuation number. It can eliminate noise and
extract main content blocks from web page. This approach is
accurate and suitable for most Chinese web sites. [9]
In Automatic News Extraction System for Indian Online
News Papers Dipali B, Sachin Deshmukh et al.proposed approach for the Indian online newspaper which extract contents
from news web databases. The system first browse Web
pages as per the input URL given by user and Next generate a
DOM tree of the news Web page data. And at last, we not only
identify and extract valuable news from the Indian news web
pages but also remove noisy data. This paper proposed the
novel approach for extract data from online Indian newspapers
written in the many popular languages such as Marathi, Hindi,
Tamil, Gujarati, Kannada, Oriya, Telugu, Punjabi, etc. [10]
In Using Visual Clues Concept for Extracting Main Data
from Deep Web Pages Satish J.Pusdekar et al.proposed
ap-proach extracting main data from web pages. This
paper vision-based approach is web page programminglanguage-independent approach is proposed. This
approach utilizes the visual features of the web pages to
extract data from deep web pages including data record
extraction and data item extraction. [11]
III. CONCLUSION
WWW is a source of information where large amount of
data is stored. The information present in the local and global
noise. The purpose of noise elimination is to improve web
mining. Extracting useful information from the web pages is
very complex task. Accurate and effective method to find more
relevant document from the web pages. Organizing and
removing noise from web pages will get better on correctness
of search results as well as explore results. We saw various
approach which enhance the capacity of information extraction
and remove the noise from the web pages. In this paper most
of the approach based on the DOM tree. The DOM tree
approach is always feasible as it converts the complex page
into simplified form.so in the future extended work on the DOM
tree approach and will get accurate results.
REFERENCES
[1] Amit Dutta, Sudipta Paria, Tanmoy Golui and Dipak k. Kole
Structural Analysis and Regular Expressions based Noise
Elimination from Web Pages for Web content mining IEEE 978-14799-3080-7/14,PP.1445-1451,2014.
[2] Dutta Amit, Paria Sudipta, Golui Tanmoy and Kole Dipak, Noise
Elimination from Web Page based on Regular Expressions for
Web Content Mining Proceedings of the Second International
Conference on Advanced Computing, Networking and Informatics
(ICACNI-2014), Volume 27, pp 545-554, June 2014
[3] Swe Swe Nyein,Mining Contents Web Page Using Cosine
Similarity, IEEE 978-1-61284-840-2/11,pp 472-475,2011.
[4] A. K. Tripathy, A. K. Singh An Efficient Method Of Eliminating
Noisy Information In Web Pages for Data mining in Proceedings
of the Fourth International Conference on Computer and
Information Technology (CIT04) 0-7695-2216-5/04 2004 IEEE
[5] Thanda Htwe, Khin Haymar Saw Hla Noise Removing from Web
Pages Using Neural Network 2010 ,978-1-4244-5586-7/10/26.00
C 2010 IEEE Volume 1.
[6] Shaikh Sakina Banu, Hitesh Kumar Bhatia Elimination of Noisy
In-formation from Web Page using DOM and Ant Colony
Optimization International Journal of Engineering Research And
Technology,Vol.3 Issue 2,PP 1227-1231,feb-2014.
[7] Debina Laishram, Merin Sebastian Extraction of web news from web
pages using a ternary tree approach Second International Conference
on Advances in Computing and Communication Engineering
ICACCE, 978-1-4799-1734-1/15 2015 IEEE,PP 628-633, 2013.
[8] C Deepa, LBDA: A Novel Framework for extracting content from web
pages International Conference on Advanced Computing and Communication Systems (ICACCS -2013), IEEE 978-1-4799-3506-2/13 2013
IEEE
[9] Mingqiu Song, Xintao Wu Content Extraction from Web Pages
Based on Chinese Punctuation Number 1-4244-1312-5/07/ 2007
IEEE,PP 5573-5575
[10] Vivek D. Mohod, Dipali B. Gaikwad, Sachin N. Deshmukh ,
Automatic News Extraction System for Indian Online News
Papers 978-1-4799-6896-1/14/ 2014 IEEE
[11] Satish J. Pusdekar, Using Visual Clues Concept for Extracting Main Data
from Deep Web Pages, International Conference on Electronic Systems,
Signal Processing and Computing Technologies 978-1-4799-2102-7/14
2014 IEEE DOI 10.1109/ICESC.2014.39, PP 190-193
International Institution for Technological Research and
Development
Volume 1, Issue 1, 2015
[12] Shipra Saini, Hari Mohan Pandey, Review on Web Content
Mining Tech-niques, International Journal of Computer
Applications (0975 8887) Volume 118 No. 18, May 2015.

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