📄 matlab central file exchange - image enhancement based-on local statistics using colfilt.mht
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<TD vAlign=3Dtop width=3D89><B>Author:</B></TD>
<TD colSpan=3D2><A=20
=
href=3D"http://www.mathworks.com/matlabcentral/fileexchange/loadAuthor.do=
?objectType=3Dauthor&objectId=3D1094835">Xinian Zuo</A></TD></TR=
>
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<TD vAlign=3Dtop width=3D10 height=3D15> </TD>
<TD vAlign=3Dtop width=3D89 =
height=3D15><B>Summary:</B></TD>
<TD colSpan=3D2 height=3D15>By built-in function =
colfilt, I=20
develop one image enhancing codes based on local =
statistics in=20
Gonza</TD></TR>
<TR>
<TD vAlign=3Dtop width=3D10 height=3D15> </TD>
<TD vAlign=3Dtop width=3D125 height=3D15><B>MATLAB =
Release:</B></TD>
<TD vAlign=3Dbottom colSpan=3D2 =
height=3D15>R13SP1</TD></TR>
<TR>
<TD vAlign=3Dtop width=3D10 height=3D15> </TD>
<TD vAlign=3Dtop width=3D125 height=3D15><B>Required=20
Products:</B></TD>
<TD colSpan=3D2 height=3D15>Image Processing=20
Toolbox</TD></TR></TBODY></TABLE></TD></TR>
<TR>
<TD vAlign=3Dtop width=3D10> </TD>
<TD vAlign=3Dtop width=3D135><B>Description:</B></TD>
<TD class=3Dlnwrp width=3D456>Ideas from Gonzalez's dip =
book.test image=20
is downloaded from its webpage!I provide two functions with =
the same=20
function. The first invoked by NLFILTER and second invoked =
by=20
COLFILT.<BR>In this case, file named demo_locstat2.m using=20
mylocstat2 is much fast than demo_locstat.m using mylocstat. =
Please=20
pay more attention on the different codeing styles between=20
mylocstat.m and mylocstat2.m.<BR><BR>MYLOCSTAT - perform =
single-back=20
gray value imadjustation based on local statistics for =
sliding block=20
operation.<BR>Motivation: try local statistics enhancement=20
operation.<BR>Parameters:<BR>Iloc - the local neighbourhood =
of image=20
to be processed.<BR>M - the global mean of image's gray =
values.<BR>D=20
- the global variance of image's gray values.<BR>E - the =
ehancement=20
constant<BR>k - the 1x3 sized threshold vector:<BR>- k(1) is =
mean=20
threshold<BR>- k(2) and k(3) are variance=20
threshold<BR><BR>MYLOCSTAT2 - perform single-back gray value =
imadjustation based on local statistics for sliding block=20
operation.<BR>Motivation: try local statistics enhancement=20
operation.<BR>Parameters:<BR>Icol - the matrix includes the =
columns=20
of all local neighbourhoods.<BR>M - the global mean of =
image's gray=20
values.<BR>D - the global variance of image's gray =
values.<BR>E -=20
the ehancement constant<BR>k - the 1x3 sized threshold =
vector:<BR>-=20
k(1) is mean threshold<BR>- k(2) and k(3) are variance =
threshold=20
<BR></TD></TR>
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name=3DfileName> <INPUT type=3Dhidden value=3D.zip name=3DfileExt> =
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<TD width=3D286><B class=3Dfeh4blk>File Details</B></TD>
<TD width=3D228> </TD></TR>
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<TD vAlign=3Dtop width=3D"1%"> </TD>
<TD vAlign=3Dtop width=3D"25%"><B>File Id:</B></TD>
<TD width=3D"20%">9129</TD>
<TD vAlign=3Dtop width=3D"25%"><B>Average rating:</B></TD>
<TD width=3D"29%">4.5</TD></TR>
<TR bgColor=3D#f4f4f4>
<TD vAlign=3Dtop> </TD>
<TD vAlign=3Dtop><B>Size:</B></TD>
<TD>37 KB</TD>
<TD vAlign=3Dtop><B># of reviews:</B></TD>
<TD>3</TD></TR>
<TR bgColor=3D#f4f4f4>
<TD vAlign=3Dtop> </TD>
<TD vAlign=3Dtop><B>Submitted:</B></TD>
<TD>2005-11-24</TD>
<TD vAlign=3Dtop><B>Downloads:</B></TD>
<TD>1865</TD></TR>
<TR bgColor=3D#f4f4f4>
<TD vAlign=3Dtop> </TD>
<TD vAlign=3Dtop><B>Subscribers:</B></TD>
<TD>0</TD>
<TD colSpan=3D2> </TD></TR>
<TR bgColor=3D#f4f4f4>
<TD> </TD>
<TD vAlign=3Dtop><B>Keywords:</B></TD>
<TD vAlign=3Dtop colSpan=3D3>image processing,local =
statistcs</TD></TR>
<TR bgColor=3D#f4f4f4>
<TD vAlign=3Dtop width=3D10> </TD>
<TD vAlign=3Dtop colSpan=3D4> </TD></TR>
<TR bgColor=3D#f4f4f4>
<TD> </TD>
<TD vAlign=3Dtop><B>Zip file contents:</B></TD>
<TD vAlign=3Dtop colSpan=3D3>demo_locstat.m, demo_locstat2.m,=20
mylocstat.m, mylocstat2.m, =
sem.jpg</TD></TR></TBODY></TABLE><BR><!--Acknowledgements =
--><!--Acknowledgements --><BR>
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<TD width=3D286><B class=3Dfeh4blk>User Reviews</B></TD>
<TD width=3D228>
<DIV class=3Dsmall align=3Dright>Number of Reviews: =
3</DIV></TD></TR>
<TR>
<TD colSpan=3D2><IMG height=3D5 alt=3D""=20
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