<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <!--Converted with LaTeX2HTML 98.1p1 release (March 2nd, 1998) originally by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds * revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan * with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --> <HTML> <HEAD> <TITLE>Image Manipulations</TITLE> <META NAME="description" CONTENT="Image Manipulations"> <META NAME="keywords" CONTENT="vol2"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <LINK REL="STYLESHEET" HREF="vol2.css"> <LINK REL="next" HREF="node24.html"> <LINK REL="previous" HREF="node15.html"> <LINK REL="up" HREF="node10.html"> <LINK REL="next" HREF="node20.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html1683" HREF="node20.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html1680" HREF="node10.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html1674" HREF="node18.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html1682" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="icons.gif/contents_motif.gif"></A> <BR> <B> Next:</B> <A NAME="tex2html1684" HREF="node20.html">Digital Filters</A> <B> Up:</B> <A NAME="tex2html1681" HREF="node10.html">Computational Methods</A> <B> Previous:</B> <A NAME="tex2html1675" HREF="node18.html">Geometric Corrections</A> <BR> <BR> <!--End of Navigation Panel--> <H1><A NAME="SECTION00530000000000000000"> </A> <A NAME="image-man"> </A> <BR> Image Manipulations </H1> After the raw image data are calibrated into relative intensive values several operations may be applied to frames to enhance features which later should be studied. This involves manipulations with the Signal-to-Noise ratio (<I>S</I>/<I>N</I>), resolution, and coordinates of the images. Further, real but disturbing features may be removed to allow a better access to the objects of interest. The typical methods include digital filtering, coordinate transformations, and image restoration. <P> <BR><HR> <!--Table of Child-Links--> <A NAME="CHILD_LINKS"> </A> <UL> <LI><A NAME="tex2html1685" HREF="node20.html">Digital Filters</A> <LI><A NAME="tex2html1686" HREF="node21.html">Background Estimates</A> <LI><A NAME="tex2html1687" HREF="node22.html">Transformations</A> <LI><A NAME="tex2html1688" HREF="node23.html">Image Restoration</A> </UL> <!--End of Table of Child-Links--> <BR><HR> <ADDRESS> <I>Petra Nass</I> <BR><I>1999-06-15</I> </ADDRESS> </BODY> </HTML>
