textmatriximagereader.html

Geotools是一个开源的Java GIS工具包,可利用它来开发符合标准的地理信息系统。Geotools提供了OGC(Open Geospatial Consortium)规范的一个实现来作为他们的

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<A NAME="setInput(java.lang.Object, boolean, boolean)"><!-- --></A><H3>
setInput</H3>
<PRE>
public void <B>setInput</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;input,
                     boolean&nbsp;seekForwardOnly,
                     boolean&nbsp;ignoreMetadata)</PRE>
<DL>
<DD>Sets the input source to use. Input may be one of the following object (in preference
 order): <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/File.html" title="class or interface in java.io"><CODE>File</CODE></A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html" title="class or interface in java.net"><CODE>URL</CODE></A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/BufferedReader.html" title="class or interface in java.io"><CODE>BufferedReader</CODE></A>,
 <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/Reader.html" title="class or interface in java.io"><CODE>Reader</CODE></A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/InputStream.html" title="class or interface in java.io"><CODE>InputStream</CODE></A> or <A HREF="http://java.sun.com/j2se/1.4/docs/api/javax/imageio/stream/ImageInputStream.html" title="class or interface in javax.imageio.stream"><CODE>ImageInputStream</CODE></A>.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/image/io/TextImageReader.html#setInput(java.lang.Object, boolean, boolean)">setInput</A></CODE> in class <CODE><A HREF="../../../../org/geotools/image/io/TextImageReader.html" title="class in org.geotools.image.io">TextImageReader</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>input</CODE> - The input object to use for future decoding.<DD><CODE>seekForwardOnly</CODE> - If , images and metadata may only be read
                        in ascending order from this input source.<DD><CODE>ignoreMetadata</CODE> - If , metadata may be ignored during reads.</DL>
</DD>
</DL>
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<A NAME="getWidth(int)"><!-- --></A><H3>
getWidth</H3>
<PRE>
public int <B>getWidth</B>(int&nbsp;imageIndex)
             throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Returns the width in pixels of the given image within the input source.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>imageIndex</CODE> - the index of the image to be queried.
<DT><B>Returns:</B><DD>Image width.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE> - If an error occurs reading the width information
         from the input source.</DL>
</DD>
</DL>
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<A NAME="getHeight(int)"><!-- --></A><H3>
getHeight</H3>
<PRE>
public int <B>getHeight</B>(int&nbsp;imageIndex)
              throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Returns the height in pixels of the given image within the input source.
 Calling this method may force loading of full image.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>imageIndex</CODE> - the index of the image to be queried.
<DT><B>Returns:</B><DD>Image height.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE> - If an error occurs reading the height information
         from the input source.</DL>
</DD>
</DL>
<HR>

<A NAME="read(int, javax.imageio.ImageReadParam)"><!-- --></A><H3>
read</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/BufferedImage.html" title="class or interface in java.awt.image">BufferedImage</A> <B>read</B>(int&nbsp;imageIndex,
                          <A HREF="http://java.sun.com/j2se/1.4/docs/api/javax/imageio/ImageReadParam.html" title="class or interface in javax.imageio">ImageReadParam</A>&nbsp;param)
                   throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Reads the image indexed by .
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>imageIndex</CODE> - The index of the image to be retrieved.<DD><CODE>param</CODE> - Parameters used to control the reading process, or null.
<DT><B>Returns:</B><DD>The desired portion of the image.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE> - if an input operation failed.</DL>
</DD>
</DL>
<HR>

<A NAME="getExpectedRange(int, int)"><!-- --></A><H3>
getExpectedRange</H3>
<PRE>
public <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/util/Range.html" title="class or interface in javax.media.jai.util">Range</A> <B>getExpectedRange</B>(int&nbsp;imageIndex,
                              int&nbsp;bandIndex)
                       throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Returns the expected range of values for a band.
 Calling this method may force loading of full image.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/image/io/SimpleImageReader.html#getExpectedRange(int, int)">getExpectedRange</A></CODE> in class <CODE><A HREF="../../../../org/geotools/image/io/SimpleImageReader.html" title="class in org.geotools.image.io">SimpleImageReader</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>imageIndex</CODE> - The image index.<DD><CODE>bandIndex</CODE> - The band index.
<DT><B>Returns:</B><DD>The expected range of values, or  if unknow.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE> - If an error occurs reading the data information from the input source.</DL>
</DD>
</DL>
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