simpleimagereader.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

 types to which the given image may be decoded. The default implementation
 returns a singleton containing <A HREF="../../../../org/geotools/image/io/SimpleImageReader.html#getRawImageType(int)"><CODE>getRawImageType(int)</CODE></A>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>imageIndex</CODE> - The index of the image to be retrieved.
<DT><B>Returns:</B><DD>A set of suggested image types for decoding the current given 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 error occurs reading the format information from the input source.</DL>
</DD>
</DL>
<HR>

<A NAME="getRawImageType(int)"><!-- --></A><H3>
getRawImageType</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/javax/imageio/ImageTypeSpecifier.html" title="class or interface in javax.imageio">ImageTypeSpecifier</A> <B>getRawImageType</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 an image type specifier indicating the <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/SampleModel.html" title="class or interface in java.awt.image"><CODE>SampleModel</CODE></A> and <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/ColorModel.html" title="class or interface in java.awt.image"><CODE>ColorModel</CODE></A>
 which most closely represents the "raw" internal format of the image. The default
 implementation returns an image type specifier for a <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/BandedSampleModel.html" title="class or interface in java.awt.image"><CODE>BandedSampleModel</CODE></A> of
 data type <A HREF="../../../../org/geotools/image/io/SimpleImageReader.html#getRawDataType(int)"><CODE>getRawDataType(int)</CODE></A>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>imageIndex</CODE> - The index of the image to be queried.
<DT><B>Returns:</B><DD>The image type (never ).
<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 format information from the input source.</DL>
</DD>
</DL>
<HR>

<A NAME="getRawDataType(int)"><!-- --></A><H3>
getRawDataType</H3>
<PRE>
public int <B>getRawDataType</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 data type which most closely represents the "raw"
 internal data of the image. It should be a constant from
 <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/DataBuffer.html" title="class or interface in java.awt.image"><CODE>DataBuffer</CODE></A>. Common types are <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/DataBuffer.html#TYPE_INT" title="class or interface in java.awt.image"><CODE>DataBuffer.TYPE_INT</CODE></A>,
 <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/DataBuffer.html#TYPE_FLOAT" title="class or interface in java.awt.image"><CODE>DataBuffer.TYPE_FLOAT</CODE></A> and <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/DataBuffer.html#TYPE_DOUBLE" title="class or interface in java.awt.image"><CODE>DataBuffer.TYPE_DOUBLE</CODE></A>.
 The default implementation returns .
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>imageIndex</CODE> - The index of the image to be queried.
<DT><B>Returns:</B><DD>The data type ( by default).
<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 format information
         from the input source.</DL>
</DD>
</DL>
<HR>

<A NAME="getExpectedRange(int, int)"><!-- --></A><H3>
getExpectedRange</H3>
<PRE>
public abstract <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. Implementation
 may read image data, or just returns some raisonable range.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>imageIndex</CODE> - The image index.<DD><CODE>bandIndex</CODE> - The band index. Valid index goes from  inclusive
         to  exclusive. Index are independent
         of any <A HREF="http://java.sun.com/j2se/1.4/docs/api/javax/imageio/IIOParam.html#setSourceBands(int[])" title="class or interface in javax.imageio"><CODE>IIOParam.setSourceBands(int[])</CODE></A> setting.
<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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