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+<HTML>
+<HEAD>
+<TITLE>
+Introduction to the TIFF Documentation
+</TITLE>
+</HEAD>
+<BODY BGCOLOR=white> 
+<FONT FACE="Arial, Helvetica, Sans">
+<H1>
+<IMG SRC=images/strike.gif WIDTH=128 HEIGHT=100 ALIGN=left HSPACE=6>
+Introduction to the TIFF Documentation
+</H1>
+
+
+<P>
+The following definitions are used throughout this documentation.
+They are consistent with the terminology used in the TIFF 6.0 specification.
+
+<DL>
+<DT><I>Sample</I>
+<DD>The unit of information stored in an image; often called a
+  channel elsewhere.  Sample values are numbers, usually unsigned
+  integers, but possibly in some other format if the SampleFormat
+  tag is specified in a TIFF
+<DT><I>Pixel</I>
+<DD>A collection of one or more samples that go together.
+<DT><I>Row</I>
+<DD>An Nx1 rectangular collection of pixels.
+<DT><I>Tile</I>
+<DD>An NxM rectangular organization of data (or pixels).
+<DT><I>Strip</I>
+<DD>A tile whose width is the full image width.
+<DT><I>Compression</I>
+<DD>A scheme by which pixel or sample data are stored in
+  an encoded form, specifically with the intent of reducing the
+  storage cost.
+<DT><I>Codec</I>
+<DD>Software that implements the decoding and encoding algorithms
+  of a compression scheme.
+</UL>
+
+<P>
+In order to better understand how TIFF works (and consequently this
+software) it is important to recognize the distinction between the
+physical organization of image data as it is stored in a TIFF and how
+the data is interpreted and manipulated as pixels in an image.  TIFF
+supports a wide variety of storage and data compression schemes that
+can be used to optimize retrieval time and/or minimize storage space.
+These on-disk formats are independent of the image characteristics; it
+is the responsibility of the TIFF reader to process the on-disk storage
+into an in-memory format suitable for an application.  Furthermore, it
+is the responsibility of the application to properly interpret the
+visual characteristics of the image data.  TIFF defines a framework for
+specifying the on-disk storage format and image characteristics with
+few restrictions.  This permits significant complexity that can be
+daunting.  Good applications that handle TIFF work by handling as wide
+a range of storage formats as possible, while constraining the
+acceptable image characteristics to those that make sense for the
+application.
+
+
+<P>
+<HR>
+
+Last updated: $Date: 1999/08/09 20:21:21 $
+
+</BODY>
+</HTML>