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- Introduction to the TIFF Documentation
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- Introduction to the TIFF Documentation
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- 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.
- </DL>
- <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.
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- Last updated: $Date: 2016-09-25 20:05:44 $
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