52 lines
1.5 KiB
TeX
52 lines
1.5 KiB
TeX
\section{Introduction}
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\mylabel{sec:appl}
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This chapter explains how to call VIPS functions from C programs. It does not
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explain how to write new image processing operations (See \pref{sec:oper}),
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only how to call the ones that VIPS provides. If you want to call VIPS
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functions from C++ programs, you can either use the interface described here
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or you can try out the much nicer C++ interface described in \pref{sec:cpp}.
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See \pref{sec:ref} for an introduction to the image processing operations
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available in the library. \fref{fg:architecture} tries to show
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an overview of this structure.
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\begin{fig2}
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\figw{5in}{arch.png}
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\caption{VIPS software architecture}
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\label{fg:architecture}
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\end{fig2}
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VIPS includes a set of UNIX manual pages. Enter (for example):
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\begin{verbatim}
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example% man im_extract
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\end{verbatim}
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\noindent
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to get an explanation of the \verb+im_extract()+ function.
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All the comand-line vips operations will print help text too. For example:
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\begin{verbatim}
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example% vips im_extract
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usage: vips im_extract input output
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left top width height band
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where:
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input is of type "image"
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output is of type "image"
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left is of type "integer"
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top is of type "integer"
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width is of type "integer"
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height is of type "integer"
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band is of type "integer"
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extract area/band, from package
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"conversion"
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flags: (PIO function)
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(coordinate transformer)
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(area operation)
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(result can be cached)
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vips: error calling function
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im_run_command: too few arguments
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\end{verbatim}
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