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43 lines
1.5 KiB
TeX
43 lines
1.5 KiB
TeX
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\chapter{FAQ}
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\section{First Section}
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\subsection{Initialization}
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\subsubsection*{CreateImage}
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\addcontentsline{toc}{subsubsection}{CreateImage}
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Creates header and \textsf{allocates} data
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\begin{shaded}
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\begin{verbatim}
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IplImage* cvCreateImage( CvSize size,
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int depth,
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int channels );
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\end{verbatim}
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\end{shaded}
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\begin{description}
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\item[\texttt{size}] Image width and height
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\item[\texttt{depth}] Bit depth of image elements. Can be one of:
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\begin{description}
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\item[IPL\_DEPTH\_8U] unsigned 8-bit integers
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\item[IPL\_DEPTH\_8S] signed 8-bit integers
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\item[IPL\_DEPTH\_16U] unsigned 16-bit integers
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\item[IPL\_DEPTH\_16S] signed 16-bit integers
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\item[IPL\_DEPTH\_32S] signed 32-bit integers
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\item[IPL\_DEPTH\_32F] single precision floating-point numbers
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\item[IPL\_DEPTH\_64F] double precision floating-point numbers
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\end{description}
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\item[\texttt{channels}] Number of channels per element(pixel). Can be 1, 2, 3 or 4. The channels are interleaved, for example the usual data layout of a color image is:
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\begin{lstlisting}
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b0 g0 r0 b1 g1 r1 ...
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\end{lstlisting}
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Although in general IPL image format can store non-interleaved images as well and some of OpenCV can process it, this function can create interleaved images only.
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\end{description}
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The function cvCreateImage creates the header and allocates data as in the method of~\cite{author_conf_year}. This call is a shortened form of
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\begin{lstlisting}
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header = cvCreateImageHeader(size,depth,channels);
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cvCreateData(header);
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\end{lstlisting}
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