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Diffstat (limited to 'Doc/libimageop.tex')
| -rw-r--r-- | Doc/libimageop.tex | 28 |
1 files changed, 13 insertions, 15 deletions
diff --git a/Doc/libimageop.tex b/Doc/libimageop.tex index 4a93487..c21be48 100644 --- a/Doc/libimageop.tex +++ b/Doc/libimageop.tex @@ -1,16 +1,14 @@ -\section{Built-in Module \sectcode{imageop}} +\section{Built-in Module \module{imageop}} \label{module-imageop} \bimodindex{imageop} -The \code{imageop} module contains some useful operations on images. -It operates on images consisting of 8 or 32 bit pixels -stored in Python strings. This is the same format as used -by \code{gl.lrectwrite} and the \code{imgfile} module. +The \module{imageop} module contains some useful operations on images. +It operates on images consisting of 8 or 32 bit pixels stored in +Python strings. This is the same format as used by +\function{gl.lrectwrite()} and the \module{imgfile} module. The module defines the following variables and functions: -\setindexsubitem{(in module imageop)} - \begin{excdesc}{error} This exception is raised on all errors, such as unknown number of bits per pixel, etc. @@ -21,11 +19,11 @@ per pixel, etc. Return the selected part of \var{image}, which should by \var{width} by \var{height} in size and consist of pixels of \var{psize} bytes. \var{x0}, \var{y0}, \var{x1} and \var{y1} are like -the \code{lrectread} parameters, i.e.\ the boundary is included in the -new image. The new boundaries need not be inside the picture. Pixels -that fall outside the old image will have their value set to zero. If -\var{x0} is bigger than \var{x1} the new image is mirrored. The same -holds for the y coordinates. +the \function{gl.lrectread()} parameters, i.e.\ the boundary is +included in the new image. The new boundaries need not be inside the +picture. Pixels that fall outside the old image will have their value +set to zero. If \var{x0} is bigger than \var{x1} the new image is +mirrored. The same holds for the y coordinates. \end{funcdesc} \begin{funcdesc}{scale}{image, psize, width, height, newwidth, newheight} @@ -46,7 +44,7 @@ interlacing, hence the name. \begin{funcdesc}{grey2mono}{image, width, height, threshold} Convert a 8-bit deep greyscale image to a 1-bit deep image by tresholding all the pixels. The resulting image is tightly packed and -is probably only useful as an argument to \code{mono2grey}. +is probably only useful as an argument to \function{mono2grey()}. \end{funcdesc} \begin{funcdesc}{dither2mono}{image, width, height} @@ -74,8 +72,8 @@ dithering. \begin{funcdesc}{dither2grey2}{image, width, height} Convert an 8-bit greyscale image to a 2-bit greyscale image with -dithering. As for \code{dither2mono}, the dithering algorithm is -currently very simple. +dithering. As for \function{dither2mono()}, the dithering algorithm +is currently very simple. \end{funcdesc} \begin{funcdesc}{grey42grey}{image, width, height} |