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Diffstat (limited to 'Doc/libimageop.tex')
| -rw-r--r-- | Doc/libimageop.tex | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/Doc/libimageop.tex b/Doc/libimageop.tex index e5d494d..4a93487 100644 --- a/Doc/libimageop.tex +++ b/Doc/libimageop.tex @@ -17,7 +17,7 @@ per pixel, etc. \end{excdesc} -\begin{funcdesc}{crop}{image\, psize\, width\, height\, x0\, y0\, x1\, y1} +\begin{funcdesc}{crop}{image, psize, width, height, x0, y0, x1, y1} 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 @@ -28,14 +28,14 @@ that fall outside the old image will have their value set to zero. If holds for the y coordinates. \end{funcdesc} -\begin{funcdesc}{scale}{image\, psize\, width\, height\, newwidth\, newheight} +\begin{funcdesc}{scale}{image, psize, width, height, newwidth, newheight} Return \var{image} scaled to size \var{newwidth} by \var{newheight}. No interpolation is done, scaling is done by simple-minded pixel duplication or removal. Therefore, computer-generated images or dithered images will not look nice after scaling. \end{funcdesc} -\begin{funcdesc}{tovideo}{image\, psize\, width\, height} +\begin{funcdesc}{tovideo}{image, psize, width, height} Run a vertical low-pass filter over an image. It does so by computing each destination pixel as the average of two vertically-aligned source pixels. The main use of this routine is to forestall excessive @@ -43,18 +43,18 @@ flicker if the image is displayed on a video device that uses interlacing, hence the name. \end{funcdesc} -\begin{funcdesc}{grey2mono}{image\, width\, height\, threshold} +\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}. \end{funcdesc} -\begin{funcdesc}{dither2mono}{image\, width\, height} +\begin{funcdesc}{dither2mono}{image, width, height} Convert an 8-bit greyscale image to a 1-bit monochrome image using a (simple-minded) dithering algorithm. \end{funcdesc} -\begin{funcdesc}{mono2grey}{image\, width\, height\, p0\, p1} +\begin{funcdesc}{mono2grey}{image, width, height, p0, p1} Convert a 1-bit monochrome image to an 8 bit greyscale or color image. All pixels that are zero-valued on input get value \var{p0} on output and all one-value input pixels get value \var{p1} on output. To @@ -62,26 +62,26 @@ convert a monochrome black-and-white image to greyscale pass the values \code{0} and \code{255} respectively. \end{funcdesc} -\begin{funcdesc}{grey2grey4}{image\, width\, height} +\begin{funcdesc}{grey2grey4}{image, width, height} Convert an 8-bit greyscale image to a 4-bit greyscale image without dithering. \end{funcdesc} -\begin{funcdesc}{grey2grey2}{image\, width\, height} +\begin{funcdesc}{grey2grey2}{image, width, height} Convert an 8-bit greyscale image to a 2-bit greyscale image without dithering. \end{funcdesc} -\begin{funcdesc}{dither2grey2}{image\, width\, height} +\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. \end{funcdesc} -\begin{funcdesc}{grey42grey}{image\, width\, height} +\begin{funcdesc}{grey42grey}{image, width, height} Convert a 4-bit greyscale image to an 8-bit greyscale image. \end{funcdesc} -\begin{funcdesc}{grey22grey}{image\, width\, height} +\begin{funcdesc}{grey22grey}{image, width, height} Convert a 2-bit greyscale image to an 8-bit greyscale image. \end{funcdesc} |