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Document -rgb option in djpeg man page; "gray-scale"="grayscale"

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git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1293 632fc199-4ca6-4c93-a231-07263d6284db
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DRC
2014-05-12 09:08:39 +00:00
parent 333e9187c8
commit 90d6c3824b
6 changed files with 24 additions and 21 deletions
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18
usage.txt
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@@ -17,7 +17,7 @@ INTRODUCTION
These programs implement JPEG image encoding, decoding, and transcoding.
JPEG (pronounced "jay-peg") is a standardized compression method for
full-color and gray-scale images.
full-color and grayscale images.
GENERAL USAGE
@@ -50,7 +50,7 @@ or
This syntax works on all systems, so it is useful for scripts.
The currently supported image file formats are: PPM (PBMPLUS color format),
PGM (PBMPLUS gray-scale format), BMP, Targa, and RLE (Utah Raster Toolkit
PGM (PBMPLUS grayscale format), BMP, Targa, and RLE (Utah Raster Toolkit
format). (RLE is supported only if the URT library is available.)
cjpeg recognizes the input image format automatically, with the exception
of some Targa-format files. You have to tell djpeg which format to generate.
@@ -271,7 +271,7 @@ The basic command line switches for djpeg are:
highest quality output.) Currently, this is equivalent
to "-dct fast -nosmooth -onepass -dither ordered".
-grayscale Force gray-scale output even if JPEG file is color.
-grayscale Force grayscale output even if JPEG file is color.
Useful for viewing on monochrome displays; also,
djpeg runs noticeably faster in this mode.
@@ -284,7 +284,7 @@ The basic command line switches for djpeg are:
-bmp Select BMP output format (Windows flavor). 8-bit
colormapped format is emitted if -colors or -grayscale
is specified, or if the JPEG file is gray-scale;
is specified, or if the JPEG file is grayscale;
otherwise, 24-bit full-color format is emitted.
-gif Select GIF output format. Since GIF does not support
@@ -294,18 +294,18 @@ The basic command line switches for djpeg are:
-os2 Select BMP output format (OS/2 1.x flavor). 8-bit
colormapped format is emitted if -colors or -grayscale
is specified, or if the JPEG file is gray-scale;
is specified, or if the JPEG file is grayscale;
otherwise, 24-bit full-color format is emitted.
-pnm Select PBMPLUS (PPM/PGM) output format (this is the
default format). PGM is emitted if the JPEG file is
gray-scale or if -grayscale is specified; otherwise
grayscale or if -grayscale is specified; otherwise
PPM is emitted.
-rle Select RLE output format. (Requires URT library.)
-targa Select Targa output format. Gray-scale format is
emitted if the JPEG file is gray-scale or if
-targa Select Targa output format. Grayscale format is
emitted if the JPEG file is grayscale or if
-grayscale is specified; otherwise, colormapped format
is emitted if -colors is specified; otherwise, 24-bit
full-color format is emitted.
@@ -367,7 +367,7 @@ Switches for advanced users:
The one-pass method is faster and needs less memory,
but it produces a lower-quality image. -onepass is
ignored unless you also say -colors N. Also,
the one-pass method is always used for gray-scale
the one-pass method is always used for grayscale
output (the two-pass method is no improvement then).
-maxmemory N Set limit for amount of memory to use in processing