JPEG(3) perl/Tk Documentation JPEG(3)NAME
Tk::JPEG - JPEG loader for Tk::Photo
SYNOPSIS
use Tk;
use Tk::JPEG;
my $image = $widget->Photo('-format' => 'jpeg', -file => 'something.jpg');
DESCRIPTION
This is an extension for Tk which supplies JPEG format loader for Photo image type.
JPEG access is via release 5 of the The Independent JPEG Group's (IJG) free JPEG software.
HISTORY
This extension works for Tk800.015 and later and is by default bundled with Perl/Tk since Tk804.
AUTHOR
Nick Ing-Simmons <nick@ing-simmons.net>
SEE ALSO
Tk::Photo.
Tk4.003 2007-05-05 JPEG(3)
Check Out this Related Man Page
rdjpgcom(1) User Commands rdjpgcom(1)NAME
rdjpgcom - display text comments from a JPEG file
SYNOPSIS
rdjpgcom [-verbose] [filename]
DESCRIPTION
rdjpgcom reads the named JPEG or JFIF file, or the standard input if no file is named, and displays any text comments found in the file on
the standard output.
The JPEG standard allows "comment" (COM) blocks to occur within a JPEG file. Although the standard does not actually define the intended
function of COM blocks, they are widely used to hold user-supplied text strings. This enables you to add annotations, titles, index terms,
and so on to your JPEG files, and later retrieve the COM blocks as text. COM blocks do not interfere with the image stored in the JPEG
file. The maximum size of a COM block is 64K, but you can have many COM blocks in one JPEG file.
OPTIONS
The following options are supported:
-verbose Causes rdjpgcom to also display the JPEG image dimensions.
OPERANDS
The following operands are supported:
filename The name of the JPEG file that contains text comments.
EXTENDED DESCRIPTION
rdjpgcom does not depend on the IJG JPEG library. The rdjpgcom source code is intended to illustrate the minimum amount of code required to
parse a JPEG file header correctly.
In -verbose mode, rdjpgcom also attempts to display the contents of any "APP12" markers as text. Some digital cameras produce APP12 markers
that contain useful textual information. You can also modify the source code to display other APPn marker types.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWjpg |
+-----------------------------+-----------------------------+
|Interface stability |External |
+-----------------------------+-----------------------------+
SEE ALSO cjpeg(1), djpeg(1), jpegtran(1), wrjpgcom(1)NOTES
This man page was originally written by the Independent JPEG Group. Updated by Breda McColgan, Sun Microsystems Inc., 2004.
SunOS 5.10 26 Mar 2004 rdjpgcom(1)
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