This is the command rdjpgcom that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
rdjpgcom - display text comments from a JPEG file
SYNOPSIS
rdjpgcom [ -raw ] [ -verbose ] [ filename ]
DESCRIPTION
rdjpgcom reads the named JPEG/JFIF file, or the standard input if no file is named, and
prints 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 doesn't actually define what COM blocks are for, they are widely used to hold
user-supplied text strings. This lets you add annotations, titles, index terms, etc to
your JPEG files, and later retrieve them 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
as many of them as you like in one JPEG file.
OPTIONS
-raw Normally rdjpgcom escapes non-printable characters in comments, for security
reasons. This option avoids that.
-verbose Causes rdjpgcom to also display the JPEG image dimensions.
Switch names may be abbreviated, and are not case sensitive.
HINTS
rdjpgcom does not depend on the IJG JPEG library. Its source code is intended as an
illustration of the minimum amount of code required to parse a JPEG file header correctly.
In -verbose mode, rdjpgcom will also attempt to print the contents of any "APP12" markers
as text. Some digital cameras produce APP12 markers containing useful textual
information. If you like, you can modify the source code to print other APPn marker types
as well.
Use rdjpgcom online using onworks.net services
