pngtextadd adds text comments to a
PNG image file using
libpng. It's pretty
minimal, but it's surprising how many image manipulation programs lack support
for setting text parts of PNG so with
pngtextadd you can at least
ensure a description or author's name.
Read more in the
online man page.
To build pngtextadd you'll need,
Download version 4 source here, or a Debian package here or from my repo.
pngtextadd-4.tar.gz(19k, and sig)
pngtextadd_4-0.1_i386.deb(8k, and sig)
The deb is built against
iTXt" international text. It should build against
libpng back to at least 1.2 if something else is desired.
Text parts of PNG can also be written with
Image::ExifToolfrom Perl code. It can act on many file formats. Some setups are needed to write non-standard PNG keywords.
Text parts can be displayed with
identifyfrom ImageMagick. It can act on many image formats and also shows technical details about the image content.
pngtoolsshows text parts and basic technical information.
pngmetashows text parts, in a couple of forms.
imagetext.el(mine) in Emacs to display text with images.
This page Copyright 2009, 2010, 2011, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Kevin Ryde,
except for the GPLv3 logo which is Copyright Free Software Foundation
and used here in
accordance with its terms.
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