Prerequisites: Java 8 and Maven 3.0.5
Download Apache Karaf 4.0.8, extract and startup
https://karaf.apache.org/download.html
Build this project root with mvn:install producing a Karaf Archive file (kar-1.0.0.kar)
Drop this file into the deploy folder found under the Karaf main folder to install all needed bundles at once. The Karaf console will output the following:
#####Default registered image readers: [image/vnd.wap.wbmp, image/png, image/x-png, image/jpeg, image/bmp, image/gif]
#####Default registered image writers: [image/png, image/vnd.wap.wbmp, image/x-png, image/jpeg, image/bmp, image/gif]
#####Spi Fly / twelvemonkeys registered image readers: [image/cursor, image/vnd.wap.wbmp, image/vnd.adobe.photoshop, image/x-dcx, image/jpeg, image/x-targa, image/pict, image/x-cursor, image/bmp, image/x-icon, image/x-thumbs-db, image/gif, image/x-photoshop, image/tga, image/x-pcx, image/x-tga, image/x-portable-arbitrarymap, image/x-sgi, image/iff, image/png, application/octet-stream, image/pcx, application/x-photoshop, application/vnd.adobe.photoshop, image/x-psd, image/x-bmp, image/vnd.microsoft.cursor, image/dcx, image/x-iff, image/x-png, image/x-portable-pixmap, image/tiff, image/x-tiff, image/ico, image/sgi, image/targa, image/x-portable-anymap, image/x-pict, image/vnd.microsoft.icon, image/vnd.radiance] #####Spi Fly / twelvemonkeys registered image writers: [image/png, image/iff, image/vnd.wap.wbmp, image/jpeg, image/pict, image/bmp, image/gif, image/x-png, image/x-iff, image/x-portable-pixmap, image/tiff, image/x-tiff, image/x-portable-anymap, image/x-pict, image/x-portable-arbitrarymap]
To display the standard ImageIO setup uninstall the publisher and Spi-Fly bundle and a restart of Karaf.
###twelvemonkeys-osgi License
Copyright (C) 2016 Maurice Betzel
Licensed either under the Apache License, Version 2.0, or (at your option) under the terms of the GNU General Public License as published by the Free Software Foundation (subject to the "Classpath" exception), either version 2, or any later version (collectively, the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
http://www.gnu.org/licenses/
http://www.gnu.org/software/classpath/license.html
or as provided in the LICENSE.txt file that accompanied this code. Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
###twelvemonkeys:
https://github.com/haraldk/TwelveMonkeys/tree/twelvemonkeys-3.3.2