ORFEO Toolbox (OTB) is an open source library of image processing algorithms. OTB is based on the medical image processing library ITK and offers particular functionalities for remote sensing image processing in general and for high spatial resolution images in particular. Targeted algorithms for high resolution optical images (Pleiades, SPOT, QuickBird, WorldView, Landsat, Ikonos), hyperspectral sensors (Hyperion) or SAR (TerraSarX, ERS, Palsar) are available. All of OTB's algorithms are accessible from other platforms like QGIS, Python, command line, C++, and Monteverdi. Monteverdi is a satellite image viewer with access to OTB processing. Until version 8.1.2, Monteverdi could be included in a single build, but since 9.0.0 version the image viewer is available only a standalone application. If you are interested to the integrated graphic interface, you must refer to OTB-legacy package (available in this repository) otherwise you have to build and install separately the package Monteverdi. OTB will be built with support for the following packages if they are available at compile time: numpy3. Warnings 1. The build fails if Shark is not built against the optional dependency cblas that gives the support to ATLAS. 2. OTB sources in lastest version has changed in several areas and the build could require - at least in some Linux distributions - the launch of post-install scripts to patch the default settings and adapt them to the system environment. This could not be needed in Slackware, but the upgrade is not sufficiently tested in runtime, so please report any issues to the maintainer. You might also consider the installation of the legacy version that is provided by the slackbuild OTB-legacy (v. 8.1.2) that replaces the old OTB package.