tiff2png
Stand-alone module that converts geoTIFF images into 8/16 bit PNG format. Used as part of the preprocessing step for terrain feature extraction. The terrain information (topo-bathymetry) is centered by substracting its mean value and then scaled according to the user-defined parameter max_z. Depending on the output resolution, the maximum value will be mapped to 255 (8 bits PNG) or 65535 (16 bits PNG). Additional parameters allow defining a ROI from the input file that will be extracted and converted.
Features
- Can read any geoTIFF topography or bathymetry map supported by GDAL
- Can export 8/18 bit PNG. Additionally, single channel (grayscale) or 3-channel (RGB) output formats are available
- User defined ROI (Region of Interest) to be exported
- Support CRS projections for Earth(WGS84) and Mars(IAU2000:49901)
- Companion parallel bash script for processing large batches
Installation
Start with installing the following dependencies:
- OpenCV 4.X:
sudo apt install libopencv-contrib-dev libopencv-core-dev libopencv-imgcodecs-dev libopencv-dev
- GDAL 2.X, 3.X
sudo apt install libgdal-dev -y
- yaml-cpp
sudo apt install libyaml-cpp-dev -y
Note: if you have installed OpenCV of GDAL from a different source (e.g. locally compiled), you can still use it defining their corresponding installation paths when running cmake
Then proceed to clone this repository:
git clone --recurse-submodules https://github.com/cappelletto/tiff2png.git
Create a build directory and run CMake
mkdir build
cd build
cmake ..
Finally, complete the compilation and installation (optional)
make -j `nproc --ignore=2`
make install