During import, some transfer syntaxes retain their original encoding, while others are transcoded to High-Throughput JPEG 2000 (HTJ2K) lossless by default. HTJ2K delivers consistently fast image display and universal access to HTJ2K’s advanced features. Because some image frames are encoded in HTJ2K during import, they must be decoded prior to viewing in an image viewer. For information about determining transfer syntaxes, see Supported transfer syntaxes.
Note
HTJ2K is defined in Part 15 of the
JPEG2000 standard (ISO/IEC 15444-15:2019)
HTJ2K decoding libraries
Depending on your programming language, we recommend the following decoding libraries to decode image frames.
-
NVIDIA nvJPEG2000
– Commercial, GPU-accelerated -
Kakadu Software
– Commercial, C++ with Java and .NET bindings -
OpenJPH
– Open source, C++ and WASM -
OpenJPEG
– Open source, C/C++, Java -
openjphpy
– Open source, Python -
pylibjpeg-openjpeg
– Open source, Python
Image viewers
You can view image frames after you've decoded them. AWS HealthImaging API actions support a variety of open-source image viewers, including:
