Glossary

This glossary defines the principal computing and imaging terms used throughout the Holoflow documentation.

Term	Expansion	Meaning
CPU	Central processing unit	The general-purpose processor that runs host code and coordinates work submitted to accelerators.
CUDA	—	NVIDIA's parallel computing platform and programming model for GPU acceleration.
DAG	Directed acyclic graph	A directed graph without cycles, used by Holoflow to represent task and tensor dependencies.
DMA	Direct memory access	Hardware-supported data transfer that proceeds without continuous CPU intervention.
FFT	Fast Fourier transform	An efficient algorithm for computing a discrete Fourier transform.
GPU	Graphics processing unit	A massively parallel processor used to accelerate numerical workloads.
GPSC	General-purpose scientific computing	Scientific computation infrastructure intended to support multiple domains and processing methods.
HPC	High-performance computing	The use of highly parallel or specialized computing resources for demanding workloads.
LDH	Laser Doppler holography	A full-field optical imaging method that uses holographic detection and Doppler analysis to visualize blood flow.
PCA	Principal component analysis	A dimensionality-reduction method that projects data onto orthogonal components.
RAII	Resource acquisition is initialization	A C++ lifetime-management technique that binds resource ownership to object lifetime.
ROI	Region of interest	A selected spatial subset of an image or tensor used for focused processing or measurement.
STFT	Short-time Fourier transform	A Fourier analysis performed over successive time windows to describe changing frequency content.
GUI	Graphical user interface	A visual interface that allows users to interact with an application through controls, windows, and graphical elements.