Voxel
A voxel is a discrete volumetric element, typically cubical, used to represent spatial data or occupancy in a three-dimensional grid.
Geometry for Programmers
A voxel is a volumetric cell in a regularly sampled three-dimensional grid representing spatial data or material occupancy.
- How it is used
- Represent volumetric images and binary masks for segmentation, morphology, and robust geometric operations.
- How deep it goes
- Defines voxel grids, traces CT values through thresholding, and details distance-based dilation; defers sophisticated segmentation methods.
- Examples
- Uses CT radiodensity, skull thresholding, a binary 2D noise mask, and two-pass distance-map dilation.
- What you can do after
- Apply it via grid operations to segment, dilate, erode, denoise, and compare volumetric models.
Deep Learning with PyTorch, Second Edition
A three-dimensional volume element used to discretize volumetric data.
- How it is used
- Uses voxels to represent CT scans as three-dimensional arrays for medical-image processing.
- How deep it goes
- Defines voxel geometry and density values, then explains coordinate transformation without detailing array-slicing implementation.
- Examples
- Uses CT density visualization, rectangular-prism voxels, and nodule-coordinate conversion as concrete examples.
- What you can do after
- Apply voxel-coordinate transformations to locate anatomy and extract corresponding regions from CT arrays.
Read how Deep Learning with PyTorch, Second Edition explains voxel →
Related concepts
- pixelkind of · A pixel is either a discrete sample carrying visual information at a position in a digital image or a reference unit used to express rendered dimensions.
- segmentation maskequivalent to · A segmentation mask is an image-shaped array that assigns each pixel or spatial element to a class, object, region, or corresponding segmentation value.
- meshcontrasts with · A mesh is a discrete geometric representation composed of interconnected vertices, edges, and faces or other elements covering a shape or region.
- computed tomographyhas part · Computed tomography is an imaging technique that uses multiple X-ray measurements and computational reconstruction to produce cross-sectional or volumetric images.
- 3D imagepart of · A 3D image is a three-dimensional sampled representation of geometry or spatial data arranged as image-like values.
- boolean operationused by · A Boolean operation combines or modifies geometric regions using set-like operations such as union, intersection, and difference.
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