Optical Imaging & Light Transport

← Back to Domain-Specific Families

Abstractions about how light, images, and radiation are captured, projected, and rendered, covering imaging and projection geometry (3D projection, image rectification, visual hull, shape from focus), radiative and light-transport models (physical optics, path tracing), and measurement techniques like spectrophotometry.

27 abstractions in this family — domain-specific abstractions that sit near one another in structural-signature space (k-means over structural-signature embeddings). Each is shown with its short description.

• 3D projection — A mapping that represents three-dimensional geometry on a two-dimensional surface under explicit perspective, orthographic, oblique, or related projection rules.
• Astronomical optical interferometry — An observing method coherently combining optical or infrared light from separated apertures to measure spatial Fourier information at very high angular resolution.
• Cropping (image) — The removal of peripheral regions from an image or moving-image frame to change composition, framing, aspect ratio, or subject emphasis.
• Friis transmission equation — An ideal free-space relation linking received power to transmitted power, antenna gains, wavelength, and separation.
• Henyey–Greenstein phase function — A one-parameter angular scattering distribution whose asymmetry factor interpolates among backward isotropic and forward scattering.
• Image rectification — A geometric transformation that maps images into a common plane so corresponding scene points align along simplified search loci.
• Interlaced video — A video scanning method that transmits alternating odd- and even-line fields captured at successive times, increasing field rate and perceived motion smoothness within limited bandwidth.
• Jones diagram — A multiaxis Cartesian chart whose paired directions represent related photographic variables so equivalent field of view and image-format choices can be compared graphically.
• Legendre moment — An image descriptor obtained by projecting image intensity onto a two-dimensional orthogonal Legendre-polynomial basis.
• Local maximum intensity projection — Render volumetric data by tracing each viewing ray and selecting the first threshold-qualified local intensity maximum, preserving depth order that global maximum projection discards.
• Lumen method — A simplified lighting-design calculation that estimates average horizontal illuminance from lamp lumens, utilization and maintenance factors over an area.
• Method of image charges — An electrostatic solution method that replaces conductor boundaries with fictitious charges chosen to reproduce the required boundary conditions.
• Metropolis light transport — A global-illumination rendering method that uses Metropolis-Hastings mutations of complete light-transport paths to concentrate samples on image contributions that are difficult to find independently.
• Optical space — A coordinate-bearing mathematical view of an optical system associated with a refractive region such as object, image or intermediate space.
• Physical optics — The treatment of optical propagation as waves so interference, diffraction and polarization are retained beyond geometric rays.
• Pole figure — A stereographic or equal-area projection showing the orientation distribution of selected crystallographic plane normals or directions relative to a specimen frame.
• Schema for horizontal dials — A compass-and-straightedge geometric construction that projects an equatorial sundial’s hour divisions onto a horizontal dial for a specified latitude.
• Schwarzschild's equation for radiative transfer — The differential balance of absorption and thermal emission for spectral radiation traveling through a nonscattering medium in local thermodynamic equilibrium.
• Screen-door effect — A display artifact in which the nonemissive gaps between pixels or subpixels become visibly resolved as a dark grid over the image.
• Shape from focus — A three-dimensional reconstruction method that estimates scene depth from how image focus or defocus changes across a stack of differently focused views.
• Spectrophotometry — Quantitative measurement of a material's wavelength-dependent transmission, reflection or absorbance by comparing incident and detected electromagnetic intensity.
• Transparency and translucency — Optical transmission properties distinguished by scattering: transparent media preserve image-forming direction through the material, while translucent media transmit light but diffuse spatial detail.
• Trimetrogon — An aerial-photographic survey configuration using one vertical and two symmetrically oblique cameras to obtain overlapping horizon-to-horizon terrain coverage suitable for stereoscopic mapping.
• Two-ray ground-reflection model — A radio-propagation model that approximates received field as the coherent sum of one direct line-of-sight ray and one specular ground-reflected ray.
• Virtual image — A real image is the collection of focus points made by real converging rays, while a virtual image is the collection of focus points made by backward extensions of real diverging rays.
• Visual hull — The maximal three-dimensional shape consistent with a set of calibrated object silhouettes, formed by intersecting their back-projected silhouette cones.
• Volumetric path tracing — A Monte Carlo rendering method that samples light-transport paths through scattering and absorbing participating media as well as surfaces.