Plenoview

Plenoview is an OpenEXR image viewer for computational imaging, rendering, and vision workflows. It reveals the rich structure of images that contain more than color, including polarization, spectral, panoramas, depth, and AOVs.

Open Web App Embed

Plenoview interface showing an EXR image, opened files, inspector panels, and channel thumbnails

Downloads

Desktop installers are published from the latest GitHub Release, and the VS Code extension is available from the Visual Studio Marketplace. Unsigned desktop builds may show Windows or macOS security prompts.

Windows x64 NSIS installer Download .exe macOS Apple Silicon DMG Download .dmg VS Code Marketplace extension Open Marketplace

Features

Tools for inspecting, visualizing, exporting, and embedding channel-heavy EXR data.

Inspect

Open files and sample scenes; review metadata and channels.
Probe exact source values with zoom and rulers.
Inspect ROIs, valid samples, and image statistics.

Visualize

Browse RGB, alpha, AOV, spectral, polarization, and grouped channels.
Apply colormaps, exposure, gamma, and range controls.
Switch between image, panorama, and 3D viewing modes.

Export

Save PNG images with the current display settings applied.
Export screenshots, batches, and reproduction metadata.
Generate standalone gradient colorbars for registered colormaps.

Embed

Add <plenoview-viewer> to HTML pages.
Load the viewer with the hosted JavaScript web component.
Share EXR views in docs and project pages.

Gallery

Gallery examples highlight source-value inspection, screenshot export, visualization across RGB, depth, hyperspectral, polarization, and panorama EXR data, plus an embeddable HTML viewer demo.

Plenoview zoomed into an RGB OpenEXR image with a locked pixel probe and pixel rulers at x 195 y 169 — **Source value inspection** Zoom into image data with pixel rulers and lock a probe to read exact source channel values directly from the OpenEXR pixels.

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Plenoview screenshot export mode with two selected screenshot regions and R1 active — **Screenshot export** Select and crop multiple regions from the current view, keep a region active for adjustment, and export pixel exact screenshot crops without interpolation.

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Plenoview visualizing a Stokes vector image with computed AoLP and an automatically applied dedicated colormap — **Polarization visualization** Stokes vector images with `S0`, `S1`, and `S2` are visualized as computed `AoLP` and `DoLP` images, with a dedicated colormap applied automatically. Full-Stokes vector images that include the circular `S3` component also expose `CoP` and `ToP` visualizations.

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Plenoview visualizing hyperspectral EXR data with a locked pixel probe, Display collapsed, and spectral channel thumbnails expanded — **Spectral visualization** Spectral channels are automatically computed into RGB for visualization, while still supporting per-wavelength inspection with a spectral plot and expanded spectral channel thumbnails.
Source: KAIST Hyperspectral Image Dataset.

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Plenoview 3D viewer with a position-map source and a locked pixel probe at x 406 y 300 — **3D view** Switch RGB plus position data into a 3D point-cloud view, tune camera angles and point size, and sample exact color and position values from the source pixels.
Source: Middlebury Stereo Datasets.

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Plenoview panorama view with yaw 5.37 pitch -34 and fov 180 — **Panorama view** Navigate HDRI data in equirectangular format with panorama mode and a wide fov, while sampled view rays still resolve back to exact OpenEXR source pixels.
Source: Poly Haven HDRIs.

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HTML embed Add the hosted JavaScript file and an HTML tag to publish an interactive viewer directly inside HTML pages.

<script src="https://elerac.github.io/plenoview/embed/plenoview.js"></script>

<plenoview-viewer
  src="cbox_rgb.exr"
  height="360">
</plenoview-viewer>

Open Embed Guide

OpenEXR I/O guidance

This viewer groups OpenEXR channels by exact names inside each decoded layer. Use conventional names and complete sets so the viewer can infer color, spectral series, and Stokes-derived polarization views without custom rules.

R/G/B or R/G/B/A for color and alpha.
Spectral channels should end in nm, such as 400nm, 500nm, or reflectance.500nm, so wavelength series can be sorted and grouped.
Stokes data should use complete matching S0/S1/S2 sets, with optional S3; suffixes and wavelengths should match across components.

Open SKILL.md