# Web False Color App The **Web False Color App** is a browser-based false color analysis tool that runs entirely in your browser using WebGL. It provides real-time false color overlays for exposure analysis of images — no installation required. **Try it now:** [**https://timeinpixels.com/false-color-app/**](https://timeinpixels.com/false-color-app/)
Web False Color App — ARRI preset with Luminosity mode

Web False Color App — analyzing an image with the ARRI preset

## Getting Started 1. Open the app at 2. Click **Open Image** or drag and drop an image onto the preview area 3. The false color overlay is applied immediately using the default R3D preset Supported image formats: PNG, JPEG, BMP, TIFF, and other formats supported by your browser.
Web False Color App — empty state

The app on first launch with the default R3D preset and IRE scale

## Features ### Presets The app includes 16 built-in false color presets matching popular monitoring hardware: * **R3D** — RED camera false color * **R3D Legacy (version 2.x)** — older RED camera false color * **Flanders** — Flanders Scientific monitors * **SmallHD (50x, 70x)** — SmallHD 500/700 series * **SmallHD (DPx)** — SmallHD DP series * **ARRI** — ARRI camera false color * **Atomos** — Atomos monitors * **Atomos 2** — Atomos monitors (variant) * **BlackMagic Video Assist** — BMD Video Assist * **Zacuto** — Zacuto monitors * **VideoDevices PIX-E4** — Sound Devices PIX-E4 * **VideoDevices PIX-E12** — Sound Devices PIX-E12 * **Skintones** — highlights skin tone exposure ranges * **Highlights** — focus on highlight detail * **Shadows** — focus on shadow detail * **Saturation** — color saturation analysis You can also save and load custom presets as JSON files using the **Save Preset** and **Load Preset** toolbar buttons. ### Analysis Modes Five analysis modes are available from the **Mode** dropdown: * **Luminosity** — standard false color based on pixel luminance (default) * **HDR** — HDR-aware analysis using PQ (ST 2084) transfer function * **Saturation (HSL)** — color saturation using the HSL color model * **Saturation (HSV)** — color saturation using the HSV color model * **Hue** — color hue analysis ### HDR Mode When HDR mode is selected, the app switches to a specialized 6-indicator HDR preset designed for analyzing high dynamic range content. The scale automatically switches to PQ (nits).
Web False Color App — HDR mode

HDR mode with PQ scale — analyzing highlight and shadow regions

HDR mode provides two additional controls: * **Mastering Level** — sets the peak luminance in nits (1000–10000). The red indicator on the scale automatically adjusts to match this level. * **SDR White Level** — selects the SDR reference white point: 100, 203, or 300 nits. The green indicator adjusts accordingly. While in HDR mode, the preset and scale dropdowns are locked to prevent accidental changes. Switching back to another mode restores your previous preset. ### Scale Overlay The vertical scale bar on the left side of the preview shows the color mapping with labeled values. Several scale formats are available: * **IRE** — standard IRE units (0–100%) * **8-bit** — 0–255 range * **10-bit** — 0–1023 range * **mV** — millivolts (analog video) * **PQ (nits)** — ST 2084 perceptual quantizer in nits * **HLG** — Hybrid Log-Gamma The scale is fully interactive: * **Click** on the scale bar to add a new color indicator at that position * **Drag** an existing indicator handle to reposition it * **Middle-click** an indicator handle to delete it * **Click** an indicator to select it and edit its color and properties in a popup ### Opacity & Blur * **Opacity** slider (0–100%) — blend between the false color overlay and the original image. Hold **Space** to temporarily bypass the overlay and see the original. * **Blur** slider (0–45) — apply gaussian blur before analysis, useful for smoothing out noise in the exposure reading. ### Custom Range Enable the **Custom Range** checkbox to overlay two additional color bands on the false color display. This is useful for quickly highlighting a specific exposure range: * Set the **Min** and **Max** percentage values * Choose custom colors for each boundary * The custom range overlays on top of the active preset ### Zoom & Pan * **Scroll wheel** — zoom in/out centered on the cursor * **Middle mouse button drag** (or **Alt + left drag**) — pan the image * **Double-click** or click **Fit** button — reset zoom to fit When zoomed in beyond 100%, a **mini-map** appears in the bottom-right corner showing your current viewport position within the full image, along with the zoom percentage. ### Original Thumbnail When an image is loaded, a small thumbnail of the original (unprocessed) image is displayed in the sidebar under the **Original** section. This provides a quick reference for comparison against the false color overlay. ### LUT Export The app can export the current false color preset as a 3D LUT file for use in other applications: * **Export CUBE** — exports a 65x65x65 .cube LUT file (compatible with DaVinci Resolve, Premiere Pro, and other NLEs) * **Export VLT** — exports a 17x17x17 .vlt LUT file (compatible with Panasonic Varicam and other cameras) LUT export requires a valid license key. Clicking an export button will prompt for license activation if not already licensed. ## State Persistence The app automatically saves your current settings and loaded image to your browser's local storage (IndexedDB). When you return to the app, your previous session is restored including: * Active preset and indicator positions * All slider and dropdown settings * The loaded image * HDR mode settings ## Requirements * A modern web browser with WebGL support (Chrome, Firefox, Safari, Edge) * No installation or plugins required * Works on desktop and laptop computers --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.timeinpixels.com/false-color/false-color-app.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.