#  [](https://www.npmjs.com/package/@thi.ng/pixel-io-pfm)  [](https://mastodon.thi.ng/@toxi) > [!NOTE] > This is one of 215 standalone projects. LLM-free, human-made and > cared for software, maintained as part of the > [@thi.ng/umbrella](https://codeberg.org/thi.ng/umbrella/) ecosystem and > anti-framework. > > 🚀 Please help me to work full-time on these projects by [sponsoring > me](https://codeberg.org/thi.ng/umbrella/src/branch/develop/CONTRIBUTING.md#donations). > Thank you! ❤️ - [About](#about) - [Status](#status) - [Installation](#installation) - [Dependencies](#dependencies) - [API](#api) - [Authors](#authors) - [License](#license) ## About Portable FloatMap image format support for [@thi.ng/pixel](https://codeberg.org/thi.ng/umbrella/src/branch/develop/packages/pixel). Similar to the [NetPBM formats](https://codeberg.org/thi.ng/umbrella/src/branch/develop/packages/pixel-io-netpbm), the [Portable FloatMap image format](https://pauldebevec.com/Research/HDR/PFM/) is extremely simple, uncompressed and mainly interesting for development purposes & interchange (e.g. for use with Intel's [Open Image Denoise CLI tools](https://github.com/OpenImageDenoise/oidn)). ## Status **STABLE** - used in production [Search or submit any issues for this package](https://codeberg.org/thi.ng/umbrella/issues?q=%5Bpixel-io-pfm%5D) ## Installation ```bash yarn add @thi.ng/pixel-io-pfm ``` ESM import: ```ts import * as pfm from "@thi.ng/pixel-io-pfm"; ``` Browser ESM import: ```html ``` [JSDelivr documentation](https://www.jsdelivr.com/) For Node.js REPL: ```js const pfm = await import("@thi.ng/pixel-io-pfm"); ``` Package sizes (brotli'd, pre-treeshake): ESM: 694 bytes ## Dependencies - [@thi.ng/errors](https://codeberg.org/thi.ng/umbrella/src/branch/develop/packages/errors) - [@thi.ng/pixel](https://codeberg.org/thi.ng/umbrella/src/branch/develop/packages/pixel) ## API [Generated API docs](https://docs.thi.ng/umbrella/pixel-io-pfm/) The package only provides 2 functions: - [`asPFM(img: IntBuffer | FloatBuffer, littleEndian?: boolean, linearRGB?: boolean): Uint8Array`](https://docs.thi.ng/umbrella/pixel-io-pfm/functions/asPFM.html): Serializes an image to PFM and returns result as byte array - [`readPFM(buf: Uint8Array, linearRGB?: boolean): FloatBuffer`](https://docs.thi.ng/umbrella/pixel-io-pfm/functions/readPFM.html): Parses byte array as PFM image and returns it as [`FloatBuffer`](https://docs.thi.ng/umbrella/pixel/classes/FloatBuffer.html) ```ts tangle:export/readme.ts import { intBuffer, RGB888 } from "@thi.ng/pixel"; import { asPFM } from "@thi.ng/pixel-io-pfm"; import { writeFileSync } from "node:fs"; // create 2x2 image const img = intBuffer(2, 2, RGB888); // set all 4 pixels (in order: red, green, blue, yellow) img.data.set([0xff0000, 0x00ff00, 0x0000ff, 0xffff00]); // serialize image to PFM byte array and write to file // (format conversion to FLOAT_RGB is done automatically & non-destructively) writeFileSync("export/rgby.pfm", asPFM(img)); ``` ## Authors - [Karsten Schmidt](https://thi.ng) If this project contributes to an academic publication, please cite it as: ```bibtex @misc{thing-pixel-io-pfm, title = "@thi.ng/pixel-io-pfm", author = "Karsten Schmidt", note = "https://thi.ng/pixel-io-pfm", year = 2023 } ``` ## License © 2023 - 2026 Karsten Schmidt // Apache License 2.0