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image-info-extractor

v0.1.1

Published

A lib to read image info and to extract/parse image metadata

Downloads

48

Readme

Image Info Extractor

A JavaScript lib to read image info and to extract/parse image metadata.

Warning This project is currently experimental.

Features

This lib supports most web image formats: JPEG, PNG, WebP, AVIF, SVG.

Image info reading

Image info reading support: width, height, alpha, bit depth, animation, lossless, rotation, mirror, progressive, grided

Note: the width and height are directly retrieved, you should also look at the rotation and mirror to render an image properly.

Metadata extracting

Metadata extracting support: EXIF, XMP, ICC

Additional extracting support: JFIF, Extended XMP, IPTC for JPEG, XMP in SVG

Table 1: raster image metadata extracting support (Y: yes, N: no)

| Image format \ Metadata format | EXIF | XMP | ICC | | ------------------------------- | ---- | ---- | ---- | | JPEG | Y | Y | Y | | PNG | Y | Y | Y | | WebP | Y | Y | Y | | AVIF | Y | Y | Y |

Metadata parsing

Metadata parsing support: EXIF 2.32, XMP 1.0, ICC 4.4

Optional support:

  • Vendor-specific XMP tag type mapping

TODOs:

  • Vendor-specific EXIF MakerNote parsing

Data getters

  • Thumbnail data in EXIF
  • GPS info in EXIF
  • Date tags in EXIF

demo of Image Info Extractor

demo of Image Info Extractor

Install

Browser Requirements

  • Chromium 80
  • Firefox 113
  • Safari 16.4

Install with NPM

npm install image-info-extractor

Usage

import {readFile, parseResult} from 'image-info-extractor';

// first, pick a file

// then pass the file to extractor
readFile(file).then(parseResult).then((result) => {
  console.log('result', result);
});

For detailed usage, see image-info-extractor and sidecar-file-viewer under examples/

Related Efforts

This project is derived, with heavy modifications, from

  • https://github.com/titarenko/fast-exif
  • https://github.com/devongovett/exif-reader
  • https://github.com/lovell/icc

License

MIT

Copyright © 2023 Fuwei Chin and others