exif-js

What is exif-js?

The exif-js npm package is a JavaScript library that allows you to extract EXIF (Exchangeable Image File Format) metadata from image files. This metadata can include information such as the camera model, exposure time, GPS location, and more.

What are exif-js's main functionalities?

Extract EXIF Data

This feature allows you to extract all EXIF metadata from an image file. The code reads an image file and uses the `getData` method to extract the metadata, which is then logged to the console.

const EXIF = require('exif-js');
const fs = require('fs');

fs.readFile('path/to/image.jpg', (err, data) => {
  if (err) throw err;
  EXIF.getData(data, function() {
    const allMetaData = EXIF.getAllTags(this);
    console.log(allMetaData);
  });
});

Get Specific EXIF Tag

This feature allows you to extract a specific EXIF tag from an image file. The code reads an image file and uses the `getTag` method to extract the 'Make' tag, which is then logged to the console.

const EXIF = require('exif-js');
const fs = require('fs');

fs.readFile('path/to/image.jpg', (err, data) => {
  if (err) throw err;
  EXIF.getData(data, function() {
    const make = EXIF.getTag(this, 'Make');
    console.log('Camera Make: ' + make);
  });
});

Get GPS Data

This feature allows you to extract GPS data from an image file. The code reads an image file and uses the `getTag` method to extract the 'GPSLatitude' and 'GPSLongitude' tags, which are then logged to the console.

const EXIF = require('exif-js');
const fs = require('fs');

fs.readFile('path/to/image.jpg', (err, data) => {
  if (err) throw err;
  EXIF.getData(data, function() {
    const gpsData = {
      latitude: EXIF.getTag(this, 'GPSLatitude'),
      longitude: EXIF.getTag(this, 'GPSLongitude')
    };
    console.log('GPS Data: ', gpsData);
  });
});

Other packages similar to exif-js

piexifjs

piexifjs is a JavaScript library for reading and writing EXIF metadata in JPEG images. Unlike exif-js, which focuses on reading EXIF data, piexifjs also allows you to modify and write EXIF data back to the image.

exifr

exifr is a modern JavaScript library for reading EXIF, IPTC, and XMP metadata from image files. It supports a wider range of metadata formats compared to exif-js and is optimized for performance.

jpeg-js

jpeg-js is a pure JavaScript library for decoding and encoding JPEG images. While it does not focus specifically on EXIF metadata, it can be used in conjunction with other libraries to handle image data and metadata.

README

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