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decode-tiff
Advanced tools
decode-tiff
:zap: A lightweight pure JavaScript TIFF decoder. :art:
How to use it
With Node.js
npm i tiff-decode
The following example reads .tiff and converts to .png file using pngjs.
const { decode } = require("decode-tiff");
const { PNG } = require("pngjs");
const fs = require("fs");
const { width, height, data } = decode(fs.readFileSync(__dirname + "/lena_color.tiff"));
const png = new PNG({ width, height });
png.data = data;
fs.writeFileSync(__dirname + "/lena.png", PNG.sync.write(png));
With Browser
Download script file from dist/decode-tiff.min.js. Alternatively you can use Module Bundler, such as webpack, Browserify, and Rollup.
This example shows metadata of the dropped file. Working demonstration is here.
<html>
<head></head>
<body>
<div id="drop">
<p>Drop TIFF file here!</p>
</div>
<script src="decode-tiff.min.js"></script>
<script>
const { decode } = window.decodeTiff;
const elm = document.getElementById("drop");
elm.addEventListener("dragenter", e => e.preventDefault());
elm.addEventListener("dragover", e => e.preventDefault());
elm.addEventListener("drop", e => {
e.preventDefault();
const file = e.dataTransfer.files[0];
const reader = new FileReader();
reader.addEventListener("load", e => {
const arrayBuffer = e.target.result;
const { width, height, ifdEntries } = decode(arrayBuffer);
const metadata = JSON.stringify({ width, height, ifdEntries }, null, 2);
elm.innerHTML = `<pre>${metadata}</pre>`;
});
reader.readAsArrayBuffer(file);
});
</script>
</body>
</html>
API
decode(buffer: ArrayBuffer | Buffer, options?: { singlePage?: boolean }): TiffImage | TiffImage[]
- params
buffer- Required - Buffer of the target TIFF image. Node.js Buffer and ECMA Script's ArrayBuffer are acceptable.options.singlePage- Optional (default:true) - If true, this function returns a single TiffImage object. If the input has 2 or more pages, return value will be the first page.
- returns
TiffImage- An object.TiffImage.width- number - Width of the input image.TiffImage.height- number - Height of the input image.TiffImage.data- Uint8Array - Image pixel data. Every pixel consists 4 bytes: R, G, B, A (opacity)TiffImage.ifdEntries- {[key: string]: Array} - Each IFD entries of the input image.
Compatibility
- Byte Order
- Little endian
- Big endian
- Color resolusion
- 32bit Full Colors
- 24bit Full Colors
- 8bit Gray scale
- 4bit Gray scale
- Palette-Color
- Bilevel(white)
- Bilevel(black)
- Compression
- No Compression
- CCITT Group 3
- LZW Compression
- ZIP
- Packbits
- Masking
- Transparency Mask
License
MIT. See LICENSE.txt.
FAQs
Lightweight tiff decoder
The npm package decode-tiff receives a total of 85,484 weekly downloads. As such, decode-tiff popularity was classified as popular.
We found that decode-tiff demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
Package last updated on 18 Jul 2017
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
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