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yoya/io\_jpeg
=============

JPEG library

v5.0(2y ago)218MITPHPPHP >=5.1.0

Since Dec 8Pushed 2y ago3 watchersCompare

[ Source](https://github.com/yoya/IO_JPEG)[ Packagist](https://packagist.org/packages/yoya/io_jpeg)[ Docs](http://pwiki.awm.jp/~yoya/?IO_JPEG)[ RSS](/packages/yoya-io-jpeg/feed)WikiDiscussions master Synced 2mo ago

READMEChangelog (3)Dependencies (1)Versions (12)Used By (0)

IO\_JPEG
========

[](#io_jpeg)

JPEG parser & dumper

Usage
=====

[](#usage)

```
% composer require yoya/io_jpeg
% php vendor/yoya/io_jpeg/sample/jpegdump.php
Usage: php jpegdump.php [-h] [-D] [-S] -f
% php vendor/yoya/io_jpeg/sample/jpegdump.php -f input.jpg
SOI:
        Start Of Image
APP0: length=16
        identifier:JFIF^@
        verison:1.01
APP2: length=3228
DQT: length=67
        Pq:0(8-bit) Tq:0
        Q[k=0x00]:03 02 02 02 02 02 03 02
        Q[k=0x08]:02 02 03 03 03 03 04 06
        Q[k=0x10]:04 04 04 04 04 08 06 06
        Q[k=0x18]:05 06 09 08 0a 0a 09 08
        Q[k=0x20]:09 09 0a 0c 0f 0c 0a 0b
        Q[k=0x28]:0e 0b 09 09 0d 11 0d 0e
        Q[k=0x30]:0f 10 10 11 10 0a 0c 12
        Q[k=0x38]:13 12 10 13 0f 10 10 10
(omit)

```

###  Health Score

29

—

LowBetter than 60% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity9

Limited adoption so far

Community10

Small or concentrated contributor base

Maturity65

Established project with proven stability

 Bus Factor1

Top contributor holds 97.2% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Every ~223 days

Recently: every ~368 days

Total

11

Last Release

840d ago

Major Versions

v2.5 → v3.02020-01-08

v3.5 → v4.02020-05-09

v4.0 → v5.02024-01-20

### Community

Maintainers

![](https://www.gravatar.com/avatar/b46aabd829c382299018b8def059e03a2546cad928803c5d5dc14d036251f42c?d=identicon)[yoya](/maintainers/yoya)

---

Top Contributors

[![yoya](https://avatars.githubusercontent.com/u/26040?v=4)](https://github.com/yoya "yoya (70 commits)")[![yoya-awm](https://avatars.githubusercontent.com/u/40281283?v=4)](https://github.com/yoya-awm "yoya-awm (2 commits)")

---

Tags

imagejpeg

### Embed Badge

![Health badge](/badges/yoya-io-jpeg/health.svg)

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[![Health](https://phpackages.com/badges/yoya-io-jpeg/health.svg)](https://phpackages.com/packages/yoya-io-jpeg)
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