scanlib 1.3.0

A multiplatform document scanning library for Python

scanlib

A multiplatform document scanning library for Python with platform-native scanning backends and minimal dependencies.

Features

• Cross-platform — unified API across Windows (WIA 2.0), macOS (ImageCaptureCore), and Linux (SANE)
• eSCL / AirScan — direct HTTP scanning of network scanners without OS drivers, enabled automatically on Linux and Windows
• Command-line interface — scanlib list, scanlib info, and scanlib scan for quick scanning from the shell
• Output to PDF — assemble scanned pages into a PDF and control page encoding (JPEG or PNG)
• Minimal dependencies — no external image or PDF processing libraries; JPEG uses platform-native encoders, PNG uses stdlib zlib, PDF assembly uses only the standard library
• Multi-page scanning — automatic document feeder support and flatbed multi-page with a simple callback
• Page-level control — preview, rotate, reorder, and encode individual pages as JPEG or PNG before assembling the final PDF
• Thread-safe — call from any thread; backend threading is handled internally
• Progress & cancellation — monitor scan progress and abort mid-scan via callback

Backends

Platform	Backend	Scanner types	eSCL	System packages
macOS 10.7+	ImageCaptureCore	USB + network	Opt-in (SCANLIB_ESCL=1)	None
Windows 10+	WIA 2.0	USB + network	Always enabled	None
Linux	SANE	USB	Always enabled	libsane-dev libjpeg-dev

The eSCL (AirScan) backend discovers and drives network scanners directly over HTTP — no OS-level scanner drivers needed. On Linux and Windows it runs alongside the platform backend automatically, and a network scanner found by both is reported once (matched by device UUID or IP), preferring the platform driver. On macOS, ImageCaptureCore already handles network scanners natively, so eSCL is opt-in. Set SCANLIB_ESCL=1 to enable eSCL on macOS, or — on any platform — to prefer the eSCL driver over the platform driver for scanners seen by both.

Installation

pip install scanlib

Python 3.9+. Pre-built wheels available for all major platforms. On Linux, SANE and libjpeg must be installed at the system level:

# Debian / Ubuntu
apt install libsane-dev libjpeg-dev

# Fedora / RHEL
dnf install sane-backends libjpeg-turbo-devel

On macOS and Windows, no additional system packages are required.

Quick Start

Command line

# List available scanners
scanlib list

# Show scanner capabilities
scanlib info -s 0

# Scan to PDF
scanlib scan -o document.pdf --dpi 300 --color-mode gray

# Multi-page flatbed scan with interactive prompting
scanlib scan -o multipage.pdf --pages ask

Python API

import scanlib

scanners = scanlib.list_scanners()

with scanners[0] as scanner:
    doc = scanner.scan()

with open("output.pdf", "wb") as f:
    f.write(doc.data)

Documentation

Full documentation is available at python-scanlib.readthedocs.io.

About

Created by Angelo Mottola, with the help of Claude Code.

This project was started to fill a void in the Python scanning ecosystem, which I found to be very much fragmented. It is also my first experiment in heavily AI-assisted software development (I still hesitate to use the term "vibe" coding), where I mostly did code review and direction.

License

MIT