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blind-watermark

library0.4.4pypypi✓ verified 84d ago

A Python library for embedding and extracting blind digital watermarks in images using DWT-DCT-SVD based algorithm. Current version 0.4.4, released irregularly.

data serialization

pip install blind-watermark

github ↗package ↗

INSTALL

IMPORT

SIG · BLIND-WATERMARK

blind-watermark

datapythonv0.4.4

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

WaterMark

✓ from blind_watermark import WaterMark

✗ from blind_watermark import blind_watermark

Main class is WaterMark, not the package name

embed_watermark

✓ from blind_watermark import WaterMark bwm = WaterMark() bwm.read_img('original.png') bwm.read_wm('watermark.png') bwm.embed('output.png')

✗ from blind_watermark import embed_watermark

No standalone function; use WaterMark instance methods

Embed a watermark image into a host image, then extract it.

from blind_watermark import WaterMark bwm = WaterMark() bwm.read_img('original.png') bwm.read_wm('watermark.png') bwm.embed('output.png') bwm2 = WaterMark() wm_extract = bwm2.extract('output.png', 'extracted_watermark.png') print('Watermark extracted successfully')

Debug

Known issues

gotchaThe library modifies the image in-place during embed; do not reuse the WaterMark object after embedding without re-reading images.

fix

Create a new WaterMark() instance for each embed/extract operation.

affects: >=0.2.0

deprecatedMethod 'embed' returns None, not the watermarked image array. Use 'embed' to save to file; later versions may add return value.

fix

Use embed with a file path; if you need array, use embed(..., output_file_name=None) (check docs).

affects: 0.x

gotcharead_wm expects a file path or a watermark image path; if the watermark image is too large relative to host, embedding may fail silently.

fix

Ensure watermark dimensions are smaller than host; typical max ratio 1/4.

affects: >=0.2.0

Errors

Common errors & fixes

ModuleNotFoundError: No module named 'blind_watermark'

Package name is blind-watermark, but import is blind_watermark.

fix

pip install blind-watermark and import as from blind_watermark import WaterMark

AttributeError: 'WaterMark' object has no attribute 'read_img'

Using outdated version <0.2.0 which had different API (e.g., bwm = BlindWatermark()).

fix

Upgrade to latest: pip install --upgrade blind-watermark

Upgrade

Version history

0.4.4latest on PyPI · released Apr 8, 2023

Audit

Dependencies

numpyrequiredArray operations

opencv-pythonrequiredImage I/O and processing

pywtrequiredDWT wavelet transform

matplotliboptionalVisualization in examples

Agent activity

30 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/guofei9987/blind_watermark ↗

packagehttps://pypi.org/project/blind-watermark/ ↗