README.md · godxkey/blind_watermark

# blind-watermark

Blind watermark based on DWT-DCT-SVD.

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- **Documentation:** [https://BlindWatermark.github.io/blind_watermark/#/en/](https://BlindWatermark.github.io/blind_watermark/#/en/)
- **文档：** [https://BlindWatermark.github.io/blind_watermark/#/zh/](https://BlindWatermark.github.io/blind_watermark/#/zh/)  
- **中文 readme** [README_cn.md](README_cn.md)
- **Source code:** [https://github.com/guofei9987/blind_watermark](https://github.com/guofei9987/blind_watermark)

# install
```bash
pip install blind-watermark
```

For the current developer version:
```bach
git clone git@github.com:guofei9987/blind_watermark.git
cd blind_watermark
pip install .
```

# How to use

## Use in bash

```bash
# embed watermark into image:
blind_watermark --embed --pwd 1234 examples/pic/ori_img.jpeg "watermark text" examples/output/embedded.png
# extract watermark from image:
blind_watermark --extract --pwd 1234 --wm_shape 111 examples/output/embedded.png
```

## Use in Python

Original Image + Watermark = Watermarked Image

![origin_image](docs/原图.jpeg) + '@guofei9987 开源万岁！' = ![打上水印的图](docs/打上水印的图.jpg)

See the [codes](/examples/example_str.py)

Embed watermark:
```python
from blind_watermark import WaterMark

bwm1 = WaterMark(password_img=1, password_wm=1)
bwm1.read_img('pic/ori_img.jpg')
wm = '@guofei9987 开源万岁！'
bwm1.read_wm(wm, mode='str')
bwm1.embed('output/embedded.png')
len_wm = len(bwm1.wm_bit)
print('Put down the length of wm_bit {len_wm}'.format(len_wm=len_wm))
```

Extract watermark:
```python
bwm1 = WaterMark(password_img=1, password_wm=1)
wm_extract = bwm1.extract('output/embedded.png', wm_shape=len_wm, mode='str')
print(wm_extract)
```
Output:
>@guofei9987 开源万岁！

### attacks on Watermarked Image

### embed images

embed watermark:
```python
from blind_watermark import WaterMark

bwm1 = WaterMark(password_wm=1, password_img=1)
# read original image
bwm1.read_img('pic/ori_img.jpg')
# read watermark
bwm1.read_wm('pic/watermark.png')
# embed
bwm1.embed('output/embedded.png')
```

Extract watermark:
```python
bwm1 = WaterMark(password_wm=1, password_img=1)
# notice that wm_shape is necessary
bwm1.extract(filename='output/embedded.png', wm_shape=(128, 128), out_wm_name='output/extracted.png', )
```

### embed array of bits

See it [here](/examples/example_bit.py)

As demo, we embed 6 bytes data:
```python
wm = [True, False, True, True, True, False]
```

Embed:
```python
from blind_watermark import WaterMark

bwm1 = WaterMark(password_img=1, password_wm=1)
bwm1.read_ori_img('pic/ori_img.jpg')
bwm1.read_wm([True, False, True, True, True, False], mode='bit')
bwm1.embed('output/embedded.png')
```

Extract:
```python
bwm1 = WaterMark(password_img=1, password_wm=1, wm_shape=6)
wm_extract = bwm1.extract('output/打上水印的图.png', mode='bit')
print(wm_extract)
```
Notice that `wm_shape` (shape of watermark) is necessary

The output `wm_extract` is an array of float. set a threshold such as 0.5.

# Concurrency

```python
WaterMark(..., processes=None)
```
- `processes` number of processes, can be integer. Default `None`, which means using all processes.

## Related Project

text_blind_watermark: [https://github.com/guofei9987/text_blind_watermark](https://github.com/guofei9987/text_blind_watermark)  
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godxkey/blind_watermark

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