物流网站建设公司2023新闻大事件摘抄

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一、关于 blind-watermark

Blind watermark 基于 DWT-DCT-SVD.

• github : https://github.com/guofei9987/blind_watermark
• Documentation: https://blindwatermark.github.io/blind_watermark/#/en/
• 文档： https://blindwatermark.github.io/blind_watermark/#/zh/
• Source code: https://github.com/guofei9987/blind_watermark
• Discussions : https://github.com/guofei9987/blind_watermark/discussions

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安装

pip install blind-watermark

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源码安装当前开发版本

git clone git@github.com:guofei9987/blind_watermark.git
cd blind_watermark
pip install .

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二、bash 中使用

# 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

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三、Python 调用

1、基本使用

Original Image + Watermark = Watermarked Image

+ ‘@guofei9987 开源万岁！’ =

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See the codes

嵌入水印：

from blind_watermark import WaterMarkbwm1 = 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))

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提取水印：

bwm1 = WaterMark(password_img=1, password_wm=1)
wm_extract = bwm1.extract('output/embedded.png', wm_shape=len_wm, mode='str')
print(wm_extract)

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输出：

@guofei9987 开源万岁！

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2、attacks on Watermarked Image

attack method	image after attack	extracted watermark
Rotate 45 Degrees		‘@guofei9987 开源万岁！’
Random crop		‘@guofei9987 开源万岁！’
Masks		‘@guofei9987 开源万岁！’
Vertical cut		‘@guofei9987 开源万岁！’
Horizontal cut		‘@guofei9987 开源万岁！’
Resize		‘@guofei9987 开源万岁！’
Pepper Noise		‘@guofei9987 开源万岁！’
Brightness 10% Down		‘@guofei9987 开源万岁！’

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3、embed images

嵌入水印：

from blind_watermark import WaterMarkbwm1 = 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')

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提取水印：

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', )

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attack method	image after attack	extracted watermark
Rotate 45 Degrees	[
Random crop
Mask

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4、embed array of bits

See it here

作为 demo，我们嵌入 6 bytes 数据：

wm = [True, False, True, True, True, False]

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嵌入：

from blind_watermark import WaterMarkbwm1 = 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')

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提取：

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)

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请注意，wm_shape（水印的形状）是必需的

输出 wm_extract 是一个浮点数组。设置阈值，例如0.5。

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四、并发

WaterMark(..., processes=None)

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• processes 进程数可以是整数。默认为 None，这意味着使用所有进程。

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五、相关 Project

• text_blind_watermark (将消息嵌入文本): https://github.com/guofei9987/text_blind_watermark
• HideInfo（隐藏为图像、隐藏为声音、隐藏为文本）：https://github.com/guofei9987/HideInfo

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