Install
openclaw skills install image-watermark图片批量加水印。输入图片文件+水印文字,自动在图片上添加水印并返回处理后的图片。 触发词:加水印、图片水印、批量水印。
openclaw skills install image-watermark用户发送图片并要求加水印时触发。
| 输入项 | 必需 | 说明 |
|---|---|---|
| 图片文件 | ✅ | 1张或多张图片(PNG/JPG) |
| 水印文字 | ✅ | 要添加的水印内容 |
| 水印位置 | 可选 | 居中/右下角/平铺(默认:平铺) |
| 透明度 | 可选 | 0-100%(默认:30%) |
| 字体大小 | 可选 | 自动/小/中/大(默认:自动根据图片尺寸) |
# 使用 Pillow 库
from PIL import Image, ImageDraw, ImageFont
import math
def add_watermark(input_path, output_path, text, opacity=0.3, mode='tile'):
"""
mode: 'tile'(平铺) / 'center'(居中) / 'corner'(右下角)
"""
img = Image.open(input_path).convert('RGBA')
txt_layer = Image.new('RGBA', img.size, (255,255,255,0))
draw = ImageDraw.Draw(txt_layer)
# 自动计算字体大小(图片宽度的5%)
font_size = max(int(img.width * 0.05), 20)
try:
font = ImageFont.truetype('/usr/share/fonts/truetype/wqy/wqy-zenhei.ttc', font_size)
except:
font = ImageFont.load_default()
alpha = int(255 * opacity)
if mode == 'tile':
# 平铺模式:45度角重复
bbox = draw.textbbox((0,0), text, font=font)
tw, th = bbox[2]-bbox[0], bbox[3]-bbox[1]
for y in range(-img.height, img.height*2, int(th*3)):
for x in range(-img.width, img.width*2, int(tw*2)):
draw.text((x, y), text, fill=(128,128,128,alpha), font=font)
txt_layer = txt_layer.rotate(45, expand=False, center=(img.width//2, img.height//2))
elif mode == 'center':
bbox = draw.textbbox((0,0), text, font=font)
tw, th = bbox[2]-bbox[0], bbox[3]-bbox[1]
x = (img.width - tw) // 2
y = (img.height - th) // 2
draw.text((x, y), text, fill=(128,128,128,alpha), font=font)
elif mode == 'corner':
bbox = draw.textbbox((0,0), text, font=font)
tw, th = bbox[2]-bbox[0], bbox[3]-bbox[1]
x = img.width - tw - 20
y = img.height - th - 20
draw.text((x, y), text, fill=(128,128,128,alpha), font=font)
result = Image.alpha_composite(img, txt_layer)
result = result.convert('RGB')
result.save(output_path, quality=95)
Pillow (pip3 install Pillow)wqy-zenhei(apt install fonts-wqy-zenhei)