使用 Cloudflare Worker 处理图片，支持缩放、剪裁、水印等功能

Cloudflare 官方也有图片处理，但是需要绑卡和付费套餐。

Photon 除了 缩放、剪裁、水印等基础功能，还支持滤镜、图像校正等功能。

可以使用这两个工具探索：

https://silvia-odwyer.github.io/photon/demo.html

https://image-demo.denoflare.dev/

官方文档：

96 functions are available, including:

• Transformations: Resize, crop, and flip images.
• Image correction: Hue rotation, sharpening, brightness adjustment, adjusting saturation, lightening/darkening all within various colour spaces.
• Convolutions: Sobel filters, blurs, Laplace effects, edge detection, etc.,
• Channel manipulation: Increasing/decreasing RGB channel values, swapping channels, removing channels, etc.
• Monochrome effects: Duotoning, greyscaling of various forms, thresholding, sepia, averaging RGB values
• Colour manipulation: Work with the image in various colour spaces such as HSL, LCh, and sRGB, and adjust the colours accordingly.
• Filters: Over 30 pre-set filters available, incorporating various effects and transformations.
• Text: Apply text to imagery in artistic ways, or to watermark, etc.,
• Watermarking: Watermark images in multiple formats.
• Blending: Blend images together using 10 different techniques, change image backgrounds.

目前在 Worker 里边能支撑多少我没有测试（免费 Worker 有内存和CPU运行时间限制），参数都是透穿的，大家可以按照修改参数测试， 参数说明。

比如滤镜：