图像水印 [英] Image watermark

问题描述

是否可以通过C#使用Azure函数(较少服务器)对图像加水印?据我所知，Azure函数不支持System.Drawing库，因此我无法使用Graphic和Brushes类使用C#对图像进行水印处理.

Is there any way to watermark an image using Azure function (server less) with C#? As I got to know the System.Drawing library is unsupported by Azure function so I am unable to use Graphic and Brushes classes to watermark an image using C#.

推荐答案

您可以使用其他库，例如 Magick.NET .

我尝试了一个使用ImageSharp的简单功能，将图像转换为可以按预期工作的灰度.

I have tried a simple function using ImageSharp to convert images to greyscale which worked as expected.

using System.IO;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Host;
using Microsoft.Extensions.Logging;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;
using SixLabors.ImageSharp.Processing;

namespace funk_csharp
{
  public static class ConvertToGrayscale
  {
    [FunctionName("ConvertToGrayscale")]
    public static void Run(
      [BlobTrigger("sample-images/{name}")] Stream image,
      [Blob("sample-images-gray/{name}", FileAccess.Write)] Stream imageGrey,
      string name,
      ILogger log
    )
    {
      Image<Rgba32> img = Image.Load(image);
      img.Mutate(ctx => ctx.Grayscale());
      img.SaveAsPng(imageGrey);
    }
  }
}

此处是用于水印的ImageSharp示例.

Here is a ImageSharp sample for watermarking.

这篇关于图像水印的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！