我试图压缩图片但没有成功。
看看我的小实验
var results = new Dictionary<int, int>();
for (int i = 0; i <= 100; i++)
{
var stream = new MemoryStream();
image.Quality = i;
image.CompressionMethod = CompressionMethod.Zip;
image.Write(stream, MagickFormat.Png);
results[i] = stream.GetBuffer().Length;
stream.Flush();
}
var best = results.OrderBy(e => e.Value).First();
// the same length as for original image. quality doesn't work in this example - dictionary values are identical
有人能指出我正确的方向吗?
我已在此处阅读了一些详细信息ImageMagick: Lossless max compression for PNG?
答案 0 :(得分:4)
您似乎正在使用Magick.NET。该库有一个名为ImageOptimizer的类,可用于无损压缩文件。有关如何使用它的示例,请访问:https://github.com/dlemstra/Magick.NET/blob/master/Documentation/LosslessCompression.md。
FileInfo snakewareLogo = new FileInfo(@"c:\Snakeware.png");
Console.WriteLine("Bytes before: " + snakewareLogo.Length);
ImageOptimizer optimizer = new ImageOptimizer();
optimizer.LosslessCompress(snakewareLogo);
snakewareLogo.Refresh();
Console.WriteLine("Bytes after: " + snakewareLogo.Length);
您的文件仍有可能无法缩小,因为它已经以最佳压缩方式存储。