private static void Process(int width, int height, MagickImage image, int?quality) { image.Strip(); if (quality.HasValue) { image.Quality = quality.Value; } //模版的宽高比例 var templateRate = (double)width / height; //原图片的宽高比例 var nowRate = (double)image.Width / image.Height; if (templateRate < nowRate) { //以高为准缩放 // Resize each image in the collection to a width of 200. When zero is specified for the height // the height will be calculated with the aspect ratio. image.Resize(0, height); image.ChopHorizontal(width, image.Width - width); } else { //以宽为准缩放 image.Resize(width, 0); image.ChopVertical(height, image.Height - height); } }