我的静态方法比较了两个jpeg文件,我得到Memory Out of Range
异常。
我能够使用探查器确定我的代码的哪一部分消耗的内存最多,但是,我无法释放内存,即使我尝试了GC.Collect()
public static bool IsDuplicate(string newFile, string pathDestination)
{
string[] destinationFiles = Directory.GetFiles(pathDestination); // 1100 jpeg files.
foreach (var file in destinationFiles)
{
if (CompareImageFiles(newFile, file))
return true;
}
return false;
}
//1100 jpeg files (pathFile2) being compared with one jpeg file (pathFile1)
public static bool CompareImageFiles(string pathFile1, string pathFile2)
{
// Memory consumption around 1 GB by ms
MemoryStream ms = new MemoryStream();
// Memory consumption around 2.7 GB by img1
System.Drawing.Image img1 = System.Drawing.Image.FromFile(pathFile1);
// Memory consumption around 3 GB by img2
System.Drawing.Image img2 = System.Drawing.Image.FromFile(pathFile2);
if (!(img1.Height == img2.Height && img1.Width == img2.Width))
{
return false; // Dimensions mismatch
}
else
{
img1.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
string image1 = Convert.ToBase64String(ms.ToArray());
img2.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
string image2 = Convert.ToBase64String(ms.ToArray());
if (image1.Equals(image2))
{
// This didn't work
//ms = null; img1 = null; img2 = null; image1 = null; image2 = null;
return true;
}
else
{
// This didn't work
//ms = null; img1 = null; img2 = null; image1 = null; image2 = null;
return false;
}
}
}
一点背景:是的,我确实理解这不是比较图像文件的完美方法(我第一次尝试处理图像文件)。我已经启动了此任务的新优化版本(正在进行中)。
然而,由于这个解决方案在过去几个月开始工作,并且最近开始破坏。所以,在我归档这种方法之前,至少我想解决这个问题,这给了我很好的学习。
答案 0 :(得分:4)
您应该处理Image
个实例和内存流,方法是将它们放在using
语句中,或者在完成后再手动调用Dispose()
:
public static bool CompareImageFiles(string pathFile1, string pathFile2)
{
using (var ms = new MemoryStream())
using (var img1 = System.Drawing.Image.FromFile(pathFile1))
using (var img2 = System.Drawing.Image.FromFile(pathFile2))
{
// Rest of your code...
}
}