[英]c# hex string to byte image and filtering
I need some help in converting a hex string into an image 我需要一些帮助将十六进制字符串转换为图像
doing some researches i came up to this code: 做一些研究,我想到了这段代码:
private byte[] HexString2Bytes(string hexString)
{
int bytesCount = (hexString.Length) / 2;
byte[] bytes = new byte[bytesCount];
for (int x = 0; x < bytesCount; ++x)
{
bytes[x] = Convert.ToByte(hexString.Substring(x*2, 2),16);
}
return bytes;
}
public bool ByteArrayToFile(string _FileName, byte[] _ByteArray)
{
try
{
System.IO.FileStream _FileStream = new System.IO.FileStream(_FileName, System.IO.FileMode.Create, System.IO.FileAccess.Write);
_FileStream.Write(_ByteArray, 0, _ByteArray.Length);
_FileStream.Close();
return true;
}
catch (Exception _Exception)
{
MessageBox.Show(_Exception.Message);
}
return false;
}
The problem is that the resulting image is almost all black and i guess i need to apply some filters to better translate the gray-scale (since the original image is in gray-scale only) 问题在于生成的图像几乎全是黑色,我想我需要应用一些滤镜以更好地转换灰度(因为原始图像仅是灰度的)
Can anyone help me? 谁能帮我?
Many thanks 非常感谢
You don't need to apply any filters. 您不需要应用任何过滤器。 I guess that the hexString
variable that you are passing as input is simply a black image. 我猜您作为输入传递的hexString
变量只是一个黑色图像。 The following works great for me: 以下对我有用:
class Program
{
static void Main()
{
byte[] image = File.ReadAllBytes(@"c:\work\someimage.png");
string hex = Bytes2HexString(image);
image = HexString2Bytes(hex);
File.WriteAllBytes("visio.png", image);
Process.Start("visio.png");
}
private static byte[] HexString2Bytes(string hexString)
{
int bytesCount = (hexString.Length) / 2;
byte[] bytes = new byte[bytesCount];
for (int x = 0; x < bytesCount; ++x)
{
bytes[x] = Convert.ToByte(hexString.Substring(x * 2, 2), 16);
}
return bytes;
}
private static string Bytes2HexString(byte[] buffer)
{
var hex = new StringBuilder(buffer.Length * 2);
foreach (byte b in buffer)
{
hex.AppendFormat("{0:x2}", b);
}
return hex.ToString();
}
}
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