我正在使用FormsConnect应用程序为iPad导出签名到XML。 应用程序的输出如下:
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现在我正在尝试使用以下代码将此Hex字符串转换回图像:
Bitmap newImage = new Bitmap(new MemoryStream(StringToByteArray(hex)));
public static byte[] StringToByteArray(string hex)
{
hex = hex.Substring(2, hex.Length - 2);
if (hex.Length % 2 != 0)
{
throw new ArgumentException(String.Format(CultureInfo.InvariantCulture, "The binary key cannot have an odd number of digits: {0}", hex));
}
byte[] HexAsBytes = new byte[hex.Length / 2];
for (int index = 0; index < HexAsBytes.Length; index++)
{
string byteValue = hex.Substring(index * 2, 2);
HexAsBytes[index] = byte.Parse(byteValue, NumberStyles.HexNumber, CultureInfo.InvariantCulture);
}
return HexAsBytes;
}
但是当我尝试将流加载到位图时,我一直得到参数无效。我向App的开发人员提出了问题,这是他的回答:
亲爱的亚历克斯数据以二进制,十六进制格式存储。以下是有关如何读取二进制数据并将其作为jpg写回来的说明。
byteData [i] =(digit [i * 2] shl 4)+(digit [i * 2 + 1])
以上假设数字已经转换为0到15之间的数字。如果您试图通过以更大的块(例如整数)写入内存来优化脚本,则需要考虑字节序。所有主要的CPU架构都是little-endian,这意味着数字的存储位置与它们的实际值的顺序相反(即0x1234在内存中存储为0x3412)。
以下是两个用于从表单中提取blob数据的不同脚本:
1. Python Script:
iterate over each photo attached to image field in FormConnect xml file
data = R[i]
to strip '0x' off front of each blob
a = data[2:]
iterate over each byte, write as binary int to array
for i in range(len(a)/2):
b = (int(bin(int(a[i*2],16)),2)<<4) + int(bin(int(a[i*2+1],16)),2)
data.append(b)
write array to binary file
F = file(outFile,'wb')
data.tofile(F)
F.close()
PHP Script:
$pic = "";
$field = substr($field,2);
header("Content-Type: image/jpeg");
$pic = pack("H*", $field);
echo $pic;
如果有人能帮助我,我将非常感激。 亲切的问候, 亚历
答案 0 :(得分:3)
您的问题不是十六进制转换例程,而是原始数据未正确编码。基于其中的所有零,我会说它只是一个原始位图!我的猜测是,生成该数据的程序的作者在输出之前忘记将位图编码为特定的文件格式。