How to covert RAW data into JPEG file ?

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Hello,
I am using a library which returns a byte[] containing RAW data, ie all
pixels; color values coded in a byte array without header. I would like to
save those data into a JPEG file.
How to convert this raw data into jpeg file through c# code.

Thanks & Regards
Shweta

Posted 14-Jun-14 8:53am

ShwetaSaxena

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[no name] 14-Jun-14 15:01pm

http://www.google.com/search?q=How+to+convert+RAW+file+into+JPEG+file+c%23

ShwetaSaxena 14-Jun-14 15:33pm

I googled it several times but unable to get the correct answer.. Kindly help.

[no name] 14-Jun-14 15:49pm

Help with what exactly? You have not asked any kind of a question, nor have you described any kind of a problem. What effort have you made? Where is the code that you have written that demonstrates a problem? Any kind of a problem? What were those problems? I find it very hard to believe that you went through 90000+ pages and found nothing at all that helped you even the least bit.

ShwetaSaxena 19-Jun-14 13:45pm

I wrote this code to save the image in .raw format...

// Save to Raw
string strFileName = ConvertStringAnsi(DeviceInfo.pcDeviceName, 260);
strFileName += ".raw";
FileStream vFileStream = new FileStream(strFileName, FileMode.Create);
BinaryWriter vBinaryWriter = new BinaryWriter(vFileStream);
for (int vIndex = 0; vIndex < nFileSize; vIndex++)
{
vBinaryWriter.Write((byte)pImageFile[vIndex]);
}
vBinaryWriter.Close();
vFileStream.Close();
// Save to Raw

ShwetaSaxena 19-Jun-14 13:46pm

and it works fine. But now i am having problem in saving it in .jpg format

Bernhard Hiller 16-Jun-14 2:56am

Where do those "raw" data come from? Froma specific digital photo camera? Then the format is likely specific for that device, and you'll have to get an SDK from the manufacturer...

ShwetaSaxena 19-Jun-14 13:43pm

I am getting those raw format images from a sensor. Yes, I have the SDK from the manufacturer. I am able to get the image. But it is in RAW format. I have to save it in jpeg or png format. Thank u

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future2015 · Answer 1 · 2014-06-14T17:27:00

Solution 1

One idea
Raw bytes -> Stream -> Bitmap -> Save to JPEG file

C#

MemoryStream stream = new MemoryStream();
stream.Write(rawdata);
Bitmap bm = new Bitmap(stream);
bm.Save("C:\example.jpg", System.Drawing.Imaging.ImageFormat.JPEG);

Posted 14-Jun-14 17:27pm

future2015

Comments

ShwetaSaxena 19-Jun-14 13:41pm

It is generating an error

No overload for method 'Write' takes 1 arguments

ShwetaSaxena 19-Jun-14 13:53pm

I write stream.Write(pImageFile, 0, nFileSize);
instead of stream.Write(rawdata);

Now Bitmap bm = new Bitmap(stream); is giving an Exception that 'Parameter is not valid'

Bernhard Hiller · Answer 2 · 2014-06-19T20:18:00

Solution 2

There is no such thing as a common raw format! All those "raw formats" are vendor-specific. You have to use the SDK of that vendor. There you ought to find methods for handling the image.

Posted 19-Jun-14 20:18pm

Bernhard Hiller

Pikoh · Answer 3 · 2014-06-19T21:49:00

Solution 3

I think you can't do it without an external library,as Solution 2 indicates. But have a look at this,maybe could help imagemagick

Posted 19-Jun-14 21:49pm

Pikoh