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From raw data (byte[]) to Bitmap and vice versa?

I have 2 questions that are just the opposite to one another:

(1) I need to read an image file (like bitmap, jpeg etc.) and to save only
its data, I need to save his data in a raw data format, meaning; I don't want
to save the image header, only the pixels data.
the raw data should be saved in a byte array.
The direct way is to do a loop over the image pixels and to copy pixel by
pixel to the byte array.
I'm looking for another way to do that. Is there a .NET function/method that
does it?

The following code is not good because it saves also the bitmap header to
the byte array:
Bitmap img = Bitmap.FromFile (@"C:\WINDOWS\B lue Lace 16.bmp", true) as Bitmap;
MemoryStream ms = new MemoryStream();
img.Save(ms, img.RawFormat);
byte[] rawData = ms.ToArray();

(1) I have a raw data image in a byte array, and I need to build a bitmap
from it.
The raw data does not contain the image format (width and height), but I do
have it in other variables (int width; int height).

How do I do that?

--
Thanks
Sharon
Nov 17 '05 #1
1 10589
Sharon,

Take a look at the Bitmap.LockBits () method, may be what you need.

Regards - Octavio

"Sharon" <Sh****@discuss ions.microsoft. com> escribió en el mensaje
news:6E******** *************** ***********@mic rosoft.com...
I have 2 questions that are just the opposite to one another:

(1) I need to read an image file (like bitmap, jpeg etc.) and to save only
its data, I need to save his data in a raw data format, meaning; I don't
want
to save the image header, only the pixels data.
the raw data should be saved in a byte array.
The direct way is to do a loop over the image pixels and to copy pixel by
pixel to the byte array.
I'm looking for another way to do that. Is there a .NET function/method
that
does it?

The following code is not good because it saves also the bitmap header to
the byte array:
Bitmap img = Bitmap.FromFile (@"C:\WINDOWS\B lue Lace 16.bmp", true) as
Bitmap;
MemoryStream ms = new MemoryStream();
img.Save(ms, img.RawFormat);
byte[] rawData = ms.ToArray();

(1) I have a raw data image in a byte array, and I need to build a bitmap
from it.
The raw data does not contain the image format (width and height), but I
do
have it in other variables (int width; int height).

How do I do that?

--
Thanks
Sharon

Nov 17 '05 #2

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