how is this image stored in memory?

[Stephen.Schoenberger@gmail.com]

I am using the following code to get a monochrome bitmap image into a
byte[] form

Rectangle rec = new Rectangle(0, 0, bmpSource.Width ,
bmpSource.Heigh t);
BitmapData bmpSData = bmpSource.LockB its(rec,
ImageLockMode.R eadWrite, bmpSource.Pixel Format);

// Get the address of the first line.
IntPtr iptr = bmpSData.Scan0;

// Declare an array to hold the bytes of the bitmap.
int ibytes = bmpSource.Width * bmpSource.Heigh t;
byte[] bValues = new byte[ibytes];

// Copy the values into the array.
Marshal.Copy(ip tr, bValues, 0, ibytes); //just use this!

how is the information stored? Meaning if I "read" bValues from 0 to
(bmp.Width) would that get me the first line in bmpSource? And what
would be the most effective way to save this bValues back to a Bitmap?

Thanks

[Fredo]

Re: how is this image stored in memory?

Did you search Google by chance?

Try this: http://www.codersource.net/csharp_image_Processing.aspx to get you
started. It gives you everything you need to know about how to get at the
pixels in BitmapData.


<Stephen.Schoen berger@gmail.co mwrote in message
news:f74cccb8-48b5-4197-9ad5-f6f84146e66e@q2 1g2000hsa.googl egroups.com...

>I am using the following code to get a monochrome bitmap image into a
byte[] form
>
Rectangle rec = new Rectangle(0, 0, bmpSource.Width ,
bmpSource.Heigh t);
BitmapData bmpSData = bmpSource.LockB its(rec,
ImageLockMode.R eadWrite, bmpSource.Pixel Format);
>
// Get the address of the first line.
IntPtr iptr = bmpSData.Scan0;
>
// Declare an array to hold the bytes of the bitmap.
int ibytes = bmpSource.Width * bmpSource.Heigh t;
byte[] bValues = new byte[ibytes];
>
// Copy the values into the array.
Marshal.Copy(ip tr, bValues, 0, ibytes); //just use this!
>
how is the information stored? Meaning if I "read" bValues from 0 to
(bmp.Width) would that get me the first line in bmpSource? And what
would be the most effective way to save this bValues back to a Bitmap?
>
Thanks

[Ben Voigt [C++ MVP]]

Re: how is this image stored in memory?

Stephen.Schoenb erger@gmail.com wrote:

I am using the following code to get a monochrome bitmap image into a
byte[] form
>
Rectangle rec = new Rectangle(0, 0, bmpSource.Width ,
bmpSource.Heigh t);
BitmapData bmpSData = bmpSource.LockB its(rec,
ImageLockMode.R eadWrite, bmpSource.Pixel Format);

Well, you asked to get the same format as the source, so to answer your
question "it depends".

If you want a fixed format, specify a particular PixelFormat, such as
PixelFormat.Pix elFormat1bppInd exed or PixelFormat.Pix elFormat32bppRG B

>
// Get the address of the first line.
IntPtr iptr = bmpSData.Scan0;
>
// Declare an array to hold the bytes of the bitmap.
int ibytes = bmpSource.Width * bmpSource.Heigh t;
byte[] bValues = new byte[ibytes];
>
// Copy the values into the array.
Marshal.Copy(ip tr, bValues, 0, ibytes); //just use this!
>
how is the information stored? Meaning if I "read" bValues from 0 to
(bmp.Width) would that get me the first line in bmpSource? And what
would be the most effective way to save this bValues back to a Bitmap?
>
Thanks

[illusion.admins@gmail.com]

Re: how is this image stored in memory?

On Feb 13, 7:08 pm, "Ben Voigt [C++ MVP]" <r...@nospam.no spamwrote:

Stephen.Schoenb er...@gmail.com wrote:

I am using the following code to get a monochrome bitmap image into a
byte[] form

>

Rectangle rec = new Rectangle(0, 0, bmpSource.Width ,
bmpSource.Heigh t);
BitmapData bmpSData = bmpSource.LockB its(rec,
ImageLockMode.R eadWrite, bmpSource.Pixel Format);

>
Well, you asked to get the same format as the source, so to answer your
question "it depends".
>
If you want a fixed format, specify a particular PixelFormat, such as
PixelFormat.Pix elFormat1bppInd exed or PixelFormat.Pix elFormat32bppRG B
>
>
>

// Get the address of the first line.
IntPtr iptr = bmpSData.Scan0;

>

// Declare an array to hold the bytes of the bitmap.
int ibytes = bmpSource.Width * bmpSource.Heigh t;
byte[] bValues = new byte[ibytes];

>

// Copy the values into the array.
Marshal.Copy(ip tr, bValues, 0, ibytes); //just use this!

>

how is the information stored? Meaning if I "read" bValues from 0 to
(bmp.Width) would that get me the first line in bmpSource? And what
would be the most effective way to save this bValues back to a Bitmap?

>

Thanks

How can I go about taking the array of bytes I have and "converting "
it back to a Bitmap?

[Ben Voigt [C++ MVP]]

Re: how is this image stored in memory?

How can I go about taking the array of bytes I have and "converting "

it back to a Bitmap?

Use the following Bitmap constructor:

public Bitmap (
int width,
int height,
int stride,
PixelFormat format,
IntPtr scan0
)

[illusion.admins@gmail.com]

Re: how is this image stored in memory?

On Feb 14, 11:56 am, "Ben Voigt [C++ MVP]" <r...@nospam.no spamwrote:

How can I go about taking the array of bytes I have and "converting "
it back to a Bitmap?

>
Use the following Bitmap constructor:
>
public Bitmap (
int width,
int height,
int stride,
PixelFormat format,
IntPtr scan0
)

Is there a way to convert the bitmap that is in a byte[] array format
back to a bitmap?

[Ben Voigt [C++ MVP]]

Re: how is this image stored in memory?

illusion.admins @gmail.com wrote:

On Feb 14, 11:56 am, "Ben Voigt [C++ MVP]" <r...@nospam.no spamwrote:

>>How can I go about taking the array of bytes I have and "converting "
>>it back to a Bitmap?

>>
>Use the following Bitmap constructor:
>>
>public Bitmap (
> int width,
> int height,
> int stride,
> PixelFormat format,
> IntPtr scan0
>)

>
Is there a way to convert the bitmap that is in a byte[] array format
back to a bitmap?

Did you read the post you replied to?