working with images as byte[] arrays

[Stephen.Schoenberger]

I am working with some images as byte[] arrays and am not sure nor can
I figure out if as I am reading the image and saving smaller sub-
images I am reading across and down the image or down and back up or
randomly? I need to know so in turn I can realize what the coordinates
are of the sub-images. Here is a snippet of the code that is
performing this task...

for (int a = 1; a < 4800; a++) //will create 4800 sub images if a
goes to numsubimages
{
Bitmap tempbitmap;
//this declares the size of tbyte to be 768 which is
the number of bytes needed for 16x16 sub image
byte[] tbyte = new byte[(stride * height) / ((height /
16) * (width / 16))];
byte[] holding2 = new byte[tbyte.Length];

for (int b = 1; b < tbyte.Length; b++)
{
tbyte.Initializ e();
byte holding = (byte) bytebitmap.GetV alue(b*a);
tbyte.SetValue( holding, b);

}
tempbitmap = BytesToBmp(tbyt e, tempSize); //save the
output of the 16x16 sub image so results can be seen
}

BytesToBmp is simply a function that coverts a byte array into a
bitmap image.

Thanks!

[zacks]

On Feb 7, 1:14*pm, Stephen.Schoenb [e-mail] wrote:

I am working with some images as byte[] arrays and am not sure nor can
I figure out if as I am reading the image and saving smaller sub-
images I am reading across and down the image or down and back up or
randomly? I need to know so in turn I can realize what the coordinates
are of the sub-images. Here is a snippet of the code that is
performing this task...

*for (int a = 1; a < 4800; a++) //will create 4800 sub images if a
goes to numsubimages
{
* * * * * * * * Bitmap tempbitmap;
* * * * * * * * //this declares the size of tbyte to be 768 which is
the number of bytes needed for 16x16 sub image
* * * * * * * * byte[] tbyte = new byte[(stride * height) / ((height /
16) * (width / 16))];
* * * * * * * * byte[] holding2 = new byte[tbyte.Length];

* * * * * * * * for (int b = 1; b < tbyte.Length; b++)
* * * * * * * * {
* * * * * * * * * * tbyte.Initializ e();
* * * * * * * * * * byte holding = (byte) bytebitmap..Get Value(b*a);
* * * * * * * * * * tbyte.SetValue( holding, b);

* * * * * * * * }
* * * * * * * * tempbitmap = BytesToBmp(tbyt e, tempSize); //save the
output of the 16x16 sub image so results can be seen

}

BytesToBmp is simply a function that coverts a byte array into a
bitmap image.

Thanks!

What is the input file type? I don't think this method would work for
a compressed image file like JPG.