error while converting the byte array to image ,after modifying the byte array and the byte array is taken from the image itself in c#

Question

this is my code. Here i hv formed the byte array of img, i am trying to add some vlue to this byte array say 10 and i'll take care that the value is not exceeding 255. later if i try to redraw the image via the following code i am getting error at this line... what can be the problem.. without modification if i try to draw the image it is coming but if i cahnge some value it is not drawing..

public Image btoi(byte[] bt)
{
    ms = new MemoryStream(bt, 0, bt.Length);
    img = Image.FromStream (ms, true); // error at this line
    ms.Close();

    return img;
}

If you have an byte arrary why do you want to add some extra bytes to it?? and what error are you getting? — Vinay Pandey
– Vinay Pandey, Commented May 10, 2010 at 6:41

Anders Abel · Accepted Answer · 2010-05-10 06:40:59Z

1

The image data can be stored in various formats, including a header wich describes the image data. If you want to change the RGB value of the pixels you have to first make sure that the image format you are using are indeed storing data in RGB format and second only manipulate those parts of the memory block that contains the RGB values.

If you alter the entire memory block you will probably overwrite the values indicating image width and height as well.

answered May 10, 2010 at 6:40

Anders Abel

69.6k18 gold badges154 silver badges221 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

error while converting the byte array to image ,after modifying the byte array and the byte array is taken from the image itself in c#

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related