You don't really 'compress' when you save as a jpeg. You are throwing out alot of data. There is no way to uncompress a jpeg image. You can save it as a bitmap and its size will increase dramatically, but it will still have all the artifacts from the jpeg. If you want to 'compress' an image and keep the original quality, save it as a PNG or something. My current favourite word is: Nipple! -SK Genius Game Programming articles start -here[^]-

Iterate the collection and write each element to a StreamWriter. All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia How to use google | Ask smart questions

gigahertz205 wrote: I know that the Graphics class cannot take indexed images Are you sure? Indexed to RGB shouldn't cause any visible change. RGB to indexed may cause a change, since a best-fit color table needs to be created. Mark Salsbery Microsoft MVP - Visual C++ :java:

What I would do is firstly save the traversal. Pre / Post. And then the data. .Net makes IO easy. Try the StreamWriter and StreamReader classes Stephen Lintott Bsc IT (RAU)

You might want to ask the author, Christian, in the said article's message board. "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon "Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

u can make a new bitmap with u want color and put it on your want change area using GDI+

Are you sure that it actually is a grayscale image, and not an indexed image that had a palette of 170 grayscale colors? I found one Lena picture in grascale, that is a GIF image with a 215 color palette. Despite everything, the person most likely to be fooling you next is yourself.

Ohh it's 4bytes, not KB. Thanks Guffa for correcting. You rocks :)/ All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia How to use google | Ask smart questions

Well if you look at my previous posts, you will get a basic idea of what im trying to do. I want to divide up an image using arbitrarily oriented lines, and use points of the polygons to edit the contents within that region. Basically, i use two points to create line segments, whose points will be added to Point arrays of that region. But then again, i as i create the line segments, i have no way to enforce which points to add first.

Try this : Bitmap bitmap = (Bitmap)Bitmap.FromFile(@"D:\colors.jpg"); bitmap.SetPixel(10, 10, Color.Yellow); pictureBox1.Image = bitmap;

Rao Rafique wrote: However u can read the image using byte array...with the help of Marshal.copy method....then copy Half of the array to 1st image array & half to the 2nd image array.... Not a triangle, you couldn't. Not unless you copied one row at a time. And I explained that in depth, you can have the bytes in memory, but not in a format you can view. Christian Graus Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.