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Hi everyone, freshly arrived in the System.Drawing namespace , I try to figure out how it works. But for this precise problem,
I need your help: I am trying to load an image in a Bitmap object. The source file is a .pgm grayscale image (format specifications:
http://netpbm.sourceforge.net/doc/pgm.html)
I don't know if there already exists some method from a class that can help me convert the data or if I should write something on my own. In this last case, I really lack some idea.
As always, it would not be fun if I was not in a hurry, let's say that my project is turning into an emergency.
Any help is welcome
Thx
Law
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write in a memory stream the bmp header and decode the pgm data to the stream and load the stream as a bitmap and voila.
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Thank you for your help.
I just like to insist on the beginner aspect of my question. Could you be a more precise?
I don't think I need the bmp header, I just want to use the System.Drawing.Bitmap class.
Also, the decoding phase from pgm to bitmap is a bit confusing for me. What PixelFormat should I use for the receiving bitmap?
Is the conversion from a single int to a pixel is okay?
grayValue = br.ReadByte();
pixel = Convert.ToInt32(grayValue);
bmp.SetPixel(i, j, Color.FromArgb(pixel,pixel,pixel)
Thanks
Law
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you forgot to scale the grayvalue
# Each gray value is a number proportional to the intensity of the pixel, adjusted by the ITU-R Recommendation BT.709 gamma transfer function. (That transfer function specifies a gamma number of 2.2 and has a linear section for small intensities). A value of zero is therefore black. A value of Maxval represents CIE D65 white and the most intense value in the image and any other image to which the image might be compared.
in the exemple 15 so pixel =(int)((grayValue *255)/15);
PixelFormat should be the default Canonical
# Each gray value is represented in pure binary by either 1 or 2 bytes. If the Maxval is less than 256, it is 1 byte. Otherwise, it is 2 bytes. The most significant byte is first.
so you need to do either a readbyte or readuint16
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Tank you,
but even when scaling, I still have some troubles. I can not understand why.
But the good news is that I have found a library for .NET languages that opens many type of image files. It's called DEvIL.NET and can be found at: http://www.mastropaolo.com/?page_id=20
This solution is easy to set up an works pretty fast.
Thank you for your help CiNN
Law
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Um trying to add web service in a pocket PC application when i debug my solution there is an unhandled exception when trying to connect to the web service. this exception is "Can not establish connection to network". please tell me how I could fix that exception.
Eng.Kholyo
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I'm trying to add a Web Reference to my Project...But cant seem to even get a RSS Feed to add to it...
I right click Add Web Reference, I'v searched for URLs like Microsoft to add a Web Service but cant seem to get any...
I get this error which dont really apply I had already done it in the past "The proxy settings on this computer are not configured correctly for web discovery. Press F1 for more information."
Tools -> Internet Options -> Connections -> Lan Settings ...I did that again...But still cant seem to add a Web Reference...
Any Ideas ?? Thxs In Advance..
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Hello folks.
I currently succeeded to transfer voice through the network using Directsound From directx9 but i need to make equilizer Like in yahoo when the user talks it shows how much the intensity of the voice and how much its volume any help regarding that please on how can i start with this ?
Human Knowledge Belongs to the world.
-- modified at 13:33 Friday 17th February, 2006
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Can any one point me to an application to generate UML from C# code and the other way.
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I've tried a few free UML programs aswell as 'community' editions. Of those that I've tried I think StarUml is the best, it is open source and supports C# generation and reverse engineering.
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Is there a way to determine a users average upload speed in C#?
Im creating a upload manager and want to be able to use the largest chunk size i can to send the file, but this requires knowing what the user can upload (average kbps), is there anything written that can test the upload speed so i can automatically adjust the size of the chunk being sent?
thanks
mcm
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Testing the upload speed is done by uploading something. There isn't really any substitute.
If you can adjust the chunk size during upload, you could just measure the time for each chunk and change the size according to the last results. That would also have the benefit of adjusting to changes in the upload speed during the upload.
---
b { font-weight: normal; }
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I have created a 3D head using Poser, now I want to load that object into windows form crated by C# and also want do zooming, scrolling, rotating and moving of that object after that object load into form
Nothing's Forgotten, nothing's ever forgotten !
-- modified at 12:13 Friday 17th February, 2006
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You're gonna need some 3rd party library to do this; there is no 3d support built into the current .NET framework (although this will change with Windows Vista's .NET version).
For now, you could use Managed DirectX[^].
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Connor's Christmas Spectacular!
Judah Himango
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1) I down loaded a menu bar from the NET and i installed it on a htnl page, but i can not
import it to my C# project.how can this manu bar apear in my C# web project?
2) what command is to source a webpage in to my html Sell ().
Thanks 
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ytubis wrote: 1) I down loaded a menu bar from the NET and i installed it on a htnl page, but i can not
import it to my C# project.how can this manu bar apear in my C# web project?
You'll have to ask the people that wrote the menu bar how to use it in your project.
ytubis wrote: 2) what command is to source a webpage in to my html Sell ().
Ummmm....yeah....perhaps you could rewrite this question so we could understand it?
Are you asking how to take the source of an existing webpage and import it into your C# project?
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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hi
how to use progressbar for long operation for example copying file (please give me an example for copying file with progressbar)
thanks
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http://www.codeproject.com/cs/webservices/DimeBufferedUpload.asp
The above example uses a progress bar to upload large files.
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Hi all,
I save attachments on the harddisk and when the user clicks on a button the file has to open as it does in Open file dialog.The problem is that the file does not open at the same time no error is posted.Please help me.
Here is the code
FileStream fs=File.OpenRead(path);
fs.Close;
path is the path of the filename
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Better check MSDN on the FileStrem object.
Your code does nothing more than open and close the file. No data is read from it.
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FileStream fs = new FileStream(path, FileMode.Open);
fs.Close();
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hi friends:
* Is System.Transaction compatible with SQL Server 200 and MSDE ?
* Do the clients (of a class with System.Transaction) use a proxy DCOM or Net Remoting ? How?
Thanks in advance
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faviochilo wrote: lass with System.Tra
Yes, System.Transaction is compatible with SQL Server 2000 and MSDE.
I'm fairly certain DCOM is used as the underlying implementation.
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I want to use Packet Filter IP to drop internet packet. But I have problem to convert the IP Address Bytes into System.Byte in order to use the PF_FILTER_DESCRIPTOR struct. In the PF_FILTER_DESCRIPTOR it use PBYTE to save the source address and mask (and also for destination). The PBYTE is pointer to the long data type of IPAddress.Address (<- this will produce Int64 data type).
And also i don't want to use unsafe state (because i want my application really safe).
In MSDN I found this "This information must be passed in the host byte order." for SrcDst (and others). I have thinking if I can change the PBYTE into array of Byte, but because it take outside method (from IPHlpAPI.dll) I'm affraid to use what I think.
Thanks.
PS: Can anyone tell me where i can find how to convert Windows Data Type into C# (for example PVOID to ???) ? Thanks so much for help. 
Simple mind programmers, I don't need a complicated mind.
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