C# Discussion Boards - CodeProject

Re: Bitmap Image to Binary Image (Black & White)

OriginalGriff3-Mar-10 6:27

OriginalGriff

3-Mar-10 6:27

Yes. If they are black and white, then specify the System.Drawing.Imaging.PixelFormat.Format1bppIndexed mode.

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Re: Bitmap Image to Binary Image (Black & White)

ant-damage4-Mar-10 10:31

ant-damage

4-Mar-10 10:31

See the link below.
It is a test image which I want to convert to binary image
I forgot to mention something. The binary image is to be used in C++ source files.

http://img176.imageshack.us/img176/744/boxm.png[^]

Here is the expected result:

unsigned char box[27] = {
	0xf8,0xff,0x3,
	0x6,0x0,0xc,
	0x1,0x0,0x10,
	0x1,0x0,0x10,
	0x1,0x0,0x10,
	0x1,0x0,0x10,
	0x1,0x0,0x10,
	0x1,0x0,0x10,
	0x1,0x0,0x10 };

Re: Bitmap Image to Binary Image (Black & White)

OriginalGriff4-Mar-10 22:07

OriginalGriff

4-Mar-10 22:07

ant-damage wrote:
The binary image is to be used in C++ source files.

Does this mean that you want to use this as an image in your application - for a button or other control? Because if so, you don't have to convert it to binary.

Re: Bitmap Image to Binary Image (Black & White)

ant-damage23-Mar-10 3:13

ant-damage

23-Mar-10 3:13

I want to use it as a sprite for my CASIO fx-9860G calculator. It is to be used in add-ins.

Re: Bitmap Image to Binary Image (Black & White)

ant-damage17-Apr-10 12:54

ant-damage

17-Apr-10 12:54

I've now created a class that can convert bitmaps (*.bmp; *.png) to binary images (0xFF 0x89 0x78 0x65), but now my problem is that some bitmaps have grey, and to display it on a B&W LCD I need to emulate the grey effect by using double-buffering (I've mastered the double-buffering issue).
Both buffers are displayed to the screen with an especial delay, to created the grey effect.

Re: Bitmap Image to Binary Image (Black & White)

Ennis Ray Lynch, Jr.3-Mar-10 6:31

Ennis Ray Lynch, Jr.

3-Mar-10 6:31

I recall that someone has an article somewhere that has instructions that can do this very quickly. But I can't seem to recollect who that was.

Painless yet unsafe grayscale conversion in C#[^]

BTW, your English is fine.

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Re: Bitmap Image to Binary Image (Black & White)

Luc Pattyn3-Mar-10 6:43

Luc Pattyn

3-Mar-10 6:43

Your memory is completely fading now, he wants binary, not grayscale.

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Re: Bitmap Image to Binary Image (Black & White)

Ennis Ray Lynch, Jr.3-Mar-10 8:00

Ennis Ray Lynch, Jr.

3-Mar-10 8:00

My memory may be failing but last time I checked that article provided a fast way to get all pixel information as well as write out said pixel information. The actual grayscale conversion is trivial when compared to the rest of the code. And if I recall the question, it was how can I quickly ... which the article addresses. As for binary image that is an exercise left to the reader. But then again, if you keep the gray scale logic you can then apply your threshold statement and get the binary result as well.

Re: Bitmap Image to Binary Image (Black & White)

Luc Pattyn3-Mar-10 8:30

Luc Pattyn

3-Mar-10 8:30

Of course.

BTW: he may be needing a dynamic threshold to get acceptable results on more difficult images, e.g. when luminance is varrying wildly.

Smile | :)

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Can you target .NET and .NET CF from one project?

hairy_hats3-Mar-10 4:57

hairy_hats

3-Mar-10 4:57

Hi all,

Is it feasible to have a single DLL project which targets both .NET desktop and .NET CF through different configurations?

TIA!

Re: Can you target .NET and .NET CF from one project?

Dave Kreskowiak3-Mar-10 6:21

Dave Kreskowiak

3-Mar-10 6:21

I've never done it, but I can see problems with doing so. Since .NET CF is a subset of the full version of the framework, your .DLL would be limited to code, classes, and methods that only work and exist in the CF version of the framework. You'd be using the exact same .DLL for both devices.

So, just as a result from a thought experiment, I'd say no, you can't.

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Re: Can you target .NET and .NET CF from one project?

hairy_hats3-Mar-10 6:56

hairy_hats

3-Mar-10 6:56

From Google and experiment, you can, because you can add a reference to a CF DLL to a full .NET project, so it is possible provided you only need to reference stuff from the CF.

Re: Can you target .NET and .NET CF from one project?

Som Shekhar3-Mar-10 7:01

Som Shekhar

3-Mar-10 7:01

Plan your project with CF only. It will automatically work with full .net.

Re: Can you target .NET and .NET CF from one project?

Dave Kreskowiak3-Mar-10 8:36

Dave Kreskowiak

3-Mar-10 8:36

That's what I said.

Yeah, you can make a .DLL that will work on both, PROVIDED you don't use anything that won't work in CF. In that case, what's the point? All you're doing is writing code for the least functional framework. You're not actually targeting different frameworks. You're targeting the CF only, and the resulting .DLL just happens to work on the full .NET CLR.

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But no longer in 2009...

Re: Can you target .NET and .NET CF from one project?

hairy_hats3-Mar-10 11:01

hairy_hats

3-Mar-10 11:01

Dave Kreskowiak wrote:
what's the point?

Well, code re-use, ease of maintenance, etc etc etc. If you don't need anything that isn't in the CF then I would say there's a LOT of point, especially if like me you have classes and data structures that you need to use on both.

Re: Can you target .NET and .NET CF from one project?

Dave Kreskowiak3-Mar-10 11:53

Dave Kreskowiak

3-Mar-10 11:53

If only it was that easy. There's a LOT more to it than just adding a reference and making sure you don't call a method in the class that isn't supported on CF.

I'll leave it up to you to try a quick test and find out. It shouldn't take you but more than 20 minutes to put together a class in the full .NET class library project, then try it in a CF app.

A guide to posting questions on CodeProject[^]

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Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

Creating graphics object

gwithey3-Mar-10 4:09

gwithey

3-Mar-10 4:09

Is it possible to create a graphics object in the constructor of a normal calss in order to measure a string? Not using a form or control?

Graphics g = ?
         m_nodeSize = g.MeasureString(m_name, nodeFont);

Thanx George

Re: Creating graphics object

kevinnicol3-Mar-10 4:21

kevinnicol

3-Mar-10 4:21

Graphics g = Graphics.FromImage(new Bitmap(80, 80));

Give that a shot.

Re: Creating graphics object

gwithey3-Mar-10 4:28

gwithey

3-Mar-10 4:28

Thank you Kevinnicol

That worked great, i was looking for something like that.

public static SizeF MeasureString(string s, Font font)
   {
       SizeF result;
       using (var image = new Bitmap(0, 0))
       {
           using (var g = Graphics.FromImage(image))
           {
               result = g.MeasureString(s, font);
           }
       }

       return result;
   }

Did see this example but preffer the below:

// Generate nodeSize by measuring the name of the node
        Graphics g = Graphics.FromImage(new Bitmap(80, 80));
        m_nodeSize = g.MeasureString(m_name, nodeFont);

Thanx George

Re: Creating graphics object

Pete O'Hanlon3-Mar-10 4:51

Pete O'Hanlon

3-Mar-10 4:51

gwithey wrote:
Graphics g = Graphics.FromImage(new Bitmap(80, 80)); m_nodeSize = g.MeasureString(m_name, nodeFont);

Sorry, did you mean to say that you prefer this version? If so, please don't - use the version above it instead as that disposes of managed resources instead.

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Message Closed

3-Mar-10 4:27

stancrm

3-Mar-10 4:27

Message Closed

modified 23-Nov-14 6:41am.

Re: Creating graphics object

gwithey3-Mar-10 4:31

gwithey

3-Mar-10 4:31

Thank you stancrm

I saw this however couldnt find a solution as:

Graphics g;
        // Sets g to a graphics object representing the drawing surface of the
        // control or form g is a member of.
        g = this.CreateGraphics();

Only works in a control or on a form. Not in a normal C# class

Thanx George

Web Service Threading and State

il_manti3-Mar-10 4:02

il_manti

3-Mar-10 4:02

Hi all,

I have an issue and I'd like to find a cleaner solution (as, right now, my work around is dirty beyond recognition Poke tongue | ;-P

).

This is the structure

"Search" (A web service method) is called by Web Site
"Search" calls two other Web Service methods Asynchronously
Each Async method calls a "Completed" method (one each) and each "Completed" method checks if the other one was finished before it
Once both Async calls have been finished another method ("Connect Results") is called by the last finished "Completed" method
"Connect Results" gathers data from two files (saved from each async method) and joins them into one instance of a class "Final Result" which needs to be returned

BUT since the method "Search" needs a return and because the return line is reached before any of the threads have finished executing, the return is always empty.

So I inserted a while loop (which checks that "Final Result" is not empty) before the last "return" line of "Search" which does nothing except wait for the class to be filled!

I'm sure there's some other way to do this... something cleaner but I can't seem to find it.

Thanks for your help and sorry for the long post...

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Installer

Syed Shahid Hussain3-Mar-10 1:12

Syed Shahid Hussain

3-Mar-10 1:12

Hei,

I want to make an installer which can do the following task;

1. Install Dot net fram work 3.0
2. Install CR Merge module 11
3. Install MSDE
4. Create Databes
5. Install Application

what is the best practice or any idea?

thanks

Syed Shahid Hussain

Re: Installer

Richard Andrew x643-Mar-10 8:18

Richard Andrew x64

3-Mar-10 8:18

Use the Windows Installer and create MSI files. That's your best bet.

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