C / C++ / MFC

Split images into several regions.

14-Dec-09 10:14

Hi Akhtar,
What is your problem? The name?
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franckesh14-Dec-09 5:06

franckesh

14-Dec-09 5:06

Hi,
I would like to compare some (black& white) images region by region. I want to know how to split an image into many regions with Qt.

franck

Re: Split images into several regions.

Tim Craig14-Dec-09 14:23

Tim Craig

14-Dec-09 14:23

As far as I know, Qt is a GUI framework and not an imageprocessing library. If you're looking for a lot of image processing functions, try OpenCV.

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How to control LEDs using Parallel Port and Turbo C?

--xtiAN_002--14-Dec-09 3:53

--xtiAN_002--

14-Dec-09 3:53

Hello to everyone!

I need some help. How can I control 8 LEDs using parallel port and Turbo C? I have read this article http://www.codeproject.com/KB/cs/csppleds.aspx but it is written in C# language and since I only know C language, I don't know how to program it.

Please help me for the source code in Turbo C. Any help will higly appreciated. Thanks in advance.

Re: How to control LEDs using Parallel Port and Turbo C?

transoft14-Dec-09 4:35

transoft

14-Dec-09 4:35

Using following function to load the dll.

HMODULE hUsbLib = LoadLibrary("inpout32.dll");

GetProcAddress(hUsbLib, "Output");

Rect

kumar sanghvi14-Dec-09 2:29

14-Dec-09 2:29

HI,
Is it possible to draw rect using Normalised coordinates like 0.399567,0.000000,1.000000,0.399369

CPallini14-Dec-09 2:56

14-Dec-09 2:56

GDI+ allows this. Anyway why bother? Simply properly scale the rectagle before drawing it.
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kumar sanghvi14-Dec-09 17:39

14-Dec-09 17:39

pls let me know how can i do that...

loyal ginger14-Dec-09 18:02

loyal ginger

14-Dec-09 18:02

GDI+ uses floating point coordinates. You just need to use GDI+.

kumar sanghvi14-Dec-09 18:37

14-Dec-09 18:37

Let me be more clear...

Suppose i want to draw segments(rect) on a Dialog and the given coordinates of the segemnt is
0.499567,0.000000,1.000000,0.499369 (these coordinates are independent of the width and height of the Dialog Rect) then how to draw the segment with the given coordinates.....

Failed to initialize COM library error

Cedric Moonen14-Dec-09 21:04

Cedric Moonen

14-Dec-09 21:04

Do you sometimes read the answers that are given to you ?

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Software developer

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Le@rner14-Dec-09 1:22

Le@rner

14-Dec-09 1:22

Hi all,

I have made a exe using VS-2008.
I am trying to run that exe on another pc which not having VS-2008 inatalled on it (having OS - win xp with sp3), in my exe i have initialised COM using this code.

hres =  CoInitializeEx(0, COINIT_MULTITHREADED); 
    if (FAILED(hres))
    {
        AfxMessageBox(_T("Failed to initialize COM library") );
		return;                  // Program has failed.
    }

But every time i run my exe on this machine it gives "Failed to initialize COM library".

Do i need to install anything extra on this machine...

Or what other problem there might be?

Can anybody help me in this...

Thanks in advance

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CPallini14-Dec-09 1:38

14-Dec-09 1:38

You should check better the function return value (make your program reporting it). See the documentation for details [^].
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Durga_Devi14-Dec-09 2:07

Durga_Devi

14-Dec-09 2:07

HI,

For the function CoInitializeEx(), dont check for the returned code.
Because if the COM has been initialized on the calling thread, the return code will be failed i.e S_FALSE.
Just call the CoInitializeEx() and proceed to next.

CPallini14-Dec-09 2:17

14-Dec-09 2:17

DurgaDevi_hr wrote:
For the function CoInitializeEx(), dont check for the returned code.
Because if the COM has been initialized on the calling thread, the return code will be failed i.e S_FALSE.

Your point is wrong.

In fact, CoInitializeEx() may return S_FALSE the way you depicted. However FAILED(S_FALSE) evaluates to false.
Smile | :)

transoft14-Dec-09 3:59

transoft

14-Dec-09 3:59

Did you register COM in the new machine?

Using following function always successes for me.

hr = CoCreateInstance( CLSID_App, NULL, CLSCTX_INPROC_SERVER, IID_IUnknown, (void **) &pUnk );

DrawText

kumar sanghvi14-Dec-09 0:32

14-Dec-09 0:32

Hi,
Im trying to draw text on a button which is placed on a Dialog...using the below code in Onpaint

CWnd* pWnd = GetDlgItem(IDC_BUTTON1);
CDC* pDC = pWnd->GetDC();
CRect rect1(3,5,8,10);
pDC->SetTextColor(::GetSysColor(COLOR_HIGHLIGHTTEXT));
pDC->SetBkColor(::GetSysColor(COLOR_HIGHLIGHT));
CBrush brush(RGB(0,0,64));
pDC->SelectObject(&brush);
pDC->DrawText(_T("Example"),&rect1,DT_LEFT|DT_SINGLELINE|DT_VCENTER);
CDialog::OnPaint();

but the above code doesn"t reflect the text...
pls correct me...

CPallini14-Dec-09 0:42

14-Dec-09 0:42

Yout cannot do that, that way. See, for instance [^].
Smile | :)

kumar sanghvi14-Dec-09 0:54

14-Dec-09 0:54

Thanks for ur Reply...but the button control is from Resource not a custom Control....
Is it not possible to draw text on a control which is created from resource..?

CPallini14-Dec-09 0:59

14-Dec-09 0:59

Usually the button is loaded from resource (where is stored with BS_OWNERDRAW style).
Smile | :)

kumar sanghvi14-Dec-09 1:02

14-Dec-09 1:02

If Possible can u explain in more detail..i didn"t get the point..

CPallini14-Dec-09 1:29