Re: compare images - C / C++ / MFC Discussion Boards

Re: sprintf

Tim Craig23-Nov-09 18:31

Tim Craig

23-Nov-09 18:31

Ever the cockeyed optimist. Laugh | :laugh:

You measure democracy by the freedom it gives its dissidents, not the freedom it gives its assimilated conformists.

Create HDC from n image file?

o m n i23-Nov-09 10:30

o m n i

23-Nov-09 10:30

Sorry if this is a basic question, I'm new to C++. How would I go about creating a DC for an image from a file (.png) and then getting the HDC of said DC.

Re: Create HDC from n image file?

Richard MacCutchan23-Nov-09 12:25

Richard MacCutchan

23-Nov-09 12:25

The MSDN documentation on Device Contexts[^] contains the functions you may use to paint onto any surface real or virtual.
See also the documentation on Windows GDI for useful tutorials, or this CodeProject Article[^] on bitmaps.

Picture control with more than 256 colors in VC6 Dialog?

Erik23-Nov-09 8:06

Erik

23-Nov-09 8:06

Hi,

I am currently trying to insert a picture control with more than 256 colors in a MFC dialog in a VC 6.0 project. However, when I paste the bitmap, the IDB_BITMAP resource looks correct, but when I try to reference it in a static picture control, the color depth is decreased dramatically.

How can I display a bitmap ressource with 24 or 32 bit in a MFC 6.0 dialog?

Re: Picture control with more than 256 colors in VC6 Dialog?

«_Superman_»23-Nov-09 8:38

«_Superman_»

23-Nov-09 8:38

Try replacing the .BMP file that is created in the res sub folder with the high color bitmap file.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

compare images

franckesh23-Nov-09 6:55

franckesh

23-Nov-09 6:55

Hey,
I would like to write a c++ program that compares 2 images.In fact, I have many B&W images of a boat. I want to compare the contours, so that I could know how alike the images are. And, I want to be able to know the error percentage after comparing.

Do you have any advice or can you tell me any paper or book could help me.

Thanks in advance,

Franckesh

Re: compare images

Tim Craig23-Nov-09 9:35

Tim Craig

23-Nov-09 9:35

Go to Google, hit advanced search, limit the document types to .pdf, the websites to .edu, enter your search terms, and hit Search. You should get more papers than you can read in a year.

You measure democracy by the freedom it gives its dissidents, not the freedom it gives its assimilated conformists.

Re: compare images

Rozis23-Nov-09 11:32

Rozis

23-Nov-09 11:32

Maybe a strange tip:

Take a picture (1) and make a copy (2) of it. Now put the picture and the copy in a zip. Write down the filesize of the zip. Nex,t take another picture (3) and put it together with the original (1) into a second zip. Write down the filesize of the 2nd zip. Continue this till all pictures are put in zips. If you have 10 pictures you will have now 10 zips. Sort the zips to filesize. The zip containing your original (1) and its copy will have the smallest filesize. The next zip will contain that picture that resembles the original the most. And so on.

How this works: Zip searches for duplicate bitpatterns (this is how compression works). In the smallest zip it finds the most (coz their are 2 identical pics). The picture that resembles the first one the most is the one that has a little less duplicate bitpatterns (it compresses slightly worse). The filesize of the zip is an indicator of the resemblance.

Note: You will have to create zips for all the combinations...

The theory behind: Colmogorov complexities...

If you try this solution i would be pleased if you keep me informed of you results.

Rozis

Re: compare images

franckesh25-Nov-09 0:33

franckesh

25-Nov-09 0:33

Thank U, but I would like to know how to implement c++ codes to compare two b&W images pixel per pixel.
Or is there any better way to do implement the differences btw the images(if not pixel per pixel).

Thanks,
Franckesh

IBM -> IEEE

Russell^'23-Nov-09 4:52

Russell^'

23-Nov-09 4:52

Is there any macro or function that converts an IBM floating point value to float?

This article explains better the question

Transform between IEEE, IBM or VAX floating point number formats and bytes expressions[^]

Russell

WinDBG: How to locate a symbol in code segment

krishiyengar23-Nov-09 4:51

krishiyengar

23-Nov-09 4:51

Hi,

In my minidump I am not getting proper call stack, but I do know one function which was called and its address comes as 0x0a415210. I want to locate the calls to this symbol, but don't know the range of memory were this could be.

Does anyone know how to locate the calls to this symbol in WinDBG?

Thanks

Re: WinDBG: How to locate a symbol in code segment

«_Superman_»23-Nov-09 5:45

«_Superman_»

23-Nov-09 5:45

If it is the microsoft symbols that you want select File -> Symbol File Path from the Windbg menu and enter the string SRV*<your local symbol folder>*http://msdl.microsoft.com/download/symbols.

If the symbols belong to the project you created, put your PDB file in a folder and give the path to that folder as stated above. You can separate multiple statements using ;.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Calling another execuatbles from windows service???

jain_MS23-Nov-09 3:24

jain_MS

23-Nov-09 3:24

Hi ,
I have created a windows service project WindowsService1 and i have Win32 console project AppServer which is also in the same solution.

Now when i saw my service details as

Service1
LOcation: C:\testing\WindowServerice1\WindowsService1.exe

But i want to have like
Service1:
Location: C:\testing\Appserver\Appserver.exe

Your help much Appreciated.

Regds
Jain

Re: Calling another execuatbles from windows service???

Rajesh R Subramanian23-Nov-09 3:31

Rajesh R Subramanian

23-Nov-09 3:31

Are you just wanting to change the output directory? Look into the project settings.

Correct me if I got you wrong.

“Follow your bliss.” – Joseph Campbell

Re: Calling another execuatbles from windows service???

jain_MS23-Nov-09 3:59

jain_MS

23-Nov-09 3:59

Hi Rajesh,
Thanks for ur reply.

Intially , i have 2 project in my solution (1)Win32 Application- AppServer , (2) Setup project .
from this i created an MSI and installed my AppServer.exe to local & remote machine.

Now my requirement is , i have to register my application as windows services, so i have added one more project as WindowsService1
from VC++->Windowservice option,

i have builded all the 3 project and installed my Setup project , i tried to start my exe from services.msc, but here i am able to see

Servicename: Service1
Path: C:\testing\windowsService1\WindowsServcie1.exe
not C:\testing\AppServer\Appserver.exe

I need my Servicename as : Service1
& Path as C:\testing\AppServer\Appserver.exe

i mean my service has to point to my Win32 application exe.

Plz thru some light on this
Your help much appreciated.

Regds
Jain

Re: Calling another execuatbles from windows service???

Rajesh R Subramanian23-Nov-09 6:25

Rajesh R Subramanian

23-Nov-09 6:25

I'm not sure if you need a third project, just for the sake of registering your executable as a windows service. In my opinion, the setup must have provision to register a program being installed as a service. Have you checked on that?

“Follow your bliss.” – Joseph Campbell

Re: Calling another execuatbles from windows service???

jain_MS23-Nov-09 7:07

jain_MS

23-Nov-09 7:07

Yes Rajesh, i am able to install a service thru setup project (if i select windows service project template) ,

THE PROBELM IS:

i have

solution :testing
project1: windowsservice1 (Windowsservice project)
project2: AppServer (Win32 application project)---> this is my main application AppServer.exe
project3: ServerSetup (SetupProject)

If i do run my MSI file from ServerSetup, its installing AppServer.exe to C:\program files\AppServer\AppServer.exe
and in Services i have only Servicename: AppServer , Path :C:\program files\AppServer\WindowsService1.exe (instead of AppServer.exe)

i hope nw i expained correctly Smile | :)

Regds
jain

Batch file

john563223-Nov-09 3:02

john5632

23-Nov-09 3:02

Hi All,

How can build my project(vc8) using batch file in both type i.e debug and release?

Re: Batch file

Richard MacCutchan23-Nov-09 3:25

Richard MacCutchan

23-Nov-09 3:25

Try the devenv[^] command from Microsoft. Alternatively you can create your own makefile[^] and use that.

Re: Batch file

T210223-Nov-09 3:46

T2102

23-Nov-09 3:46

Visual Studio 2008 example
"C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\VCExpress.exe" "C:\Projects\Error_Code\Error_Code.sln" /rebuild Debug /OUT "C:\LOGS\Debug\Error_Code.log"

Visual Studio 2005 example
cd C:\Program Files\Microsoft Visual Studio .NET\Common7\IDE
devenv.exe "C:\Projects\Error_Code\Error_Code.sln /rebuild Debug /OUT "C:\LOGS\Debug\Error_Code.log" /projectconfig Y3 /projectconfig EHsc /projectconfig RTC1 /projectconfig MDd /projectconfig RTCC /OUT

Linking Error

john563223-Nov-09 2:24

john5632

23-Nov-09 2:24

Hi All,

I am getting the error while building the project. What can be cause of this error......

names.obj : error LNK2001: unresolved external symbol _f002procedure_coverage_informat
names.obj : error LNK2001: unresolved external symbol _f000close_coverage_data_output_
names.obj : error LNK2001: unresolved external symbol _f000open_coverage_data_output_s
names.obj : error LNK2001: unresolved external symbol _f000finish_coverage_measurement
names.obj : error LNK2001: unresolved external symbol _initialize_code_coverage_module
run.obj : error LNK2001: unresolved external symbol _initialize_code_coverage_module
Debug_Test/ext_tests.exe : fatal error LNK1120: 77 unresolved externals

Re: Linking Error

kikoso23-Nov-09 2:43

kikoso

23-Nov-09 2:43

Check if you added to the Visual Environment, as a first step, the correct configuration for external libreries:

* Open Visual
* Choose menu "Tools" and select "Options"
* In "Projects and Solutions" and go to "VC++ Directories"
* Show directories for "Library Files" and "Include files"
* Add your libraries and includes you need for your project.

This is the most common error while linking Wink | ;)

Re: Linking Error

john563223-Nov-09 3:01

john5632

23-Nov-09 3:01

This application is in vc6 and I have no much idea about vc6...Could you tell me how to do in vc6

Re: Linking Error

kikoso23-Nov-09 5:16

kikoso

23-Nov-09 5:16

mmmm... I would say is basically the same :S

Problem with Win32 Threads

kikoso23-Nov-09 2:13

kikoso

23-Nov-09 2:13

Hello all,

I´m trying to multithread an application by using CreateThread function. So far I´ve done the following:

//Here I initialize the Thread
LPDWORD iID;
HANDLE hThread; // array of thread handles
hThread = CreateThread (
            0, // Security attributes
            0, // Stack size
            (LPTHREAD_START_ROUTINE)OpenCVWin32::Form1::Threadi,
            NULL,
            CREATE_SUSPENDED,
            iID);
}

//Called function
static DWORD WINAPI Threadi()
{
	System::Windows::Forms::MessageBox::Show("Hi there!");
	return 0;
}

When I launch the application, the thread is not created, as I cannot go inside the Threadi function. I´m right now using VC++ 2008. Does anyone has a suggestion on why this could be happening?

Thanks

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.