C / C++ / MFC Discussion Boards

Nelek11-Jan-10 7:39

11-Jan-10 7:39

I think I have to readapt the "if you drink, don't drive" with "if you drink, don't post in CP", it is my second missunderstanding today D'Oh! | :doh:

Regards.
--------
M.D.V. Wink | ;)

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
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Re: OT

CPallini11-Jan-10 7:43

CPallini

11-Jan-10 7:43

Nah, I post here only while I'm very well drunk... Beer | [beer]

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: OT

Cedric Moonen11-Jan-10 7:55

Cedric Moonen

11-Jan-10 7:55

Aaah, ok, now I understand Poke tongue | ;-P

Cédric Moonen
Software developer

Charting control [v3.0 - Updated]
OpenGL game tutorial in C++

Re: OT

CPallini11-Jan-10 7:59

CPallini

11-Jan-10 7:59

Cedric Moonen wrote:
Aaah, ok, now I understand

Noooooooooooo, you cannot understand: you're just freshly married... Big Grin | :-D

Re: Help on error

Richard MacCutchan11-Jan-10 8:44

Richard MacCutchan

11-Jan-10 8:44

siyuanfang wrote:
I got a compilation error "error C2632: 'float' followed by 'char' is illegal " for the line:
"float small,

If you hover your mouse over the word small it shows #define small char, and Go To Definition takes you to line 153 in RpcNdr.h.

Hey Richard

CPallini11-Jan-10 8:53

CPallini

11-Jan-10 8:53

I've the variable

float hops;

causing a similar problem.
Could you please indicate the header file and the line number of the troubling #define?
Big Grin | :-D

Re: Hey Richard

Richard MacCutchan11-Jan-10 8:58

Richard MacCutchan

11-Jan-10 8:58

CPallini wrote:
float hops;

Sorry, doesn't show up in my compilation unit. If you get the problem why can't you find its definition using the method above? Or are you not using Visual Studio?

[edit]But I suspect 'hops' has something to do with TCP/IP[/edit]

Re: Hey Richard

CPallini11-Jan-10 9:39

CPallini

11-Jan-10 9:39

Richard MacCutchan wrote:
Or are you not using Visual Studio?

Yes, I'm using Visual Beck's.

Richard MacCutchan wrote:
[edit]But I suspect 'hops' has something to do with TCP/IP[/edit]

Actually I suspect it is related to Lager/Brewing... Big Grin | :-D

Re: Hey Richard

Richard MacCutchan11-Jan-10 11:35

Richard MacCutchan

11-Jan-10 11:35

Aaargh! you got me ... Laugh | :laugh:

how to write a function in a file at binary level (after compilation)

Joseph Marzbani11-Jan-10 6:15

Joseph Marzbani

11-Jan-10 6:15

I know this may look a little more than a little strange! But for a reason I want to write a whole function in a file at run-time. OK, let's do some clarification:

see you have a function like:

void foo ()
{
        your code ...
}

after compilation we have some thing like:

// foo()
 
push 210
mov eax, ebx
...

and in binary level:

// foo()

E8 00 DA 65 00 00 DF

What I need is to write these binary codes in a file.

Note

1- There's no such an instruction like mov eax, eip or pop eip in Intel instruction set. Actually there's no instruction to get or set eip directlt.

Thank you masters!

Re: how to write a function in a file at binary level (after compilation)

CPallini11-Jan-10 6:36

CPallini

11-Jan-10 6:36

Why don't you get the compiler output?

Re: how to write a function in a file at binary level (after compilation)

Joseph Marzbani11-Jan-10 6:47

Joseph Marzbani

11-Jan-10 6:47

because I need to write it anywhere I want. I don't want to use the simple copy-paste method.

Re: how to write a function in a file at binary level (after compilation)

CPallini11-Jan-10 6:52

CPallini

11-Jan-10 6:52

The you have to write a compiler... Smile | :)

Re: how to write a function in a file at binary level (after compilation)

Bram van Kampen11-Jan-10 16:01

Bram van Kampen

11-Jan-10 16:01

As I understand it, you want to include in your executable, a number of Datablocks which you want to use as prototype executable files, to be called by your process. This can be done, and I've done it. If that's what you want, it also requires No ASM Code to implement!

Smile | :)

Bram van Kampen

detect a hole in a binary image

franckesh11-Jan-10 5:31

franckesh

11-Jan-10 5:31

Hi,
I have a binary image with black background and a white object. I want to implement c++ codes that will detect when there is a hole in the object (black cell in the white object). I want to be able to know precisely the size of the hole and where it is located on the object.

Can someone give me any advice.
Thanks in advance,
Franck

Re: detect a hole in a binary image

Nelek11-Jan-10 5:52

Nelek

11-Jan-10 5:52

One possibility could be using GetPixel ().

If you know the coordenates of that white shape, then you can just check in the shape if the pixels contained are white or black and increment a counter to know the area of the target object.

Regards.
--------
M.D.V. Wink | ;)

Re: detect a hole in a binary image

franckesh11-Jan-10 5:59

franckesh

11-Jan-10 5:59

Thanks for the answer,
Unfortunately, I do not know the coordinates of the white shape.

Franck

Re: detect a hole in a binary image

Nelek11-Jan-10 6:23

Nelek

11-Jan-10 6:23

Then you are going to use the same to locate it first.

If the white object is with a random shape, and random coordinates I think you are going to check the whole image, and then process it.

You can get an approach of using a 2d array full with 0 (black) and 1 (white) to simbolize the image.

Regards.
--------
M.D.V. Wink | ;)

Re: detect a hole in a binary image

C^hris L^osinger11-Jan-10 7:23

C^hris L^osinger

11-Jan-10 7:23

the main term you'll need to research is "blob detection and analysis".

it's a big and complicated subject, however.

image processing toolkits | batch image processing

Re: detect a hole in a binary image

Rozis11-Jan-10 15:12

Rozis

11-Jan-10 15:12

maybe i can help you.

You will have to scan your image pixel by pixel. Getpixel() is one approach but is not very quick. The second approach is to get a pointer to the pixeldata. I'm not sure what you want to do with the results but one of the things you could do is to create a region (a clipping area) of those holes. Weaponed with that you could fill it or do everything you like. A region will not give you a direct insight of the size (because it may be a complex (non-rectangular) object) but -although unknown- holds a representation of the hole.

If you feel this approach will help you feel free to send me an email - I can give you an algorithm to create a region from a complex figure.

Rozis

Re: detect a hole in a binary image

Bram van Kampen11-Jan-10 16:15

Bram van Kampen

11-Jan-10 16:15

franckesh wrote:
I have a binary image with black background and a white object. I want to implement c++ codes that will detect when there is a hole in the object (black cell in the white object). I want to be able to know precisely the size of the hole and where it is located on the object.

What is the nature of the binary image. It appears to describe a Picture. Now,Is it a Bmp (Bitmap), Is it a GIF File, what is it, or, is it just that, an image prior to capture(e.g. in your mind only).
What can open and display it as a File? Is it per chance encrypted?

None( Or maybe very few) of the contributers are clarevoyants. You want to be more specific before you can expect a reasonable answer. I suggest that a bout of reading may solve a lot.

Smile | :)

Bram van Kampen

Re: detect a hole in a binary image

franckesh11-Jan-10 23:19

franckesh

11-Jan-10 23:19

Thanks for the reply,
the binary image is a picture of a boat. The boat has an arbitrary shape. And the file is a bmp file.

Franck

Re: detect a hole in a binary image

Shiju PK12-Jan-10 0:56

Shiju PK

12-Jan-10 0:56

Hi,

I guess this problem can be solved by 4/8 connected components alogorithm. do a runlength encoding of image
and perform a depth first search to find connected components , from that you can identify holes.

Regards,
Shiju

Re: detect a hole in a binary image

Alan Balkany12-Jan-10 5:20

Alan Balkany

12-Jan-10 5:20

First find the hole, then search in an expanding spiral to find the hole's bounds.

Searching every pixel in the image is slow. If you have any advance knowledge about the image and hole, you can use this to speed up the search.

For example, if you know the hole will be over 10 pixels wide, you can search every 10th pixel, looking for the hole. This will speed up your search by a factor of 10.

Adding a browse button internal to an Edit Control

maycockt11-Jan-10 3:54

maycockt

11-Jan-10 3:54

Hi,

I have created a little custom CListCtrl that uses CComboBox and CEdit.
I need to use my edit control for displaying a path.

Is it possible to add the browse option, i.e. when the edit control is selected a browse button appears at the end of the Edit Control?

TIA

Tony

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