I would like to be able to compare BackgroundImage Property of two picture
boxes on my form.

How can I do that?

I am using :

if (pctOne.BackgroundImage Is pctTwo.BackgroundImage) then
// blah, blah, blah
end if

, but this does not work.

Any help will be appreciated.


--
Dino Buljubasic
Software Developer
http://rivusglobal.com

Hello,

"Dino M. Buljubasic" <(E-Mail Removed)> schrieb:
> I would like to be able to compare BackgroundImage Property of
> two picture boxes on my form.
>
> How can I do that?
>
> I am using :
>
> if (pctOne.BackgroundImage Is pctTwo.BackgroundImage) then
> // blah, blah, blah
> end if
>
> , but this does not work.

The code above will compace the references represented by the
'BackgroundImage' properties. Do you want to compare the _images_
("bitmaps") or the _references_?

Comparing the images is really slow in VB.NET. It's better to use something
like this C# routine using pointers (*grml*):

http://www.palmbytes.de/content/dotn...magecompare.cs

Regards,
Herfried K. Wagner
--
MVP · VB Classic, VB.NET
http://www.mvps.org/dotnet

Thanks Herfried,

I'd like to compare the bitmaps (or jpg). Is there a way to do that in
VB.net?

Regards,

--
Dino Buljubasic
Software Developer
http://rivusglobal.com

"Herfried K. Wagner [MVP]" <(E-Mail Removed)> wrote in message
news:%(E-Mail Removed)...
> Hello,
>
> "Dino M. Buljubasic" <(E-Mail Removed)> schrieb:
> > I would like to be able to compare BackgroundImage Property of
> > two picture boxes on my form.
> >
> > How can I do that?
> >
> > I am using :
> >
> > if (pctOne.BackgroundImage Is pctTwo.BackgroundImage) then
> > // blah, blah, blah
> > end if
> >
> > , but this does not work.
>
> The code above will compace the references represented by the
> 'BackgroundImage' properties. Do you want to compare the _images_
> ("bitmaps") or the _references_?
>
> Comparing the images is really slow in VB.NET. It's better to use
something
> like this C# routine using pointers (*grml*):
>
> http://www.palmbytes.de/content/dotn...magecompare.cs
>
> Regards,
> Herfried K. Wagner
> --
> MVP · VB Classic, VB.NET
> http://www.mvps.org/dotnet
>
>

Hello,

"Dino M. Buljubasic" <(E-Mail Removed)> schrieb:
> I'd like to compare the bitmaps (or jpg). Is there a way to do that in
> VB.net?

Really slow: Loop through the 'Bitmap' object's pixels and compare the
colors at (x, y). You can get the color of the pixel at position (x, y) by
calling the 'Bitmap' objects's 'GetPixel' method.

Regards,
Herfried K. Wagner
--
MVP · VB Classic, VB.NET
http://www.mvps.org/dotnet

Hi again,

Another way - a bit of a cheat - save both to disk and then do a file
compare. :-)

Regards,
Fergus

:-)))

Hello,

"Fergus Cooney" <filter-(E-Mail Removed)> schrieb:
[Algorithm for comparing bitmaps]

> Hope this informs, if nothing else.

Are you sure that this is faster than comparing each pixel?

Regards,
Herfried K. Wagner
--
MVP · VB Classic, VB.NET
http://www.mvps.org/dotnet

Hello,

"Fergus Cooney" <filter-(E-Mail Removed)> schrieb:
> Another way - a bit of a cheat - save both to disk and then do a file
> compare. :-)

Maybe it's even possible to save the bitmaps to 'FileStream's.

Regards,
Herfried K. Wagner
--
MVP · VB Classic, VB.NET
http://www.mvps.org/dotnet

Hello,

"Cor" <(E-Mail Removed)> schrieb:
> :-)))

It would be great if you quote the paragraph you are referring to so others
can understand what you mean.

Regards,
Herfried K. Wagner
--
MVP · VB Classic, VB.NET
http://www.mvps.org/dotnet

Herfried,
I will keep it im mind something more, I dont like the way from long
messages where somewhere is some text but I will try to do it on a better
way.
For this one it was not by accident, it was very special. I don't want a
discussion with others.
grrrrrrrrrrrrrr :-) Is that enough in this situation?
Cor