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If you are looking for similar bitmaps contained in other bitmaps, then I suggest you start by looing at the Hausdorff distance. This can get computationally intensive.
If you feel comfortable with complex analysis, though, you might want to look into Jacek Turski's Geometric Fourier Analysis of the Conformal Camera for Active Vision. You can compute the convolution of the Fourier transforms of the complex transformation that he describes to evaluate similarities. His system models a foveated camera, though; if you don't need that, maybe just vanilla Fourier transforms and convolution computation would work.
"we must lose precision to make significant statements about complex systems."
-deKorvin on uncertainty
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Hello dear all
i am facing a problem in crystal report. that crystal report is working well in windows 200 server but not working in windows XP. i have created one cystal report in .NET C#. this is giving error when i open this crystal report in windows XP operating system. it display a one dilaog and get user name and password. in my sql server 2000 i have set SQL Server Authentication and when i open that report then it display a dialog. this dialog does not display in windows 2000 operating system. i use same SQL Server Authentication in SQL Server 2000.
please help what can i do for this issue
Priyank Gupta
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I have a problem with form inheritance in .Net 2005.
When I add a control to the new form which is inherited from base form, I couldn't change its size by mouse, I only change it by using shift and arrow keys or by changing value of size from properties dialog box.
Is there any solution of this problem?
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Dear friends,
I have a UserControl with an ActiveX control Filled in it.In fact this is a simple .NET wrapper for this COM component. I want to filter windows messages JUST for my control and prevent the COM component to receive Right Click events.
Note that I don't want to use from Application.AddMessageFilter to filter messages in all application scope. I want to prevent this message JUST in my user control.
The importatnt note is that,this OCX doesn't handle .NET MouseClick event.
Thanx...
[ _ Always there is another way _ ]
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hi
I wonder of someone can help me with this Substring operation.
I have : "12.10" or "120.10"
Now I want to convert these values to : "1210" or "12010"
Basically, I want to removce the dot within my strings. How can I do this.?
Thanks
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Locate the dot and get the string before and after:
int pos = myString.indexOf('.');<br />
string newString = myString.Substring(0, pos) + myString.Substring(pos + 1);
Or why not simply replace the dot?
string newString = myString.Replace(".", string.Empty);
---
b { font-weight: normal; }
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Or using Trim
<italic>Work hard, Work effectively.
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Trim only removes characters from the beginning or end of a string.
---
b { font-weight: normal; }
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the best solution is Guffa's answer
string sub = "12.10";
MessageBox.Show(sub.Replace(".",string.Empty));
result is 1210
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Hi all,
I'm working in C# with a unmanged Dll that provides me a pointer to a byte buffer (768x576) that holds some video data. Is there any fast way to access the data and work e.g. with a bitmap object?
Currently I'm converting the data by the help of: System.Runtime.InteropServices.Marshal.ReadByte
But that is to slow for me.
Any suggestions?
Thanks,
Snow.
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Thanks for your hint.
But I knew already that I can use pointers and I also used code simiar to the example. What I dont like in this solution is the "byte per byte" transfer to the new buffer. Isnt there a way to copy a complete block (like in C++ "memcpy" wich should be faster than a byte per byte transfer)?
Thanks again
Snow
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MDI Container has child forms, in VS.net2003 automatically "Windows" menu (is menu u can cascade forms for example) shows child forms' names but at VS.net 2005 menuitem object doesnt have any property you can set to show names. :S
How can i do?
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Is there any way i can skip this message, its not so bad on one computer, i can just click, do not show this message again.
But how can i unblock the app for other computers.
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Hi all,
i have created a text editor in c# using the RichtextBox,
But when i set a Font and try to type something the text gets typed in the
default font i.e. Microsoft San Serif
i am working on a Japanese XP machine
I also want to type text in japanese with some Japanese fonts
Any help in this will be great
Thanks
Pramod
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take a look this maybe is same and for Japanese characters
http://www.c-sharpcorner.com/Code/2002/Jan/MultilingualSupportKS006.asp
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Thanks
but i am already working on a Japanese XP machine,
Hope for some more help
Pramod
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I'm in one class and would like to use a string that was defined in another class. Ho to...
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Is the string a static member or instance member? A static member can be referenced without object references like
MessageBox.Show(ClassWithString.MyString);
If it's an instance member, you have to create an instance and then refer to it like
ClassWithString cws = new ClassWithString();
MessageBox.Show(cws.MyString);
Of course, I'm assuming that ClassWithString is accessible from your code and that the string is public. HTH. 
Cheers,
Vikram.
"When I read in books about a "base class", I figured this was the class that was at the bottom of the inheritence tree. It's the "base", right? Like the base of a pyramid." - Marc Clifton.
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Here is an article on passing values between forms[^] (Remembering that a Form is just another type of class)
My: Blog | Photos
"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucius
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Hi all,
I have devloped a Remote Managment App. where server captures the
updated regions of its screen and sends to client.
Problem is that server captures the area which is updated and then
sends. Updation is so frequent and so quick if i will try to send
all the updates as they occur then i think evrything will stop.
So i stores the updates info into a queue and then get them one by one
and sends to client. It looks all will be fine but after some data
tranfer my client stops receiving data. Why i dont know?
What protocol i have to use to make my session a reiable one and
to minimize memory usage by removing intermediate queue?
Thanx
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The protocol probably isnt the problem. You may be overloading the receive buffer of the client so that it stops accepting data, or any number of other problems. You may want to send black and white only with your remote management, especially if you are currently using 24 or 32 bit colors. With black and white 1 byte can represent 8 pixels and will go MUCH faster than having to transmit 4 bytes for each pixel. There is a HUGE number of things that could be happening, but I doubt the protocol you are using is a large part of it.
C#Guy
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A couple things, since your monitor application is busy screen scraping choosing a protocol that is reliable is probably the best choice. In other words, TCP over UDP. The reason is with UDP, datagrams can be dropped, duplicated, or sent out of sequence. The latter does not bode well for a monitor client. Sure you could build in a retry and sequence mechanism but why? TCP will do that for you.
So now you have to further decide to proceed with managing the I/O. For one, having a real-time expectation may be a tad unrealistic. You will probably have to back off your update interval to a few seconds. At the minimum make it a tunable paremeter so that you can see performance on the fly.
The other huge consideration is what is your I/O model? If you app is already multi-threaded then you will probably want to use one new thread to scrape and enqueue or scrape and send. If you choose to buffer between the screen scrape and the actual send, make sure you use a AutoResetEvent or Mutex to signal the Send Thread it is time to send (i.e. updates are in queue).
If you architecture is asynchronous then you absolutley need to make sure your TCP I/O is also asynchronous. In other words use a non-blocking socket and use Begin/End for connect/accept, send/recv operations.
Mike Luster
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