|
I have an Image taken from Camera . Using Aforge.net , i have filtered the image and got the 2d coordinate of the circle in the picture. Now i want to make a real world image and get the co-ordinate of the circle in the real world (3d coordinate) with reference to the camera location.
How can i get it.. please help...
|
|
|
|
|
|
With a circle I think it is not possible. Imagine you're looking straight from the front at the circle, then there is no way to tell the camera's rotation, as the circle is symmetric!
|
|
|
|
|
TomasRiker2 wrote: With a circle I think it is not possible. Imagine you're looking straight from the front at the circle, then there is no way to tell the camera's rotation, as the circle is symmetric!
The OP is asking for the 3D co-ordinates of the center of the circle not rotation angle.
“Be at war with your vices, at peace with your neighbors, and let every new year find you a better man or woman.”
|
|
|
|
|
Try OpenCV. It's a really easy to use, and powerful library for C++.
|
|
|
|
|
I am wondering, why dont we use humidity, temperature to create new random number?
|
|
|
|
|
Was tried before...
Humidity - shorts out your keyboard
Temperature - over heats your keyboard
|
|
|
|
|
because it's easy to control the humidity and temperature in a closed environment.
|
|
|
|
|
But its a true fact that humidity and temperature are controlled in some environment
|
|
|
|
|
right. that was my point. if it's controllable, then someone can duplicate the inputs which generated a series of values.
|
|
|
|
|
It wouldn't be random because humidity and temperature follow patterns. E.g. they both vary continuously; they don't "jump".
"Microsoft -- Adding unnecessary complexity to your work since 1987!"
|
|
|
|
|
So what? Any useful hash function applied to them will provide the "jumps".
|
|
|
|
|
So what does the hash function do when the temperature zig-zags over the same fractions of a degree, at the limit of the thermometer's resolution? It repeats numbers more than you'd expect by chance.
It might be possible to overcome this limitation by incorporating state into the function, i.e. using the history of values in the calculation so you get different output for repeated inputs.
"Microsoft -- Adding unnecessary complexity to your work since 1987!"
|
|
|
|
|
So, still we can use environment parameter to generate random numbers....
|
|
|
|
|
In short, because there are better environmental sources of randomness.
|
|
|
|
|
BobJanova wrote: there are better environmental sources of randomness.
Care to give some better alternatives? Just curious.
Signature construction in progress. Sorry for the inconvenience.
|
|
|
|
|
electronic noise?
Ciao,
luker
|
|
|
|
|
Thermal noise is a common one. Interval between photons on a light detector would work well if it was low enough intensity. Radioactive decay is a classic which you can use through a web service if you're connected to the Internet.
Intervals between discrete events are generally better, as a continuous variable will always have linkage between readings taken close together in time (i.e. if it's 15.264C now, a measurement taken next time round the loop is more more likely to be 15.263, 4 or 5 than it is any other value).
|
|
|
|
|
There is no such a thing as a random number in practice. I would Rather you use pseudo - random since whatever you use to generate your "random" number has a pattern unlike in theoretical mathematics. So temperature or humidity, like others have said, have certain patterns though complex but not random.
|
|
|
|
|
|
|
Because Intel has incorporated a high speed random number generator into the Ivy Bridge CPU architecture? It is called Bull Mountain.
|
|
|
|
|
|
i have 2 aspx page
1st page one drop down list 1 text box
textbox visible ="false"
drop down list 2 value , if i select 1st value it goes to 2nd page . if i select 2nd value, text box should be visible..
in my 2nd aspx page only one drop down list . if i select one value it goes to first page .. i did until this
now if i select 2nd page drop down list value , it goes first page and textbox should be visible ..
can any 1 help me pls ?
my coding :
first page:
script type="text/javascript">
function goto1(str) {
if (str =="http://www.contactus.aspx")
{
window.location = str;
}
else if (str == "Corporate") {
document.getElementById("txtdesignation").style.display = "block";
}
}
<asp:dropdownlist id=""DropDownList1"" runat=""server"" onchange=""goto1(this.value)"" height=""22px">
" <asp:listitem="" text=""Select"" value="""></asp:listitem>
" ><="" asp:listitem>
="" <="" asp:dropdownlist><="" pre="">
<asp:textbox ID="txtdesignation" style="display:none "
runat="server" Height="22px" />
2nd page only one drop down list:
|
|
|
|
|
1. Format your code blocks properly.
2. Post your question in the appropriate forum.
Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman
|
|
|
|