Computer Vision image viewer code program

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in C# write the output of an image value (pixel value) at the track mouse position, also showing x coordinate and y coordinate? in computer vision. See this code below:

C#

private void OnMouseMoved ( object sender, MouseEventArgs e ) {
            //throw new Exception( "The method or operation is not implemented." );
            mMouseMoveValid = true;
            mMouseX = e.X;
            mMouseY = e.Y;
            Invalidate();
        }

So, what I need to do is modify this code to show also the output value of the image... it is something like for example : (143,213)= 230 which is x = 143, y = 213 and the image value at those coordinates is 230 pixel value.

Thank you

Posted 21-Feb-12 16:46pm

Khaledc419

Updated 21-Feb-12 20:46pm

lukeer

v5

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Khaledc419 21-Feb-12 23:06pm

Thank you for your answer, but this code below may help to understand my questions better:

private void OnMouseMoved ( object sender, MouseEventArgs e ) {
//throw new Exception( "The method or operation is not implemented." );
mMouseMoveValid = true;
mMouseX = e.X;
mMouseY = e.Y;
Invalidate();
}

So, what I need to do is modify this code to show also the output value of the image... it is something like for example : (143,213)= 230 which is x = 143, y = 213 and the image value at those coordinates is 230 pixel value.

Thank you for trying

krumia 21-Feb-12 23:51pm

Is this (http://www.codeproject.com/Questions/333731/Computer-Vision-image-code-program) the same questions?

2 solutions

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Ganesan Senthilvel · Answer 1 · 2012-02-21T16:56:00

Solution 1

Below JQuery will resolve

JavaScript

$("body").mousemove(function(e) {
    document.Form1.posx.value = e.pageX;
    document.Form1.posx.value = e.pageY;
})

Posted 21-Feb-12 16:56pm

Ganesan Senthilvel

lukeer · Answer 2 · 2012-02-21T20:46:00

I read your question as "I need to get the colour value at the mouse position."

You can use Bitmap.GetPixel()[^].

But there are several drawbacks to that.
1. You need a bitmap image you can call the method on. Maybe that's not a problem but in your code sample there is nothing that points to where the OnMouseMoved event comes from, especially since Control.OnMouseMove[^] doesn't have a "d" at its end.

2. It is a rather slow operation. However, since it's used in a user-induced event, this may not hurt too much (Users are even slower than slow operations).