Problem With Image Brightness

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hi all

My program extracting features from a colored image
but my code extract specified range (R,G,B) of a color
i have a problem when i test the program in a real time
the problem about Brightness
the brightness of the time of capturing the image
change colors so it be out of my code range of color
I need a help about how i get over this problem by a pre-processing

Note : if i make the range long more unwanted colors will extracted

Posted 16-May-12 7:50am

AmrKhalid

Updated 16-May-12 7:52am

v2

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Sergey Alexandrovich Kryukov 16-May-12 13:58pm

The problem is not clear. Any code?
--SA

2 solutions

Solution 1

You probably need to convert your image into another color space, like HSL or HSB for example. So your can treat brightness as a component of the vector.
Start from this article, it contains a complete c# code.
To understand color spaces read this, or google for it.

Posted 16-May-12 9:36am

Zoltán Zörgő

Updated 16-May-12 9:52am

v4

Comments

AmrKhalid 16-May-12 17:48pm

Thank you For Answer Zoltán Zörgő

I Used The Brightness filter in AForge
It is very useful

private void button1_Click(object sender, EventArgs e)
{
ApplyFilter(new BrightnessCorrection() , image1);
}

private void ApplyFilter(IFilter filter , Bitmap x)
{

x = filter.Apply(x);
// display filtered image
pictureBox2.Image = x;
}

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AmrKhalid · Accepted Answer · 2012-05-16T10:47:00

Thank you For Answer Zoltán Zörgő

I Used The Brightness filter in AForge
It is very useful

C#

private void button1_Click(object sender, EventArgs e)
        {
          ApplyFilter(new BrightnessCorrection() , image1);
        }


private void ApplyFilter(IFilter filter , Bitmap x)
        {
            
            x = filter.Apply(x);
            // display filtered image
            pictureBox2.Image = x;
        }