Code problem - Listing colors in image

[TechnoRobbo]

43 colors is a Cakewalk , 16 million colors is a quagmire.

 

If you do feel the need to process more than 43 colors heres a simple solution:

 

Since random is psuedo random. Simply Seed the Random generator with the color in question and all the ROI's are in sync.

 

I replace the reseed button (0 - 255) with a 0 - 32767 for more variations.

 

This will give you the speed of Multithreading and the palette consistency

#region UICode
int Amount1 = 25; // [0,100] Hue Adjust
int Amount2 = 10; // [0,100] Saturation Adjust
int Amount3 = 10; // [0,100] Value Adjust
int Amount4 = 3; // [0,32767] Reseed
#endregion


object sync = new object();

void Render(Surface dst, Surface src, Rectangle rect)
{
    
    bool match = false;
    int colorIdx = 0;
    Color[] colors = new Color[rect.Width * rect.Height];
    Color[] off_colors = new Color[rect.Width * rect.Height];
    ColorBgra CurrentPixel;
    
    //populate colors
    for (int y = rect.Top; y < rect.Bottom; y++)
    {
        for (int x = rect.Left; x < rect.Right; x++)
        {
            CurrentPixel = src[x,y];
            bool nomatch=true;
            for (int i = 0; i < colorIdx; i++)
            {          
                if (CurrentPixel.ToColor().Equals(colors[i])){
                    nomatch=false;
                    dst[x,y]= ColorBgra.FromColor(off_colors[i]);
			        break;
                }

            }
            if (nomatch){

                colors[colorIdx] = CurrentPixel.ToColor();
                Random rndm = new Random(CurrentPixel.GetHashCode()+ Amount4);
                HsvColor hsv;
                int H = 0, S = 0, V = 0;
               
                hsv = HsvColor.FromColor(colors[colorIdx]);
                            
                H = hsv.Hue;
                S = hsv.Saturation;
                V = hsv.Value;
                            
                H -= rndm.Next(Amount1 * 180 / 100);
                H += rndm.Next(Amount1 * 180 / 100);
                            
                S -= rndm.Next(Amount2) / 2;
                S += rndm.Next(Amount2) / 2;
                            
                V -= rndm.Next(Amount3) / 2;
                V += rndm.Next(Amount3) / 2;
                            
                if (H < 0) H = 0;
                if (H > 360) H = 360;
                        
                if (S < 0) S = 0;
                if (S > 100) S = 100;
                            
                if (V < 0) V = 0;
                if (V > 100) V = 100;
                            
                hsv = new HsvColor(H,S,V);
                        
                off_colors[colorIdx]=hsv.ToColor();
                dst[x,y]= ColorBgra.FromColor(off_colors[colorIdx]);

                colorIdx++;
            }
        }
    }
}

Edited December 22, 2013 by TechnoRobbo

[Felix The Ghost]

 

Since random is Psuedo Random Simply Seed the Random generator with the color in question and all the ROI's are in sync.

 

Very clever!

 

I see you got it to respect selections too!

 

I still don't know what you use

object sync = new object();

for in the code though.

 

I also like the reseed button but I can probably figure that out. I thought I posted this but I guess I closed the browser before posting.

[TechnoRobbo]

 

I still don't know what you use

object sync = new object();

for in the code though.

I forgot to erase it

 

 

 

I also like the reseed button but I can probably figure that out. I thought I posted this but I guess I closed the browser before posting.

reseed button cycles from 0 to 255 as you click on it- it will work too but the sliders will give you more combination (0 - 32767)

 

Post Edit:

 

I was just playing around with it -Kudos man, this is a cool concept!!!

 

I'm removing it from my machine and I will wait for your plugin.

Edited December 22, 2013 by TechnoRobbo

[Felix The Ghost]

I'll have to see how others have posted plugins but I should have it out within a few days when I have more free time.

I very much appreciate the help

[Rick Brewster]

In paint.net 4.0 you can also make use of PaintDotNet.RandomUtil.ThreadInstance. It's already initialized with a good seed which is thread- and time-dependent. You also won't end up with 2 threads using the same seed, which is important.