[Resize Layer]

can you resize each layer of an image independently?

[Polygonal selection]

I suggest a polygonal selection feature.

[Color Picker Image Coordinate]

I think the color picker tool should also display the coordinates of the pixel being picked.

[Toon Filter]

you can get a pencil sketch kind of effect.

intensity of the filter is controlled by the size of the filter kernel matrix, bigger matrix = higher intensity.

[Toon Filter]

 

Download

 

Just unzip this file and save the dll file in your /Program Files/Paint.NET/Effects folder.

 

 

Code Lab Code

Spoiler

// filter kernel

const int size = 5; // odd number


//play around with the matrix for interesting effects.

int[,] conv = new int[size, size]
{
    {-1,  -1,  -1,  -1, -1},
    {-1,  -1,  -1,  -1, -1},
    {-1,  -1,  30,  -1, -1},
    {-1,  -1,  -1,  -1, -1},
    {-1,  -1,  -5,  -1, -1},
};

unsafe void Render(Surface dst, Surface src, Rectangle rect)
{
    int radius = (size-1)/2;
    for(int y = rect.Top; y < rect.Bottom; y++)
    {
        int top = y - radius, bottom = y + radius;
        if (top < 0) top = 0;
        if (bottom >= dst.Height) bottom = dst.Height - 1;
        for (int x = rect.Left; x < rect.Right; x++)
        {
            int left = x - radius, right = x + radius;
            int c = 0, s = 0, r = 0, g = 0, b = 0;
            if (left < 0) left = 0;
            if (right >= dst.Width) right = dst.Width - 1;
            for (int v = top; v <= bottom; v++)
            {
                ColorBgra *pRow = src.GetRowAddressUnchecked(v);
                int j = v - y + radius;

                for (int u = left; u <= right; u++)
                {
                    int i = u - x + radius;
                    int w = conv[i, j];
                    ColorBgra *pRef = pRow + u;
                    r += pRef->R * w;
                    g += pRef->G * w;
                    b += pRef->B * w;
                    s += w;
                    c++;
                }
            }
            dst[x, y] = ColorBgra.FromBgr(
                Int32Util.ClampToByte(b),
                Int32Util.ClampToByte(g),
                Int32Util.ClampToByte(r));
        }
    }
}

 

 

 

[API Documentation]

You can use Ndoc to automatically generate the API documentation from the source code.

http://ndoc.sourceforge.net/

or Doxygen http://www.stack.nl/~dimitri/doxygen/do ... #latestsrc

[How make redeye reduction take?]

click OK button

[How to antialias edges when rotating images]

you can try apply a bilinear filter if you want to smooth the jaggies.

[Intelligent Scissor]

like this

http://www.jaist.ac.jp/~h-yabu/cgi-bin/ ... gent%2Ezip

[Intelligent Scissor]

basically smart cut and paste

http://www.cs.toronto.edu/~faisal/teach ... -SIG95.pdf

[Intelligent Scissor]

Do you plan to add Intelligent Scissor to paint.net in the future?

[Save Image As True Grayscale IMage]

Is it possible to save a image as a true grayscale image(only have 1 intensity channel, instead of 3 R, G, B channels)?

[Color Image to Grayscale]

how can you convert a colorimage into a grayscale image?