Travelling around pixels c# -


i want travel around black pixel (inmasca1) until finds pixel different black. want search on row , column, not diagonally. after colored pixel in finded, assign black 1 colour. tried till now.

    private bool inmasca1(color col)      {         return col.r == 0 || col.g == 0 || col.b == 0;     }       bitmap b = (bitmap)picturebox1.image;            (int = 0; < b.width - 1; i++)       {            (int j = 0; j < b.height - 1; j++)            {                     nou = b.getpixel(i, j);               if (inmasca1(nou))               {                   (int l = 0; l < j; l++)                   {                        if (!inmasca1(b.getpixel(i, j + l)))                        {                             z0 = j + l;                             break;                        }                        else                        {                             if (!inmasca1(b.getpixel(i, j - l)))                             {                                  z0 = j - l;                                  break;                             }                         }                 }                   (int m = 0; m < i; m++)                  {                       if (!inmasca1(b.getpixel(i + m, j)))                       {                            t0 = + m;                            break;                       }                            else                            {                                if (!inmasca1(b.getpixel(i - m, j)))                                {                                    t0 = - m;                                    break;                                }                            }                       }

how can assign black pixel color of closest pixel different black?


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