I want set of totally distinct shades of QCOlor around 64



  • I want set of totally distinct shades of QCOlor around 64

    is there any standard set of such colors



  • Basically such distinct that ot should repeat the sheds of green for example


  • Moderators

    @Qt-Enthusiast Don't know how others see it but I really don't understand what you're asking for? Maybe you have a picture showing what you want to have?



  • If you the see the color pallete in
    https://www.google.co.in/search?q=qcolordialog+color+palette&tbm=isch&imgil=_CijNvFuIaiO2M%3A%3B64sw8dEU0PjblM%3Bhttp%253A%252F%252Fdoc.qt.io%252Fqt-5%252Fqcolordialog.html&source=iu&pf=m&fir=CijNvFuIaiO2M%253A%252C64sw8dEU0PjblM%252C&usg=__somCqlmBGeVEFzF6xDyE6ABPRUY%3D&biw=1522&bih=810&ved=0ahUKEwjH1aeb7KvVAhWCFJQKHVaPANYQyjcIQA&ei=ORx7WYfVFIKp0ATWnoKwDQ#imgrc=_CijNvFuIaiO2M:
    then the colors are not distinct .

    I want a distincy colors in this pallete



  • @qtEnthusiast
    Hi,
    Do you want to use different shades of color. Then based on hex value of color, hex value can be set to QColor and can be used.
    link text



  • No I want a algorithm that gives me different set of colors very different something like this
    https://stackoverflow.com/questions/2328339/how-to-generate-n-different-colors-for-any-natural-number-n


  • Qt Champions 2017

    Convert the rectangular RGB space into a spherical one and introduce a metric (if you want), then pick the colors from splitting the unit sphere into a number of parallels and meridians. At least that's what I'd do. The math isn't that complicated you can pull the formulas from wikipedia to try and wrap something up.



  • @kshegunov

    Is it possible to provide the code



  • some pseudo code of rectangles will be done


  • Qt Champions 2017

    @Qt-Enthusiast said in I want set of totally distinct shades of QCOlor around 64:

    @kshegunov

    Is it possible to provide the code

    Not really, I haven't any code, as I haven't done anything of that sort. It's only an idea you could explore.


  • Qt Champions 2017

    alt text



  • what algortimhs generates this


  • Qt Champions 2017

    @Qt-Enthusiast
    I think its a dictionary.
    Make a small test program. there is also a table of hex values to use. sample the color from the bitmap. (same offset so not so complex)
    Then alter properties (QColor) to fine tune.
    http://godsnotwheregodsnot.blogspot.dk/2013/11/kmeans-color-quantization-seeding.html
    Kmeans++ Color Quantization seeding it seems :)
    From
    https://graphicdesign.stackexchange.com/questions/3682/where-can-i-find-a-large-palette-set-of-contrasting-colors-for-coloring-many-d


  • Qt Champions 2017

    Hi
    Using his table, and some ligher() and darker() calls then they seems pretty distinct ;)

    alt text

    #include "mainwindow.h"
    #include "ui_mainwindow.h"
    #include <QPainter>
    
    MainWindow::MainWindow(QWidget* parent) :
      QMainWindow(parent),
      ui(new Ui::MainWindow) {
      ui->setupUi(this);
    }
    
    MainWindow::~MainWindow() {
      delete ui;
    }
    
    const char* indexcolors[] = {
      "#000000", "#FFFF00", "#1CE6FF", "#FF34FF", "#FF4A46", "#008941", "#006FA6", "#A30059",
      "#FFDBE5", "#7A4900", "#0000A6", "#63FFAC", "#B79762", "#004D43", "#8FB0FF", "#997D87",
      "#5A0007", "#809693", "#FEFFE6", "#1B4400", "#4FC601", "#3B5DFF", "#4A3B53", "#FF2F80",
      "#61615A", "#BA0900", "#6B7900", "#00C2A0", "#FFAA92", "#FF90C9", "#B903AA", "#D16100",
      "#DDEFFF", "#000035", "#7B4F4B", "#A1C299", "#300018", "#0AA6D8", "#013349", "#00846F",
      "#372101", "#FFB500", "#C2FFED", "#A079BF", "#CC0744", "#C0B9B2", "#C2FF99", "#001E09",
      "#00489C", "#6F0062", "#0CBD66", "#EEC3FF", "#456D75", "#B77B68", "#7A87A1", "#788D66",
      "#885578", "#FAD09F", "#FF8A9A", "#D157A0", "#BEC459", "#456648", "#0086ED", "#886F4C",
    
      "#34362D", "#B4A8BD", "#00A6AA", "#452C2C", "#636375", "#A3C8C9", "#FF913F", "#938A81",
      "#575329", "#00FECF", "#B05B6F", "#8CD0FF", "#3B9700", "#04F757", "#C8A1A1", "#1E6E00",
      "#7900D7", "#A77500", "#6367A9", "#A05837", "#6B002C", "#772600", "#D790FF", "#9B9700",
      "#549E79", "#FFF69F", "#201625", "#72418F", "#BC23FF", "#99ADC0", "#3A2465", "#922329",
      "#5B4534", "#FDE8DC", "#404E55", "#0089A3", "#CB7E98", "#A4E804", "#324E72", "#6A3A4C",
      "#83AB58", "#001C1E", "#D1F7CE", "#004B28", "#C8D0F6", "#A3A489", "#806C66", "#222800",
      "#BF5650", "#E83000", "#66796D", "#DA007C", "#FF1A59", "#8ADBB4", "#1E0200", "#5B4E51",
      "#C895C5", "#320033", "#FF6832", "#66E1D3", "#CFCDAC", "#D0AC94", "#7ED379", "#012C58",
    
      "#7A7BFF", "#D68E01", "#353339", "#78AFA1", "#FEB2C6", "#75797C", "#837393", "#943A4D",
      "#B5F4FF", "#D2DCD5", "#9556BD", "#6A714A", "#001325", "#02525F", "#0AA3F7", "#E98176",
      "#DBD5DD", "#5EBCD1", "#3D4F44", "#7E6405", "#02684E", "#962B75", "#8D8546", "#9695C5",
      "#E773CE", "#D86A78", "#3E89BE", "#CA834E", "#518A87", "#5B113C", "#55813B", "#E704C4",
      "#00005F", "#A97399", "#4B8160", "#59738A", "#FF5DA7", "#F7C9BF", "#643127", "#513A01",
      "#6B94AA", "#51A058", "#A45B02", "#1D1702", "#E20027", "#E7AB63", "#4C6001", "#9C6966",
      "#64547B", "#97979E", "#006A66", "#391406", "#F4D749", "#0045D2", "#006C31", "#DDB6D0",
      "#7C6571", "#9FB2A4", "#00D891", "#15A08A", "#BC65E9", "#FFFFFE", "#C6DC99", "#203B3C",
    
      "#671190", "#6B3A64", "#F5E1FF", "#FFA0F2", "#CCAA35", "#374527", "#8BB400", "#797868",
      "#C6005A", "#3B000A", "#C86240", "#29607C", "#402334", "#7D5A44", "#CCB87C", "#B88183",
      "#AA5199", "#B5D6C3", "#A38469", "#9F94F0", "#A74571", "#B894A6", "#71BB8C", "#00B433",
      "#789EC9", "#6D80BA", "#953F00", "#5EFF03", "#E4FFFC", "#1BE177", "#BCB1E5", "#76912F",
      "#003109", "#0060CD", "#D20096", "#895563", "#29201D", "#5B3213", "#A76F42", "#89412E",
      "#1A3A2A", "#494B5A", "#A88C85", "#F4ABAA", "#A3F3AB", "#00C6C8", "#EA8B66", "#958A9F",
      "#BDC9D2", "#9FA064", "#BE4700", "#658188", "#83A485", "#453C23", "#47675D", "#3A3F00",
      "#061203", "#DFFB71", "#868E7E", "#98D058", "#6C8F7D", "#D7BFC2", "#3C3E6E", "#D83D66",
    
      "#2F5D9B", "#6C5E46", "#D25B88", "#5B656C", "#00B57F", "#545C46", "#866097", "#365D25",
      "#252F99", "#00CCFF", "#674E60", "#FC009C", "#92896B"
    };
    
    
    void MainWindow::on_pbGo_released() {
      const int tilesize = 32;
      const int mapsize = tilesize * 25 ;
      QPixmap pix(QSize(mapsize, mapsize));
      QPainter Painter;
    
      int maxCol = sizeof(indexcolors) / sizeof(indexcolors[0]);
      int cCol = 0;
      Painter.begin(&pix);
    
      Painter.setPen(QPen(QBrush(Qt::black), 1, Qt::SolidLine));
      int maxX = mapsize / tilesize;
      int dark = 0;
    
      for (int y = 0; y < maxX; ++y) {
        for (int x = 0; x < maxX; ++x) {
          QColor col(indexcolors[cCol]);
          if (cCol < maxCol) cCol++;
          else {
            cCol = 0;
            dark++;
          }
    
          if(dark == 1)
            col = col.darker();
          if(dark == 2)
            col = col.lighter();
    
          Painter.setBrush(QBrush(col) );
          Painter.drawRect((x * tilesize), (y * tilesize), tilesize, tilesize);
        }
      }   
      Painter.end();
     ui->labPic->setPixmap(pix);
    }
    
    


  • Can we generate the table with algorithm ?


  • Qt Champions 2017

    @Qt-Enthusiast

    Hi.
    I thinks it s made using color distance algorithm already.
    If you mean algorithm to generate all the colors out of nothing, then no.



  • Algorithm means code


  • Qt Champions 2017

    @Qt-Enthusiast

    the colors are already code. ?



  • Means a pseudo code that generates this table


  • Qt Champions 2017

    @Qt-Enthusiast
    Nope. Not that i have seen.


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