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  4. I want set of totally distinct shades of QCOlor around 64

I want set of totally distinct shades of QCOlor around 64

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  • Q Offline
    Q Offline
    Qt Enthusiast
    wrote on last edited by
    #1

    I want set of totally distinct shades of QCOlor around 64

    is there any standard set of such colors

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    0
    • Q Offline
      Q Offline
      Qt Enthusiast
      wrote on last edited by
      #2

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

      jsulmJ 1 Reply Last reply
      0
      • Q Qt Enthusiast

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

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #3

        @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?

        https://forum.qt.io/topic/113070/qt-code-of-conduct

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        • Q Offline
          Q Offline
          Qt Enthusiast
          wrote on last edited by
          #4

          If you the see the color pallete in
          https://www.google.co.in/search?q=qcolordialog+color+palette&tbm=isch&imgil=_CijNvFuIaiO2M%253A%253B64sw8dEU0PjblM%253Bhttp%25253A%25252F%25252Fdoc.qt.io%25252Fqt-5%25252Fqcolordialog.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

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          0
          • yuvaramY Offline
            yuvaramY Offline
            yuvaram
            wrote on last edited by
            #5

            @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

            Yuvaram Aligeti
            Embedded Qt Developer
            : )

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            1
            • Q Offline
              Q Offline
              Qt Enthusiast
              wrote on last edited by Qt Enthusiast
              #6

              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

              kshegunovK 1 Reply Last reply
              0
              • Q Qt Enthusiast

                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

                kshegunovK Offline
                kshegunovK Offline
                kshegunov
                Moderators
                wrote on last edited by kshegunov
                #7

                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.

                Read and abide by the Qt Code of Conduct

                Q 1 Reply Last reply
                2
                • kshegunovK kshegunov

                  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.

                  Q Offline
                  Q Offline
                  Qt Enthusiast
                  wrote on last edited by
                  #8

                  @kshegunov

                  Is it possible to provide the code

                  kshegunovK 1 Reply Last reply
                  0
                  • Q Offline
                    Q Offline
                    Qt Enthusiast
                    wrote on last edited by
                    #9

                    some pseudo code of rectangles will be done

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                    0
                    • Q Qt Enthusiast

                      @kshegunov

                      Is it possible to provide the code

                      kshegunovK Offline
                      kshegunovK Offline
                      kshegunov
                      Moderators
                      wrote on last edited by
                      #10

                      @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.

                      Read and abide by the Qt Code of Conduct

                      1 Reply Last reply
                      0
                      • mrjjM Offline
                        mrjjM Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on last edited by
                        #11

                        alt text

                        1 Reply Last reply
                        0
                        • Q Offline
                          Q Offline
                          Qt Enthusiast
                          wrote on last edited by
                          #12

                          what algortimhs generates this

                          mrjjM 1 Reply Last reply
                          0
                          • Q Qt Enthusiast

                            what algortimhs generates this

                            mrjjM Offline
                            mrjjM Offline
                            mrjj
                            Lifetime Qt Champion
                            wrote on last edited by mrjj
                            #13

                            @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

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                            1
                            • mrjjM Offline
                              mrjjM Offline
                              mrjj
                              Lifetime Qt Champion
                              wrote on last edited by mrjj
                              #14

                              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);
                              }
                              
                              
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                              • Q Offline
                                Q Offline
                                Qt Enthusiast
                                wrote on last edited by
                                #15

                                Can we generate the table with algorithm ?

                                mrjjM 1 Reply Last reply
                                0
                                • Q Qt Enthusiast

                                  Can we generate the table with algorithm ?

                                  mrjjM Offline
                                  mrjjM Offline
                                  mrjj
                                  Lifetime Qt Champion
                                  wrote on last edited by mrjj
                                  #16

                                  @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.

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                                  0
                                  • Q Offline
                                    Q Offline
                                    Qt Enthusiast
                                    wrote on last edited by
                                    #17

                                    Algorithm means code

                                    mrjjM 1 Reply Last reply
                                    0
                                    • Q Qt Enthusiast

                                      Algorithm means code

                                      mrjjM Offline
                                      mrjjM Offline
                                      mrjj
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #18

                                      @Qt-Enthusiast

                                      the colors are already code. ?

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                                      0
                                      • Q Offline
                                        Q Offline
                                        Qt Enthusiast
                                        wrote on last edited by
                                        #19

                                        Means a pseudo code that generates this table

                                        mrjjM 1 Reply Last reply
                                        0
                                        • Q Qt Enthusiast

                                          Means a pseudo code that generates this table

                                          mrjjM Offline
                                          mrjjM Offline
                                          mrjj
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #20

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

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