Convertir les valeurs RVB en nom de couleur
Comment puis-je convertir une couleur au format RVB en un nom de couleur?
Exemples:
- (0, 0, 255) -> "bleu"
- (255, 0, 0) -> "rouge"
- (128, 128, 128) -> "gris"
18
7 answers
- Remplir une liste de couleurs "connues".
-
Pour chaque couleur connue:
rgbDistance = Math.abs(myColor.getRed() - colorI.getRed() + Math.abs(myColor.getGreen() - colorI.getGreen()) + Math.abs(myColor.getBlue() - colorI.getBlue()) Renvoie le nom de
colorIpour lequelrgbDistanceétait le plus petit.
10
Author: Ivan, 2015-02-02 13:16:28
Voici un exemple de code de travail qui fait cela. Il convertit une couleur rvb / hex / awt en le nom de couleur le plus proche.
import java.awt.Color;
import java.util.ArrayList;
/**
* Java Code to get a color name from rgb/hex value/awt color
*
* The part of looking up a color name from the rgb values is edited from
* https://gist.github.com/nightlark/6482130#file-gistfile1-java (that has some errors) by Ryan Mast (nightlark)
*
* @author Xiaoxiao Li
*
*/
public class ColorUtils {
/**
* Initialize the color list that we have.
*/
private ArrayList<ColorName> initColorList() {
ArrayList<ColorName> colorList = new ArrayList<ColorName>();
colorList.add(new ColorName("AliceBlue", 0xF0, 0xF8, 0xFF));
colorList.add(new ColorName("AntiqueWhite", 0xFA, 0xEB, 0xD7));
colorList.add(new ColorName("Aqua", 0x00, 0xFF, 0xFF));
colorList.add(new ColorName("Aquamarine", 0x7F, 0xFF, 0xD4));
colorList.add(new ColorName("Azure", 0xF0, 0xFF, 0xFF));
colorList.add(new ColorName("Beige", 0xF5, 0xF5, 0xDC));
colorList.add(new ColorName("Bisque", 0xFF, 0xE4, 0xC4));
colorList.add(new ColorName("Black", 0x00, 0x00, 0x00));
colorList.add(new ColorName("BlanchedAlmond", 0xFF, 0xEB, 0xCD));
colorList.add(new ColorName("Blue", 0x00, 0x00, 0xFF));
colorList.add(new ColorName("BlueViolet", 0x8A, 0x2B, 0xE2));
colorList.add(new ColorName("Brown", 0xA5, 0x2A, 0x2A));
colorList.add(new ColorName("BurlyWood", 0xDE, 0xB8, 0x87));
colorList.add(new ColorName("CadetBlue", 0x5F, 0x9E, 0xA0));
colorList.add(new ColorName("Chartreuse", 0x7F, 0xFF, 0x00));
colorList.add(new ColorName("Chocolate", 0xD2, 0x69, 0x1E));
colorList.add(new ColorName("Coral", 0xFF, 0x7F, 0x50));
colorList.add(new ColorName("CornflowerBlue", 0x64, 0x95, 0xED));
colorList.add(new ColorName("Cornsilk", 0xFF, 0xF8, 0xDC));
colorList.add(new ColorName("Crimson", 0xDC, 0x14, 0x3C));
colorList.add(new ColorName("Cyan", 0x00, 0xFF, 0xFF));
colorList.add(new ColorName("DarkBlue", 0x00, 0x00, 0x8B));
colorList.add(new ColorName("DarkCyan", 0x00, 0x8B, 0x8B));
colorList.add(new ColorName("DarkGoldenRod", 0xB8, 0x86, 0x0B));
colorList.add(new ColorName("DarkGray", 0xA9, 0xA9, 0xA9));
colorList.add(new ColorName("DarkGreen", 0x00, 0x64, 0x00));
colorList.add(new ColorName("DarkKhaki", 0xBD, 0xB7, 0x6B));
colorList.add(new ColorName("DarkMagenta", 0x8B, 0x00, 0x8B));
colorList.add(new ColorName("DarkOliveGreen", 0x55, 0x6B, 0x2F));
colorList.add(new ColorName("DarkOrange", 0xFF, 0x8C, 0x00));
colorList.add(new ColorName("DarkOrchid", 0x99, 0x32, 0xCC));
colorList.add(new ColorName("DarkRed", 0x8B, 0x00, 0x00));
colorList.add(new ColorName("DarkSalmon", 0xE9, 0x96, 0x7A));
colorList.add(new ColorName("DarkSeaGreen", 0x8F, 0xBC, 0x8F));
colorList.add(new ColorName("DarkSlateBlue", 0x48, 0x3D, 0x8B));
colorList.add(new ColorName("DarkSlateGray", 0x2F, 0x4F, 0x4F));
colorList.add(new ColorName("DarkTurquoise", 0x00, 0xCE, 0xD1));
colorList.add(new ColorName("DarkViolet", 0x94, 0x00, 0xD3));
colorList.add(new ColorName("DeepPink", 0xFF, 0x14, 0x93));
colorList.add(new ColorName("DeepSkyBlue", 0x00, 0xBF, 0xFF));
colorList.add(new ColorName("DimGray", 0x69, 0x69, 0x69));
colorList.add(new ColorName("DodgerBlue", 0x1E, 0x90, 0xFF));
colorList.add(new ColorName("FireBrick", 0xB2, 0x22, 0x22));
colorList.add(new ColorName("FloralWhite", 0xFF, 0xFA, 0xF0));
colorList.add(new ColorName("ForestGreen", 0x22, 0x8B, 0x22));
colorList.add(new ColorName("Fuchsia", 0xFF, 0x00, 0xFF));
colorList.add(new ColorName("Gainsboro", 0xDC, 0xDC, 0xDC));
colorList.add(new ColorName("GhostWhite", 0xF8, 0xF8, 0xFF));
colorList.add(new ColorName("Gold", 0xFF, 0xD7, 0x00));
colorList.add(new ColorName("GoldenRod", 0xDA, 0xA5, 0x20));
colorList.add(new ColorName("Gray", 0x80, 0x80, 0x80));
colorList.add(new ColorName("Green", 0x00, 0x80, 0x00));
colorList.add(new ColorName("GreenYellow", 0xAD, 0xFF, 0x2F));
colorList.add(new ColorName("HoneyDew", 0xF0, 0xFF, 0xF0));
colorList.add(new ColorName("HotPink", 0xFF, 0x69, 0xB4));
colorList.add(new ColorName("IndianRed", 0xCD, 0x5C, 0x5C));
colorList.add(new ColorName("Indigo", 0x4B, 0x00, 0x82));
colorList.add(new ColorName("Ivory", 0xFF, 0xFF, 0xF0));
colorList.add(new ColorName("Khaki", 0xF0, 0xE6, 0x8C));
colorList.add(new ColorName("Lavender", 0xE6, 0xE6, 0xFA));
colorList.add(new ColorName("LavenderBlush", 0xFF, 0xF0, 0xF5));
colorList.add(new ColorName("LawnGreen", 0x7C, 0xFC, 0x00));
colorList.add(new ColorName("LemonChiffon", 0xFF, 0xFA, 0xCD));
colorList.add(new ColorName("LightBlue", 0xAD, 0xD8, 0xE6));
colorList.add(new ColorName("LightCoral", 0xF0, 0x80, 0x80));
colorList.add(new ColorName("LightCyan", 0xE0, 0xFF, 0xFF));
colorList.add(new ColorName("LightGoldenRodYellow", 0xFA, 0xFA, 0xD2));
colorList.add(new ColorName("LightGray", 0xD3, 0xD3, 0xD3));
colorList.add(new ColorName("LightGreen", 0x90, 0xEE, 0x90));
colorList.add(new ColorName("LightPink", 0xFF, 0xB6, 0xC1));
colorList.add(new ColorName("LightSalmon", 0xFF, 0xA0, 0x7A));
colorList.add(new ColorName("LightSeaGreen", 0x20, 0xB2, 0xAA));
colorList.add(new ColorName("LightSkyBlue", 0x87, 0xCE, 0xFA));
colorList.add(new ColorName("LightSlateGray", 0x77, 0x88, 0x99));
colorList.add(new ColorName("LightSteelBlue", 0xB0, 0xC4, 0xDE));
colorList.add(new ColorName("LightYellow", 0xFF, 0xFF, 0xE0));
colorList.add(new ColorName("Lime", 0x00, 0xFF, 0x00));
colorList.add(new ColorName("LimeGreen", 0x32, 0xCD, 0x32));
colorList.add(new ColorName("Linen", 0xFA, 0xF0, 0xE6));
colorList.add(new ColorName("Magenta", 0xFF, 0x00, 0xFF));
colorList.add(new ColorName("Maroon", 0x80, 0x00, 0x00));
colorList.add(new ColorName("MediumAquaMarine", 0x66, 0xCD, 0xAA));
colorList.add(new ColorName("MediumBlue", 0x00, 0x00, 0xCD));
colorList.add(new ColorName("MediumOrchid", 0xBA, 0x55, 0xD3));
colorList.add(new ColorName("MediumPurple", 0x93, 0x70, 0xDB));
colorList.add(new ColorName("MediumSeaGreen", 0x3C, 0xB3, 0x71));
colorList.add(new ColorName("MediumSlateBlue", 0x7B, 0x68, 0xEE));
colorList.add(new ColorName("MediumSpringGreen", 0x00, 0xFA, 0x9A));
colorList.add(new ColorName("MediumTurquoise", 0x48, 0xD1, 0xCC));
colorList.add(new ColorName("MediumVioletRed", 0xC7, 0x15, 0x85));
colorList.add(new ColorName("MidnightBlue", 0x19, 0x19, 0x70));
colorList.add(new ColorName("MintCream", 0xF5, 0xFF, 0xFA));
colorList.add(new ColorName("MistyRose", 0xFF, 0xE4, 0xE1));
colorList.add(new ColorName("Moccasin", 0xFF, 0xE4, 0xB5));
colorList.add(new ColorName("NavajoWhite", 0xFF, 0xDE, 0xAD));
colorList.add(new ColorName("Navy", 0x00, 0x00, 0x80));
colorList.add(new ColorName("OldLace", 0xFD, 0xF5, 0xE6));
colorList.add(new ColorName("Olive", 0x80, 0x80, 0x00));
colorList.add(new ColorName("OliveDrab", 0x6B, 0x8E, 0x23));
colorList.add(new ColorName("Orange", 0xFF, 0xA5, 0x00));
colorList.add(new ColorName("OrangeRed", 0xFF, 0x45, 0x00));
colorList.add(new ColorName("Orchid", 0xDA, 0x70, 0xD6));
colorList.add(new ColorName("PaleGoldenRod", 0xEE, 0xE8, 0xAA));
colorList.add(new ColorName("PaleGreen", 0x98, 0xFB, 0x98));
colorList.add(new ColorName("PaleTurquoise", 0xAF, 0xEE, 0xEE));
colorList.add(new ColorName("PaleVioletRed", 0xDB, 0x70, 0x93));
colorList.add(new ColorName("PapayaWhip", 0xFF, 0xEF, 0xD5));
colorList.add(new ColorName("PeachPuff", 0xFF, 0xDA, 0xB9));
colorList.add(new ColorName("Peru", 0xCD, 0x85, 0x3F));
colorList.add(new ColorName("Pink", 0xFF, 0xC0, 0xCB));
colorList.add(new ColorName("Plum", 0xDD, 0xA0, 0xDD));
colorList.add(new ColorName("PowderBlue", 0xB0, 0xE0, 0xE6));
colorList.add(new ColorName("Purple", 0x80, 0x00, 0x80));
colorList.add(new ColorName("Red", 0xFF, 0x00, 0x00));
colorList.add(new ColorName("RosyBrown", 0xBC, 0x8F, 0x8F));
colorList.add(new ColorName("RoyalBlue", 0x41, 0x69, 0xE1));
colorList.add(new ColorName("SaddleBrown", 0x8B, 0x45, 0x13));
colorList.add(new ColorName("Salmon", 0xFA, 0x80, 0x72));
colorList.add(new ColorName("SandyBrown", 0xF4, 0xA4, 0x60));
colorList.add(new ColorName("SeaGreen", 0x2E, 0x8B, 0x57));
colorList.add(new ColorName("SeaShell", 0xFF, 0xF5, 0xEE));
colorList.add(new ColorName("Sienna", 0xA0, 0x52, 0x2D));
colorList.add(new ColorName("Silver", 0xC0, 0xC0, 0xC0));
colorList.add(new ColorName("SkyBlue", 0x87, 0xCE, 0xEB));
colorList.add(new ColorName("SlateBlue", 0x6A, 0x5A, 0xCD));
colorList.add(new ColorName("SlateGray", 0x70, 0x80, 0x90));
colorList.add(new ColorName("Snow", 0xFF, 0xFA, 0xFA));
colorList.add(new ColorName("SpringGreen", 0x00, 0xFF, 0x7F));
colorList.add(new ColorName("SteelBlue", 0x46, 0x82, 0xB4));
colorList.add(new ColorName("Tan", 0xD2, 0xB4, 0x8C));
colorList.add(new ColorName("Teal", 0x00, 0x80, 0x80));
colorList.add(new ColorName("Thistle", 0xD8, 0xBF, 0xD8));
colorList.add(new ColorName("Tomato", 0xFF, 0x63, 0x47));
colorList.add(new ColorName("Turquoise", 0x40, 0xE0, 0xD0));
colorList.add(new ColorName("Violet", 0xEE, 0x82, 0xEE));
colorList.add(new ColorName("Wheat", 0xF5, 0xDE, 0xB3));
colorList.add(new ColorName("White", 0xFF, 0xFF, 0xFF));
colorList.add(new ColorName("WhiteSmoke", 0xF5, 0xF5, 0xF5));
colorList.add(new ColorName("Yellow", 0xFF, 0xFF, 0x00));
colorList.add(new ColorName("YellowGreen", 0x9A, 0xCD, 0x32));
return colorList;
}
/**
* Get the closest color name from our list
*
* @param r
* @param g
* @param b
* @return
*/
public String getColorNameFromRgb(int r, int g, int b) {
ArrayList<ColorName> colorList = initColorList();
ColorName closestMatch = null;
int minMSE = Integer.MAX_VALUE;
int mse;
for (ColorName c : colorList) {
mse = c.computeMSE(r, g, b);
if (mse < minMSE) {
minMSE = mse;
closestMatch = c;
}
}
if (closestMatch != null) {
return closestMatch.getName();
} else {
return "No matched color name.";
}
}
/**
* Convert hexColor to rgb, then call getColorNameFromRgb(r, g, b)
*
* @param hexColor
* @return
*/
public String getColorNameFromHex(int hexColor) {
int r = (hexColor & 0xFF0000) >> 16;
int g = (hexColor & 0xFF00) >> 8;
int b = (hexColor & 0xFF);
return getColorNameFromRgb(r, g, b);
}
public int colorToHex(Color c) {
return Integer.decode("0x"
+ Integer.toHexString(c.getRGB()).substring(2));
}
public String getColorNameFromColor(Color color) {
return getColorNameFromRgb(color.getRed(), color.getGreen(),
color.getBlue());
}
/**
* SubClass of ColorUtils. In order to lookup color name
*
* @author Xiaoxiao Li
*
*/
public class ColorName {
public int r, g, b;
public String name;
public ColorName(String name, int r, int g, int b) {
this.r = r;
this.g = g;
this.b = b;
this.name = name;
}
public int computeMSE(int pixR, int pixG, int pixB) {
return (int) (((pixR - r) * (pixR - r) + (pixG - g) * (pixG - g) + (pixB - b)
* (pixB - b)) / 3);
}
public int getR() {
return r;
}
public int getG() {
return g;
}
public int getB() {
return b;
}
public String getName() {
return name;
}
}
}
31
Author: cindyxiaoxiaoli, 2014-02-03 22:33:56
Hmm, c'est une sorte de problème amusant. Je peux penser à quelques solutions:
Vous pouvez faire un peu de conjecture en fonction des relations entre les valeurs R-G-B (par exemple, si une couleur est très dominante, vous devinez celle-ci, mais s'il y a un peu d'autre couleur, vous avez de plus en plus de chances de deviner la combinaison de ces deux couleurs émises, si toutes les trois sont proches de l'égalité, alors devinez blanc, gris ou noir selon la hauteur de la moyenne des trois valeurs, si deux sont élevés et l'autre est faible devinez la combinatoin des deux, etc. etc.)
Vous pouvez opter pour une approche plus d'apprentissage où vous définissez des suppositions initiales (comme ci-dessus), puis améliorez celles basées sur les commentaires des utilisateurs.
Malheureusement, ce problème est relativement subjectif (bien que la question ne l'est pas!) comme la perception des gens de la couleur varie considérablement entre la culture et même le sexe (voir Randall Munroe "étude" sur elle ).
Si vous voulez un sous-ensemble spécifique de valeurs RVB (comme celles qui reçoivent des constantes en Java ou C#, vous pouvez parcourir chacune et comparer, renvoyant enfin une valeur par défaut si elle n'est égale à aucune d'entre elles).
[MODIFIER]
Ahh! Utilisateurs daltoniens hein? Avez-vous envisagé de créer un paramètre qui permet à l'utilisateur de spécifier les couleurs qu'il a du mal à différencier? Si vous le faisiez, vous pourriez leur faire savoir que quelque chose est "20% Plus rouge que vert" (si, par exemple, ils avaient daltonien rouge-vert, qui est le plus commun). Qui serait assez simple. Ils sélectionnent un pixel, et vous suivez ce pseudocode:
if( userColorTrouble == RedGreen )
{
int redVal = colorInQuestion.GetRed();
int greenVal = colorInQuestion.GetGreen();
if( redVal > greenVal )
{
return "The color is " + (double)redVal / (redVal + greenVal) - .5d + "% redder than green";
}
else
{
return "The color is " + (double)greenVal / (redVal + greenVal) - .5d + "% greener than red";
}
}
Cela pourrait être une solution plus simple et plus utile.
4
Author: Chris Pfohl, 2010-11-08 20:27:29
Vous pouvez simplement construire une table de recherche, par exemple en utilisant les constantes de la classe de couleur elle-même:
Map<Integer, String> map = new HashMap<Integer, String>();
for (Field f : Color.class.getFields()) {
if (f.getType() == Color.class) {
Color c = (Color) f.get(null);
map.put(c.getRGB(), f.getName());
}
}
Si vous voulez toutes les couleurs HTML ou toutes celles de Wikipedia liées par @evan, vous avez encore un peu de devoirs à faire.
MODIFIER la carte résultante:
0xff00ffff: CYAN
0xff0000ff: BLUE
0xffc0c0c0: LIGHT_GRAY
0xff808080: GRAY
0xffffff00: YELLOW
0xffff0000: RED
0xffffafaf: PINK
0xff000000: BLACK
0xff00ff00: GREEN
0xffffc800: ORANGE
0xff404040: DARK_GRAY
0xffff00ff: MAGENTA
0xffffffff: WHITE
3
Author: sfussenegger, 2010-11-08 21:51:11
Toutes les valeurs RVB n'ont pas d'alias. Vous devrez peut-être créer un tableau contenant des tableaux de valeurs Rouge, Vert, Bleu et Alias. Ensuite, vous itéreriez sur ce tableau en comparant les valeurs RVB.
Http://en.wikipedia.org/wiki/List_of_colors
Modifier:
Échantillon:
//array of known aliases and rgb values
ArrayList colorList = new ArrayList();
colorList.add(new String[] {"255", "0", "0", "Red"});
//etc...
Color c = new Color(255, 0, 0); //test color
String name = "Unknown";
for (String[] color : colorList)
{
int r = Integer.parseInt(color[0]) //red value
int g = Integer.parseInt(color[1]) //green value
int b = Integer.parseInt(color[2]) //blue value
String alias = color[3];
if ((c.getRed() == r) && (c.getGreen() == g) && (c.getBlue() == b))
{
name = alias; //found it
break;
}
}
2
Author: Evan Mulawski, 2010-11-08 17:12:18
La première partie de tous les pixels de RVB à HSV. Il est beaucoup plus facile de définir des plages de couleurs en HSV qu'en RVB.
/**
*
*@author Tomasz Drobiszewski
*/
public class Color {
/**
* Human color table.
*/
public static final int [] [] colors = {
{-1,-10,-360,-0,-100,-10,-80},
{1,0,360,0,100,0,50},
{2,0,360,0,15,50,130},
{3,0,360,0,15,130,210},
{4,-15,15,15,100,50,255},
{5,15,45,15,100,50,255},
{6,45,75,15,100,50,255},
{7,75,105,15,100,50,255},
{8,105,135,15,100,50,255},
{9,135,165,15,100,50,255},
{10,165,195,15,100,50,255},
{11,195,225,15,100,50,255},
{12,225,255,15,100,50,255},
{13,255,285,15,100,50,255},
{14,285,315,15,100,50,255},
{15,315,345,15,100,50,255},
{16,345,375,15,100,50,255},
{17,0,360,0,15,210,255}
};
/**
* Color names.
*/
public static final String [] humanColors = {
"unrecognized",
"black", //black colors[1]
"grey",
"light_grey",
"red",
"orange",
"yellow",
"jasny_zielony",
"zielony",
"zielony",
"turkusowy",
"jasny_niebieski",
"niebieski",
"fioletowy",
"fioletowy",
"rozowy",
"czerwony",
"bialy",
};
/**
* Convert from RGB do HSV
*
* @param r
* @param g
* @param b
* @param hsv
*/
public static void rgb2hsv(int r, int g, int b, int hsv[]) {
int min; // Min. value of RGB
int max; // Max. value of RGB
int delMax; // Delta RGB value
if (r > g) {
min = g;
max = r;
} else {
min = r;
max = g;
}
if (b > max)
max = b;
if (b < min)
min = b;
delMax = max - min;
float H = 0, S;
float V = max;
if (delMax == 0) {
H = 0;
S = 0;
} else {
S = delMax / (float) max;
if (r == max)
H = ((g - b) / (float) delMax) * 60;
else if (g == max)
H = (2 + (b - r) / (float) delMax) * 60;
else if (b == max)
H = (4 + (r - g) / (float) delMax) * 60;
}
hsv[0] = (int) (H);
hsv[1] = (int) (S * 100);
hsv[2] = (int) V;
}
/**
* Return human color index {@link Color#colors}
*
* @param r
* @param g
* @param b
* @return
*/
public static int [] getHumanColor(int r, int g, int b) {
int [] res = {0, 0, 0, 0};
int[] hsv = new int[3];
rgb2hsv(r, g, b, hsv);
for (int i = 1; i < colors.length; i++) {
if (hsv[0] <= colors[i][2] && hsv[0] >= colors[i][1]
&& hsv[1] <= colors[i][4] && hsv[1] >= colors[i][3]
&& hsv[2] <= colors[i][6] && hsv[2] >= colors[i][5]) {
res[3] = i;
res[0] = hsv[0];
res[1] = hsv[1];
res[2] = hsv[2];
return res;
}
}
return res;
}
}
1
Author: baklarz2048, 2010-11-08 17:34:56
Dans mon cas, je cherchais un moyen rapide pour obtenir le nom des couleurs primaires affichables sur tous ou toutes les Led afin de la fonction suivante fonctionne pour moi. J'espère que c'est utile à quelqu'un.
public static String getColourName(int c) {
String name = "UNKNOWN";
int colour = Color.BLACK;
if(Color.red(c) > 127) { colour |= Color.RED; }
if(Color.green(c) > 127) { colour |= Color.GREEN; }
if(Color.blue(c) > 127) { colour |= Color.BLUE; }
switch (colour) {
case Color.BLACK:
name = "BLACK";
break;
case Color.BLUE:
name = "BLUE";
break;
case Color.GREEN:
name = "GREEN";
break;
case Color.CYAN:
name = "CYAN";
break;
case Color.RED:
name = "RED";
break;
case Color.MAGENTA:
name = "MAGENTA";
break;
case Color.YELLOW:
name = "YELLOW";
break;
case Color.WHITE:
name = "WHITE";
break;
}
return name;
}
0
Author: rosterloh, 2014-08-12 11:55:42