/**
* All colors and their names
*/
@Suppress("SpellCheckingInspection")
val names = mapOf(
"000000" to "Black",
"000080" to "Navy Blue",
"0000C8" to "Dark Blue",
"0000FF" to "Blue",
"000741" to "Stratos",
"001B1C" to "Swamp",
"002387" to "Resolution Blue",
"002900" to "Deep Fir",
"002E20" to "Burnham",
"002FA7" to "International Klein Blue",object ColorHandler {
/**
* Color sample: 556A74
*/
fun getColorName(color: String): String {
if (color in names.keys)
return names[color]!!
val red = color.slice(R)
val green = color.slice(G)
val blue = color.slice(B)
// what's here???
}
}
val R = 0..1
val G = 2..3
val B = 4..5
0000DD, 0000C8 «расстояние» будет такое:(0x00 - 0x00)^2 + (0x00 - 0x00)^2 + (0xDD - 0xC8)^2 = 441object ColorHandler {
/**
* Color sample: 556A74
*/
fun getColorName(color: String): String {
if (color in names.keys)
return names[color]!!
val r = color.slice(0..1).toInt(16)
val g = color.slice(2..3).toInt(16)
val b = color.slice(4..5).toInt(16)
var currentMin: Pair<Int, String>? = null
var range: Int
names.forEach { (colorValue, name) ->
range = (
(r - colorValue.slice(0..1).toInt(16)).pow() +
(g - colorValue.slice(2..3).toInt(16)).pow() +
(b - colorValue.slice(4..5).toInt(16)).pow()
)
when {
currentMin == null -> {
currentMin = range to name
}
currentMin!!.first > range -> {
currentMin = range to name
}
currentMin!!.first < range -> {
return@forEach
}
}
}
return currentMin!!.second
}
}
struct Color(red: u8, green: u8, blue: u8);
type ColorName = String;
let KNOWN_COLORS: Map<Color, ColorName> = Map {...};
fn get_nearest_known_color_name(color: Color) -> ColorName {
if KNOWN_COLORS.has(color) {
return KNOWN_COLORS.get(color);
}
var (nearest_color, nearest_color_name) = KNOWN_COLORS.first();
var distance = calculate_distance(nearest_color, color);
for (key, value) of KNOWN_COLORS.skip(1) {
var distance = calculate_distance(key, color);
if distance < distance_to_nearest {
distance_to_nearest = distance;
nearest_color = key;
nearest_color_name = value;
}
}
return nearest_color_name;
}
fn calculate_distance(lhs: Color, rhs: Color) -> f64 {
var r = lhs.red - rhs.red;
var g = lhs.green - rhs.green;
var b = lhs.blue - rhs.blue; // вычитаем один вектор из другого
return sqrt(r^2+g^2+b^2); // считаем длину получившегося вектора по теореме пифагора
}
Простой
Простой
Средний
Простой
