acm GBR HLV转换

  1. #include <stdio.h>
  2. #include <string>
  3. #include <iostream>
  4. #include <algorithm>
  5. #include <string.h>
  7. using namespace std;
  9. void RGB2HSV(double R, double G, double B, double &H, double &S, double &V)
  10. {
  11.      // r,g,b values are from 0 to 1
  12.     // h = [0,360], s = [0,1], v = [0,1]
  13.     // if s == 0, then h = -1 (undefined)
  14.     double min, max, delta,tmp;
  15.     tmp = R>G?G:R;
  16.     min = tmp>B?B:tmp;
  17.     tmp = R>G?R:G;
  18.     max = tmp>B?tmp:B;
  20. 	R/=255; G/=255; B/=255;
  21. 	
  22. 	min/=255;
  23. 	max /= 255;
  25.     V = max; // v
  26.     delta = max - min;
  27.     if( max != 0 )
  28. 		S = delta / max; // s
  29.     else
  30.     {
  31.     	// r = g = b = 0 // s = 0, v is undefined
  32. 		S = 0;
  33. 		H = 0;
  34.     	return;
  35.     }
  36. 	if (delta == 0){
  37. 		H = 0;
  38. 		return;
  39. 	}
  40. 	else if(R == max){
  41. 		if (G >= B)
  42.         	H = (G - B) / delta; // between yellow & magenta
  43. 		else
  44. 			H = (G - B) / delta + 6.0;
  45. 	}
  46. 	else if( G == max )
  47.         H = 2.0 + ( B - R ) / delta; // between cyan & yellow
  48. 	else if (B == max)
  49.         H = 4.0 + ( R - G ) / delta; // between magenta & cyan
  50.     H *= 60.0; // degrees
  51. }
  54. void RGB2HSL(double R, double G, double B, double &H, double &S, double &L)
  55. {
  56.      // r,g,b values are from 0 to 1
  57.     // h = [0,360], s = [0,1], v = [0,1]
  58.     // if s == 0, then h = -1 (undefined)
  59.     double min, max, delta,tmp;
  60.     tmp = R>G?G:R;
  61.     min = tmp>B?B:tmp;
  62.     tmp = R>G?R:G;
  63.     max = tmp>B?tmp:B;
  65. 	R/=255; G/=255; B/=255;
  66. 	
  67. 	min/=255;
  68. 	max /= 255;
  70.     L = (max+min)/2; // v
  71.     delta = max - min;
  74. 	if(L==0 || delta == 0)
  75. 		S = 0;
  76. 	else if(L <= 0.5 && L >0)
  77. 		S =(max-min)/(2*L);
  78. 	else
  79. 		S =(max-min)/(2-2*L);
  83. 	if (delta == 0){
  84. 		H = 0;
  85. 		return;
  86. 	}
  87. 	else if(R == max){
  88. 		if (G >= B)
  89.         	H = (G - B) / delta; // between yellow & magenta
  90. 		else
  91. 			H = (G - B) / delta + 6.0;
  92. 	}
  93. 	else if( G == max )
  94.         H = 2.0 + ( B - R ) / delta; // between cyan & yellow
  95. 	else if (B == max)
  96.         H = 4.0 + ( R - G ) / delta; // between magenta & cyan
  97.     H *= 60.0; // degrees
  98. }
  99.  
  100. //函数把val转到r、g、b里面
  101. void HSV2RGB(double H, double S, double V, double &R, double &G, double &B)
  102. {
  103.  //hsv to rgb
  104. 	S/=100;
  105. 	V/=100;
  107. 	double C = V *S;
  108. 	H /= 60;
  110. 	double tp;
  111. 	if(int(H) % 2 - 1 > 0)	tp =int(H) % 2 - 1;
  112. 	else
  113. 		tp = 1-int(H) % 2 ;
  114. 	double X = C*(1- tp);
  115. 	double m = V-C;
  117. if(H<1)
  118. 	{
  119. 		R = (C+m+ 0.005)*255;
  120. 		G = (X+ m+ 0.005)*255;
  121. 		B = (0 +m+ 0.005)*255;
  122. 		return;
  123. 	}
  124. 	if(H<2)
  125. 	{
  126. 		R = (X +m+ 0.005)*255;
  127. 		G = (C +m+ 0.005)*255;
  128. 		B = (0 +m+ 0.005)*255;
  129. 		return;
  130. 	}
  132. 	if(H<3)
  133. 	{
  134. 		R = (0 + m+ 0.005)*255;
  135. 		G =	(C + m+ 0.005)*255;
  136. 		B =	(X + m+ 0.005)*255;
  137. 		return;
  138. 	}
  139. 	if(H<4)
  140. 	{
  141. 		R = (0 + m+ 0.005)*255;
  142. 		G =	(X + m+ 0.005)*255;
  143. 		B =	(C + m+ 0.005)*255;
  144. 		return;
  145. 	}
  146. 	if(H<5)
  147. 	{
  148. 		R = (X + m+ 0.005)*255;
  149. 		G = (0 + m+ 0.005)*255;
  150. 		B = (C + m+ 0.005)*255;
  151. 		return;
  152. 	}
  153. 	if(H<6)
  154. 	{
  155. 		R = (C + m + 0.005)*255;
  156. 		G = (0 + m + 0.005)*255;
  157. 		B = (X + m + 0.005)*255;
  158. 		return;
  159. 	}
  160. }
  162. void HSL2RGB(double H, double S, double L, double &R, double &G, double &B)
  163. {
  164. 	L/=100;
  165. 	S/=100;
  166. 	
  167. 	double tp;
  168. 	if(2*L-1 >= 0)	tp = 2*L-1;
  169. 	else
  170. 		tp = 1-2*L;
  171. 	double C =(1-tp)*S; 
  172. 	H /= 60;
  173. 	d
  174. 	if(int(H) % 2 - 1 > 0)	tp =int(H) % 2 - 1;
  175. 	else
  176. 		tp = 1-int(H) % 2 ;
  177. 	double X = C*(1- tp);
  178. 	double m = L - C*0.5;
  180. 	if(H<1)
  181. 	{
  182. 		R = (C+m+ 0.005)*255;
  183. 		G = (X+ m+ 0.005)*255;
  184. 		B = (0 +m+ 0.005)*255;
  185. 		return;
  186. 	}
  187. 	if(H<2)
  188. 	{
  189. 		R = (X +m+ 0.005)*255;
  190. 		G = (C +m+ 0.005)*255;
  191. 		B = (0 +m+ 0.005)*255;
  192. 		return;
  193. 	}
  195. 	if(H<3)
  196. 	{
  197. 		R = (0 + m+ 0.005)*255;
  198. 		G =	(C + m+ 0.005)*255;
  199. 		B =	(X + m+ 0.005)*255;
  200. 		return;
  201. 	}
  202. 	if(H<4)
  203. 	{
  204. 		R = (0 + m+ 0.005)*255;
  205. 		G =	(X + m+ 0.005)*255;
  206. 		B =	(C + m+ 0.005)*255;
  207. 		return;
  208. 	}
  209. 	if(H<5)
  210. 	{
  211. 		R = (X + m+ 0.005)*255;
  212. 		G = (0 + m+ 0.005)*255;
  213. 		B = (C + m+ 0.005)*255;
  214. 		return;
  215. 	}
  216. 	if(H<6)
  217. 	{
  218. 		R = (C + m + 0.005)*255;
  219. 		G = (0 + m + 0.005)*255;
  220. 		B = (X + m + 0.005)*255;
  221. 		return;
  222. 	}
  223. 	
  224. }
  226. int main()
  227. {
  228. 	freopen("read.txt", "r", stdin);
  230. 	char str1[100], str2[100];
  232. 	while(cin >> str1)
  233. 	{
  234. 		double a, b, c;
  235. 		double tp1, tp2, tp3;
  236. 		//cin >> str2 >> a >> b >>c; 
  237. 		if(strcmp(str1, "RGB") == 0)
  238. 		{
  239. 			scanf("%s", str2);
  241. 			if(strcmp(str2, "RGB") == 0) 
  242. 			{
  243. 				scanf("%lf %lf %lf", &a, &b, &c);
  244. 				cout << "RGB" << ' ' <<int(a) << ' ' << int(b) << ' ' << int(c) <<endl;
  245. 			}
  246. 			else if(strcmp(str2, "HSL") == 0)	
  247. 			{
  248. 				scanf("%lf %lf%% %lf%%", &a, &b, &c);
  249. 				double r, g, f;
  250. 				HSL2RGB(a, b, c, r, g, f);
  251. 				cout << "RGB" << ' ' << int(r+0.5) << ' ' << int(g+0.5) << ' ' << int(f+0.5) <<endl;
  252. 			}
  253. 			else
  254. 			{
  255. 				scanf("%lf %lf%% %lf%%", &a, &b, &c);
  256. 				double r, g, f;
  257. 				HSV2RGB(a, b, c, r,g, f);
  258. 				cout << "RGB" << ' ' << int(r+0.5) << ' ' << int(g+0.5) << ' ' << int(f+0.5) <<endl;
  259. 			}
  260. 		}
  261. 		else if(strcmp(str1, "HSL") == 0)
  262. 		{
  263. 			scanf("%s", str2);
  264. 			if(strcmp(str2, "HSL") == 0)
  265. 			{
  266. 				scanf("%lf %lf%% %lf%%", &a, &b, &c);
  267. 				cout << "HSL" << ' '<< int(a)  << ' ' << int(b) << '%' << ' '<<int(c) << '%' <<endl;
  268. 			}
  269. 			else if(strcmp(str2, "RGB") == 0)
  270. 			{
  271. 				scanf("%lf %lf %lf", &a, &b, &c);
  272. 				RGB2HSL(a, b, c, tp1, tp2, tp3);
  273. 				cout << "HSL" << ' '<< int(tp1+0.5)  << ' '<< int((tp2+0.005)*100) << '%' << ' ' << int((tp3+0.005)*100) << '%' <<endl;
  274. 			}
  275. 			else
  276. 			{
  277. 				scanf("%lf %lf%% %lf%%", &a, &b, &c);
  278. 				double r, g, f;
  279. 				HSV2RGB(a, b, c, r, g, f);
  280. 				RGB2HSL(r, g, f, tp1, tp2, tp3);
  281. 				cout << "HSL" << ' '<< int(a)  << ' '<< int((tp2+0.005)*100) << '%' << ' ' << int((tp3+0.005)*100) << '%' <<endl;
  282. 			}
  283. 		}
  284. 		else
  285. 		{
  286. 			scanf("%s", str2);
  287. 			if(strcmp(str2, "RGB") == 0)
  288. 			{
  289. 				scanf("%lf %lf %lf", &a, &b, &c);
  290. 				RGB2HSV(a, b, c, tp1, tp2, tp3);
  291. 				cout << "HSV" << ' ' << int(tp1+0.5)  << ' '<< int((tp2+0.005)*100) << '%' << ' ' << int((tp3+0.005)*100) << '%' <<endl;
  292. 			}
  293. 			else if(strcmp(str2, "HSL") == 0)
  294. 			{
  295. 				scanf("%lf %lf%% %lf%%", &a, &b, &c);
  296. 				double r, g, f;
  297. 				HSL2RGB(a, b, c, r, g, f);
  298. 				RGB2HSV(r, g, f, tp1, tp2, tp3);
  299. 				cout << "HSV" << ' '<< int(a)  << ' '<< int((tp2+0.005)*100) << '%' << ' ' << int((tp3+0.005)*100) << '%' <<endl;
  300. 			}
  301. 			else
  302. 			{
  303. 				scanf("%lf %lf%% %lf%%", &a, &b, &c);
  304. 				cout << "HSV" << ' '<< int(a)  << ' ' << int(b) << '%' << ' '<<int(c) << '%' <<endl;
  305. 			}
  306. 		}
  307. 	}
  308. 	return 0;
  309. }





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    原文地址：https://www.cnblogs.com/sober-reflection/p/b0618c20550f930ee56b88515b825cf6.html