hsvrgb.h

来自「通过使机器人进行简单的图像识别」· C头文件 代码 · 共 148 行

/********************************************************************
*
* =-----------------------------------------------------------------=
* =                          ____          _________                =
* =                         / _  \         \___  __/                =
* =                        / /_/ /     ____   / /                   =
* =                       /  _   \ ● / _  \ / /                    =
* =                      /  /_/  // // / / // /                     =
* =                      \______//_//_/ /_//_/                      =
* =                                                                 =
* =             Copyright (c) BIN Technology studio,2004            =
* =                           LET'Z BT                              =
* =-----------------------------------------------------------------=
*
*	FileName	: HSVRGB.h
*	Description	: HSV RGB颜色转换和关于颜色结构的定义
*
*	Author		: 风间苍月(TuQbasic)
*	Email		: [e-mail]
*
*	Create		: 2004.04.10
*	LastChange	: 2004.04.10
*
*	History		: 
********************************************************************/ 
#pragma once

class SHSVRGB
{
public:
	typedef struct _sHSV
	{
		float H;		// 色相角(0...360]
		float S;		// 饱和度[0...1]
		float V;		// 明视度[0...1]
	}HSV;

	typedef struct _sInciseColor
	{
		// 切分阈值，HSV模型颜色上下界，注意色相是顺时针两点夹角域
		HSV low;
		HSV top;
	}SHSVRGB::INCISECOLOR;

	static unsigned int HSV2RGBEx(HSV &hsv)
	{
		unsigned char R, G, B;
		if (hsv.S == 0)
			R= G= B= hsv.V * 255;
		else
		{
			int i = hsv.H/= 60;
			float f = hsv.H - i;

			float a = hsv.V * ( 1 - hsv.S) * 255;
			float b = hsv.V * ( 1 - hsv.S * f) * 255;
			float c = hsv.V * ( 1 - hsv.S * (1 - f)) * 255;
			hsv.V*= 255;

			switch(i)
			{
			case 6:
			case 0: R = hsv.V; G = c; B = a; break;
			case 1: R = b; G = hsv.V; B = a; break;
			case 2: R = a; G = hsv.V; B = c; break;
			case 3: R = a; G = b; B = hsv.V; break;
			case 4: R = c; G = a; B = hsv.V; break;
			case 5: R = hsv.V; G = a; B = b; break;
			}
		}
		__asm
		{
			mov ah, 0x00;

			mov	al, R;
			shl eax, 8;
			mov al, G;
			shl eax, 8;
			mov al, B;
		}
	}

	static unsigned char MaxRGB(unsigned char r, unsigned char g, unsigned char b)
	{
		if (r <= g) r= g;
		if (r <= b) r= b;
		return r;
	}

	static unsigned char MinRGB(unsigned char r, unsigned char g, unsigned char b)
	{
		if (r >= g) r= g;
		if (r >= b) r= b;
		return r;
	}

	// 颜色转换，thanks Ehomsoft
	static void RGB2HSVEx(unsigned int rgb, HSV &hsv)
	{
		unsigned char r, g, b;
		{
			//r= (rgb & 0x00FF0000)>>16;
			//g= (rgb & 0x0000FF00)>>8;
			//b= (rgb & 0x000000FF);
			__asm
			{
				mov eax, rgb;
				mov b, al;
				shr eax, 8;
				mov g, al;
				shr eax, 8;
				mov r, al;
			}
		}

		unsigned char cmax, cmin;
		{
			cmax= MaxRGB(r, g, b);
			cmin= MinRGB(r, g, b);
			__asm
			{

			}
		}
	
		if (cmax == cmin)
		{
			hsv.H= hsv.S= hsv.V= .0;
		}
		else
		{
			float submaxmin= cmax - cmin;
			if (r == cmax) 
				hsv.H = (float)( g - b) / submaxmin;
			else if (g == cmax) 
				hsv.H = 2 + (float)( b - r) / submaxmin;
			else if (b == cmax) 
				hsv.H = 4 + (float)( r - g)/ submaxmin;

			hsv.H *= 60;
			if (hsv.H <= 0) 
				hsv.H+= 360;

			hsv.S= (float) submaxmin / cmax;
			hsv.V= (float) cmax / 255;
		}
	}
};