根据两个颜色的RGB或者HSV，得到两者之间的任意多个过渡颜色。
工具/原料
MATLAB 任意版本
以RGB格式为例
1、目的：计算[R1, G1, B1]、[R2, G2, B2]两种颜色的N个过渡色思路：1.两种[R1, G1, B1]、[R2, G2, B2]颜色对应三维RGB空间中的两个点；2.两点坐标之差[R2-R1, G2-G1, B2-B1]即为一向量V；3.通过将向量V分为N-1段，V/(N-1)；4.则颜色[R1, G1, B1]+(i-1)*V/(N-1)表示将两个颜色间分为N个过渡色的第i个颜色；5.上式当i=1，即为[R1, G1, B1]。当i=N，即为[R2, G2, B2]。
2、过渡颜色计算子程序如下：%Matlab codes%function ResultColor=Transition_Two_Color(Color1,Color2,N)%Transition_Two_Color()% This function is used to calculate the linear transition color between two colors.% The generated color gradually changes from the first color to the second color.%Input：% Color1,% initial color, 1x3 matrix，RGB or HSV, such as [55,130,189]% Color2,% end color, 1x3 matrix，RGB or HSV, such as [235,25,28]% N，% positive integer, number of transition，such as 4%Output：% ResultColor，% Nx3 matrix, the first line is the initial color, the last line is the end color%% quiverC1C2=(Color2-Color1)/(N-1);%每一小段的增量 ResultColor=zeros(N,3);%每一行代表一个过渡颜色，第一行代表初始颜色，最后一行代表末端颜色 for i=1:N ResultColor(i,:)=Color1+quiverC1C2*(i-1);%所有颜色 endend
3、实例1：输出不同相位下的sin(x)%Example 1:%c盟敢势袂lc;x=1:0.1:20;phase=[0,0.5*pi,pi,1.5*pi];Color1=[55,130,189];Color2=[235,25,28];ResultColor=Transition_Two_Color(Color1,Color2,length(phase));%Get the transition colorfigure;subplot(1,2,1)%sinfor iPhase=1:length(phase) y=sin(x+phase(iPhase)); plot(x,y,'linewidth',1.5,'color',ResultColor(iPhase,:)/256);%[R,G,B] in plot.m should convert to range 0 to 1 hold on;endlegend({'phase=0','phase=0.5*pi','phase=pi','phase=1.5*pi'},'FontName','Times New Roman','Fontsize',16);set(gca,'linewidth',1.5,'FontName','Times New Roman','FontSize',16);xlabel('x');ylabel('sin(x+Phase)');title('sin(x+Phase)');实例1结果如下图所示。
4、实例2：输出不同底数的指数函数%Example 2:clc;x=-5:0.1:5;BaseNum=[-2,-1,1,2];Color1=[55,130,189];Color2=[235,25,28];ResultColor=Transition_Two_Color(Color1,Color2,length(BaseNum));for iBaseNum=1:length(BaseNum) y=BaseNum(iBaseNum).^x; plot(x,y,'linewidth',1.5,'color',ResultColor(iBaseNum,:)/256);%[R,G,B] in plot.m should convert to range 0 to 1 hold on;endset(gca,'linewidth',1.5,'FontName','Times New Roman','FontSize',16);legend({'BaseNum=-2','BaseNum=-1','BaseNum=1','BaseNum=2'},'FontName','Times New Roman','Fontsize',16);xlabel('x');ylabel('BaseNum\^x');title('BaseNum\^x');实例2结果如下图所示。
