在 MATLAB 中对 HSV 颜色空间进行建模 [英] Modeling HSV Color Space in MATLAB
本文介绍了在 MATLAB 中对 HSV 颜色空间进行建模的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我可以在 MATLAB 中创建 3D 锥体,但是:有人知道如何绘制锥体以重新创建 HSV 颜色空间吗?我知道有命令:
颜色图 hsv;
但是我该如何使用它呢?
提前致谢.
解决方案
我猜你想在下面创建一个类似于圆锥的情节 表面.你可以这样做:
% 首先,创建一个 100×100 的图像来纹理圆锥体:H = repmat(linspace(0, 1, 100), 100, 1);% 100 x 100 色调S = repmat([linspace(0, 1, 50) ... % 100×100 饱和度linspace(1, 0, 50)].', 1, 100);%'V = repmat([ones(1, 50) ... % 100×100 值linspace(1, 0, 50)].', 1, 100);%'hsvImage = cat(3, H, S, V);% 创建 HSV 图像C = hsv2rgb(hsvImage);% 将其转换为 RGB 图像% 接下来,创建圆锥曲面坐标:theta = linspace(0, 2*pi, 100);% 角点X = [零(1, 100);... % X 坐标余弦(θ);...零(1, 100)];Y = [零(1, 100);... % Y 坐标罪(θ);...零(1, 100)];Z = [2.*ones(2, 100);... % Z 坐标零(1, 100)];% 最后,绘制纹理映射表面:冲浪(X,Y,Z,C,'FaceColor','texturemap','EdgeColor','none');轴相等
你应该得到下图:
I am able to create a 3D cone in MATLAB, but: does anyone know how to paint the cone so that it recreates the HSV color space? I know there is the command:
colormap hsv;
but how do I use it?
Thanks in advance.
解决方案
I'm guessing you want to create a plot similar to the cone in the following Wikipedia image:
One way to do this is to plot your cone and texture map the surface with an image of the HSV color space. Here's how you could do this:
% First, create a 100-by-100 image to texture the cone with:
H = repmat(linspace(0, 1, 100), 100, 1); % 100-by-100 hues
S = repmat([linspace(0, 1, 50) ... % 100-by-100 saturations
linspace(1, 0, 50)].', 1, 100); %'
V = repmat([ones(1, 50) ... % 100-by-100 values
linspace(1, 0, 50)].', 1, 100); %'
hsvImage = cat(3, H, S, V); % Create an HSV image
C = hsv2rgb(hsvImage); % Convert it to an RGB image
% Next, create the conical surface coordinates:
theta = linspace(0, 2*pi, 100); % Angular points
X = [zeros(1, 100); ... % X coordinates
cos(theta); ...
zeros(1, 100)];
Y = [zeros(1, 100); ... % Y coordinates
sin(theta); ...
zeros(1, 100)];
Z = [2.*ones(2, 100); ... % Z coordinates
zeros(1, 100)];
% Finally, plot the texture-mapped surface:
surf(X, Y, Z, C, 'FaceColor', 'texturemap', 'EdgeColor', 'none');
axis equal
And you should get the following figure:
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