change color intensity of rectangles made using matrix

2 次查看（过去 30 天）
Anvinder Singh
Anvinder Singh 2016-3-4
评论： KSSV 2016-3-4
Hi, Can anybody help me understand the concept of color intensity in the following : I have 2 rectangles of black color. I want to give an intensity of 100 to one of them and 300 to the other one. BUt i want them to remain in the grayscale (they should not be colored but should remain between white and black). Is there a scale which matlab uses for such thing ? Is 256 taken as black or some other value ? I am quiet confused.

请先登录，再回答此问题。

采纳的回答

KSSV
KSSV 2016-3-4
Get the color coding from the link: http://www.rapidtables.com/web/color/RGB_Color.htm
% first rectangle
x1 = [0 1/2 1/2 0 0];
y1 = [0 0 1 1 0] ;
% Second rectangle
x2 = [1/2 1 1 1/2 1/2] ;
y2 = [0 0 1 1 0] ;
% fill colors
fill(x1,y1,[51,51,0]/256)
hold on
fill(x2,y2,[0,51,0]/256)
  2 个评论
Anvinder Singh
Anvinder Singh 2016-3-4
Thanks Dr. Siva. Does % first rectangle x1 = [0 1/2 1/2 0 0]; y1 = [0 0 1 1 0] ;" refer to the location of the rectangle coordinates ? Also, in fill(x1,y1,[51,51,0]/256) what does 51 refer to ?(red and green intensity, blue intensity is zero ?)
KSSV
KSSV 2016-3-4
Hey Anvinder
Yes (x1,y1) refer to the locations of the rectangle. [51,51,0]/256 stand for respective [R,G,B] values. You may check the link for other color variations.
Ps: If you find it useful, don't forget to accept the answer.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Line Plots 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by