How to assign zero value to plotted lines

2 次查看（过去 30 天）
S C.Carl
S C.Carl 2016-1-6
回答： harjeet singh 2016-1-6
Hi,
I have the following codes to plot lines on an image. I want to assign zero value to the lines plotted by the following codes. How can I do this ?
plot([xleft xleft],[ytop ybottom],'b','LineWidth',2);
plot([xright xright],[ytop ybottom],'b','LineWidth',2);
plot([xleft xright],[ymiddle ymiddle],'r','LineWidth',2);
plot([xmiddle xright],[ytop ymiddle],'y','LineWidth',2);
plot([xmiddle xright],[ybottom ymiddle],'y','LineWidth',2);
plot([floor(xmiddle/2) xright],[ytop ymiddle],'g','LineWidth',2);
plot([floor(xmiddle/2) xright],[ybottom ymiddle],'g','LineWidth',2);
  4 个评论
显示 2更早的评论
Jan
Jan 2016-1-6
It does not makes sense to assign a number to a pixel or to a line. What do you expect as result of such an "assignment"?
Geoff Hayes
Geoff Hayes 2016-1-6
@S.C. - are you trying to draw a box (square or rectangle) on an image (perhaps shown with imshow) with its lines coloured black (zero for each of the red, green, and blue pixel along these lines)?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

harjeet singh
harjeet singh 2016-1-6
hello dear use this code
clear all
close all
clc
x_left=10;
y_left=10;
x_right=100;
y_right=100;
img(1:200,1:200,1:3)=255;
img=uint8(img);
img(x_left:x_right,y_left,:)=0;
img(x_left:x_right,y_right,:)=0;
img(x_left,y_left:y_right,:)=0;
img(x_right,y_left:y_right,:)=0;
figure(1)
imshow(img)

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