如何在matlab中在图像上画一条线? [英] How to draw a line on an image in matlab?

问题描述

我有两点可以说:

• P(x,y) [点位于图像顶部]
• P'(x',y') [点位于图像底部]

现在我想在这两个点之间画一条线......并且这条线应该出现在图像上意味着应该是可见的.

Now i want to draw a line betwen these two points....and the line should appear on image means should be visible.

怎么做????

推荐答案

在图像上绘制线条的最简单方法是使用 PLOT.

The simplest way to draw a line onto an image is to use PLOT.

%# read and display image
img = imread('autumn.tif');
figure,imshow(img)

%# make sure the image doesn't disappear if we plot something else
hold on

%# define points (in matrix coordinates)
p1 = [10,100];
p2 = [100,20];

%# plot the points.
%# Note that depending on the definition of the points,
%# you may have to swap x and y
plot([p1(2),p2(2)],[p1(1),p2(1)],'Color','r','LineWidth',2)

如果您想要不同的颜色，请将字母更改为 rgbcmykw 中的任何一个，或使用 RGB 三元组(红色为 [1 0 0]).查看 lineseries 属性 了解更多格式选项.

If you want a different color, either change the letter to any of rgbcmykw, or use RGB triplets (red is [1 0 0]). Have a look at the lineseries properties for more formatting options.

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