如何在Matlab中的图像上画一条线? [英] How to draw a line on an image in matlab?
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问题描述
我有两点可以说:
- P(x,y)[点位于图像的顶部]
- P'(x',y')[点位于图像的底部]
现在我要在这两点之间画一条线....该线应出现在图像上,意味着应该可见.
Now i want to draw a line betwen these two points....and the line should appear on image means should be visible.
该怎么做????
推荐答案
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)
如果要使用其他颜色,请将字母更改为任何rgbcmykw
,或使用RGB三胞胎(红色为[1 0 0]
).请查看 lineseries属性了解更多格式设置选项
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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