Draw 2 lines in image

Question

Sajid Rahim 2017-8-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/354289-draw-2-lines-in-image

评论： Benjamin Kndson 2018-4-30

2.PNG

i Have a code

I = imread('2.png') ;
I = rgb2gray(I) ;
[y,x] = find(I) ;
figure
imshow(I)
hold on
plot(x,y,'.b')
plot(x(1),y(1),'*y')
plot(x(end),y(end),'*r')

now i want to draw one line from first point(yellow one) and another one line from end point (red one)... plz help me

2 个评论
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KSSV 2017-8-28

YOu can draw infinite lines......what is the criteria to draw lines?

Benjamin Kndson 2018-4-30

Objective. Draw a box using Bresenhams line code http://www.mathworks.com/matlabcentral/fileexchange/12939-bresenhams-line

Draw a perfect box(90 Degree angles, same side lengths)

Allow user to read in an image, then using ginput function, the user can draw a line, anydirection. Based on this line create a perfect box. ask the user for box "left" or "right" from input line.

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Answer 1

KALYAN ACHARJYA 2017-8-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/354289-draw-2-lines-in-image#answer_279438

在 MATLAB Online 中打开

%if true
I = imread('2.png') ;
I = rgb2gray(I) ;
[y,x] = find(I) ;
figure
imshow(I)
hold on
plot(x,y,'.b')
plot(x(1),y(1),'*y')
plot(x(end),y(end),'*r')
hold on;
line([x(1) y(1)], [x(end) y(end)]);
hold off;
%end