How to put X on intersecting points and find an angle

Hello,

I have one image, i want to measure the angle of intersection between two line as shown in Image. I have trace the boundary that i want, now i want to draw an 'X' at the point of intersection. also want to find an angle.

please help me how to write that code. I also attached my code file name Task.m

the picture i got with boundary name Trace.jpg and the original Image name DSC_2637.png.

Answer 1

[darova]

Try this script

[Prashant]

Hi darova,

thanks for your code and help.

when i ran your code then i am getting this error:

Error using edge
Expected input number 1, I, to be two-dimensional.

Error in edge>parse_inputs (line 482)
validateattributes(I,{'numeric','logical'},{'real','nonsparse','2d'},mfilename,'I',1);

Error in edge (line 213)
[a,method,thresh,sigma,thinning,H,kx,ky] = parse_inputs(args{:});

Error in Versuch (line 21)
I3 = edge(I2);                      % find the edge

[darova]

impossible

[Prashant]

Yes, i do not know. why this error is coming?

[darova]

You changed something. My script works beautifully

[Prashant]

I change only im2bw bcs was me not working so i used imbinarize for that, and i also dignose that when i am using imbinarize then i am getting that same error that i mentioned.

with im2bw is working...

thank you. but as i mentioned in picture that i want to put x point on the red boundary and want to find an angle. could you please give me that solution?

[darova]

can you use text to put 'X' where you want?

Can you show the angle you want to measure?

[Prashant]

Hello darova,

I have described in the image about angle please have a look. I want to show one point, where two line intersecting. It does not matter if it is x or which mark.

[darova]

try this

[Prashant]

Yes thanks, it is working .

[Prashant]

Hello darova,

i wanted to ask you that instead crop that image and getting result, could you also show me the result with full picture?

as you gave me the result as above image, i want to see this angle in original image. could you please help?

thank you in advance.