Angle display of binary image

I have a binary image. My main problem is that, is it possible for me to set a specific place or point to display an angle? Example, I want to set arm and hip part to be display its angle. So, for the next image captured, it will automatically display the angle at the hip and arm spot. Someone help me please?

[Rik]

It might be possible to do this automatically, but it will be very difficult. Is it also good enough if the lines defining the angles are placed manually?

Answer 1

[Image Analyst]

" is it possible for me to set a specific place or point to display an angle?" Yes. You didn't say that finding the endpoints was your problem, just setting the points to display - to display a line I guess. So, just specify the x and y coordinates and use line() or plot:

line([x1, x2], [y1, y2]);

[NURUL AMIRA MHD RIZAL]

Means that at x1, x2, y1 and y2 I have to insert a value? How can I know the value? I'm sorry for asking too much. I'm still a newbie in Matlab.

[Image Analyst]

You don't "insert" a value into them. You "assign" or "compute" them through whatever algorithm you're using to find the hip and arm spots. I don't know what algorithm that is (you didn't share it, nor ask how to do it), but presumably you already have solved that part. So then you just compute/assign the x and y values and send them into the line() function.

[NURUL AMIRA MHD RIZAL]

I didn't solve that algorithm to find hip and arm spots yet. I'm trying to do hough algorithm but it didn't work. Do you know how to find that spot specifically? Would be glad if you can help me

[Rik]

You can use getpts if selecting manually is an options for you.

[NURUL AMIRA MHD RIZAL]

Okayy. I will try using it. But how to make it automatically select?

[Image Analyst]

Drill down into the references https://blogs.mathworks.com/cleve/2016/04/11/the-eigenwalker-model-of-the-human-gait/