Length and width calculation

Question

Hello, I’m developing an application in Octave, which is very similar to Mathlab and C, which calculates the height and width of an object, which in this case is a seed.

The program receives an input image and then binarizes. I would like to know how to calculate this distance, because I have researched a lot and I could not understand very well.

One of the questions is: How to find the two points in the image to measure the distance between them? Because like, in my thought I have to get to the "middle" of the object, the top and "go down" a line to the end of the object, that way I would have a line of pixels, that after performing a rule of three with another object of known size, I would get this information.

Grateful from now on.

Answer 1

If it’s a color image,

I = imread("minhaImagem.png");
img = I(1);
[width, height, colorDepth] = size(img);

disp(width); disp(height)

If it’s a monochromatic image,

I = imread("minhaImagem.bmp");
img = I(1);
[width, height] = size(img);

disp(width); disp(height)

If it’s an animated image,

I = imread("minhaImagem.gif");
img = I(1);
[width, height, colorDepth, timing] = size(img);

disp(width); disp(height)