How to extract dimensions/measurements (i.e. length and width or diameter of a circular part) of certain features or objects in an image?

Hello,

I am very new to MATLAB and doing image processing and classification for the first time and I would really appreciate any assistance in this regard. I am working on creating a code which can classify a particular pavement distress and the quantify the damage as well. I have used transferred learning approach and created a CNN model based on ALEXNET for classifying the pavement distress and now I am working on the quantification part. I was wondering if there is a way to extract measurements from an image (such as length and with of a road along with the the length and with of the damaged part of the road) through some lines of code. Please see the attached images for better understanding of what I am trying to achieve.

I would really appreciate any and every assistance I can get on this,

Thank you in advance.

Answer 1

[Pankhuri Kasliwal]

Hi,

For finding the dimensions of the road you need to convert your imae to binary image and then do pixel counting.

For more information please refer to the following link -

https://in.mathworks.com/matlabcentral/answers/125307-how-i-can-find-the-length-width-of-an-object-in-an-image

[Vinay Chawla]

Thank you for responding. Do I need to perform any kind of segmentation as well?

[Vinay Chawla]

Also, is it easier if I know the spatial resolution of the images? If so, is there a way/ code to know the spatial resolution of the image?