Solved

How to measure sizes and angles in scanned images ?

Posted on 2016-11-22
3
63 Views
Last Modified: 2016-11-25
Hello Experts,
This time our goal is to be able to measure sizes in dental/orthdontic radiographies.
Our app gets the radiography directly from any kind of xray machine,

Now how do you do to measure distances in an image....fox example from this dot to this dot?
we work with visual basic and visual c#

All ideas to measure distances or angles in images are very welcome.
if there is source example also great.

Regards,
0
Comment
Question by:rguillermo
3 Comments
 
LVL 12

Accepted Solution

by:
Dustin Saunders earned 250 total points
ID: 41897771
You can get the distance between two points with something like this:
Point start = new Point(0, 0);
            Point end = new Point(4, 2);
            double a = end.X - start.X;
            double b = end.Y - start.Y;
            double c = Math.Sqrt((a * a) + (b * b));
            Console.WriteLine("Distance is " + c.ToString());

Open in new window


I'm not sure how you are determining the starting point, but maybe have an button that allows the user to create a new point and they can drop a 'pin' from there.

Since you now effectively have a triangle, you can use sin, cos, or tan to determine the angles involved.
https://www.dotnetperls.com/cos-sin-tan
https://www.mathsisfun.com/sine-cosine-tangent.html
0
 
LVL 79

Assisted Solution

by:David Johnson, CD, MVP
David Johnson, CD, MVP earned 250 total points
ID: 41898263
the distance will be in pixels you will need some type of conversion table to get the distance measurement you want. so you need a reference measurement on the actual picture itself. Without this reference the measurement numbers are irrelevant.  i.e. when I take a picture of something I will include a tape measure to show the distance. The X-Ray Tech should have a device of some sort to include in the picture available or it will be available from your medical supply office.
0
 

Author Closing Comment

by:rguillermo
ID: 41901994
Excellent !
Thank you Experts !!!
0

Featured Post

Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

This article describes some techniques which will make your VBA or Visual Basic Classic code easier to understand and maintain, whether by you, your replacement, or another Experts-Exchange expert.
Since upgrading to Office 2013 or higher installing the Smart Indenter addin will fail. This article will explain how to install it so it will work regardless of the Office version installed.
Get people started with the process of using Access VBA to control Outlook using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Microsoft Outlook. Using automation, an Access applic…
Get people started with the utilization of class modules. Class modules can be a powerful tool in Microsoft Access. They allow you to create self-contained objects that encapsulate functionality. They can easily hide the complexity of a process from…

821 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question