how to calculate the distance between two pixels?

find the distance between two pixels in an image..

Answer 1

[vaishali]

dist=sqrt((y2-y1)^2+(x2-x1)^2);%%%% Where (x1,y1) and (x2,y2) are coordinates of two pixels

Answer 2

[tami]

hello, i actually have a followup question, I am trying to find a way to calculate the distance between edges of an image created by edge detection toolbox. The edges are painted white on the image, and i need to somehow calculate the distance automatically between the longest distance of each edge. For example if the edge is a square - i would like to calculate the width and length of it.

Thank you Tamir

[tami]

What you are asking for can be done all though it does require advanced programming capabilities, first you must write a function that detects all the pixels that have been changed due to the edge detection function and use a Gaussian algorithem to calculate each pixels distance from all the other pixels.

dist=sqrt((y2-y1)^2+(x2-x1)^2);%%%% Where (x1,y1) and (x2,y2) are coordinates of two pixels

This is not recommended for beginners using MATLAB. Good luck

Sayfeddine Veerbeek.

[tami]

Thank you for the quick reply.

How many hours would it take to write that code? Tamir.

[tami]

About 20-30 hrs. for a seasoned programmer.

Sayfeddine Veerbeek.

[ROHINI BHUTE]

if you use images in the form of matrices and command like d(i,j)=sqrt((y2(i,j)-y1(i,j))^2+(x2(i,j)-x1(i,j)^2) then it becomes easier.i am not sure but try this one.