×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Image Analysis

Image Analysis

Image Analysis

(OP)
I have a couple of AFM images of Quantum DOTs and need to process them. Here is the idea? I have the JPG or TIFF file with some dot on the image and can transfer it to gray scale and make a threshhold and then count the number of dots and the Ic an find the density. I also need to find the distribution of size? is there any softwar that can Help me?

RE: Image Analysis

If you want to simply do all of that by hand, grab something like Paint Shop Pro Trial and go to it... free.  Distribution of size is another matter, but it's doable... one way (although very time consuming) would be to crop each dot and count the number of pixels above the threshold (look at the histogram data)... you know the total image size, so you can get dot size relative to all other dots in the image by looking at their relative pixel counts.

If you want something automated, that's going to cost you a bit more.  There are programs that do just as you described in the scientific community, but they charge an arm and a leg for it (they figure most scientists are too busy to implement such simplistic software themselves, so they charge accordingly).

The more steps you can do yourself, the cheaper it is.

Dan
Owner
http://www.Hi-TecDesigns.com

RE: Image Analysis

You could try Matlab and its Image Processing toolbox.

Alternately, you can try Imagetool, which is a free download and has some capabilities along those lines:
http://ddsdx.uthscsa.edu/dig/itdesc.html

TTFN



RE: Image Analysis

(OP)
Thanks IR Stuff.
I have the free software I think I need to check the image processing toolbox of MatLab.
Sean

RE: Image Analysis

I had a similar problem: I made a BMP format file(of 5,2 MBytes) and read it as a string of integer values (0...255) into a variable that was declared in four dimensions, for red, blue, green and white (as a sume of the previous three)and with a lenght of the number of pixels on your image. Then you can make any statistic that you wish. To make a discrimination of 8 adjacent points of each particular point I used a minimum gradient threshold to separate significant differences among points. If you adjust the threshold limit you will separate them very efficiently.
m777182

RE: Image Analysis

Try Image Pro from Media Cybernetics, a very good image analysis package, it has all the image analysis tools you need. Or you could go for the free ImageJ which has the same features but lacks the slick user interface.

RE: Image Analysis

(OP)
Thanks,

I am using ImageJ. It is giving me reasonable results.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

White Paper - How to Capitalize on HVAC/R Trends to Drive Business Growth
According to Steve Yurek, CEO of the Air Conditioning, Heating and Refrigeration Institute, the HVAC/R industry is facing change on all fronts. This includes challenging trends on contractors and distributors like new refrigerants, growing automation, complex sensors and monitoring, green initiatives and a technician shortage. We look at these trends and outline actionable insights on how it all can be turned into a competitive advantage and business opportunity. Download Now
eBook - Manufacturing the Cars of Tomorrow
In this ebook, we'll explore how additive manufacturing is going to transform the way cars are made. This includes commentary from thought leaders such as Ford's CTO, Ken Washington, Customer case studies of ways 3D printing is being used today, and a variety of part examples where 3D printing is already impacting how automobiles are made. Download Now
White Paper - Smart Manufacturing for Semiconductor
New technologies and approaches present great opportunities for semiconductor manufacturers to achieve high levels of innovation, yield and improvement. This white paper explores some of these cutting-edge technologies and how they can be applied effectively in the semiconductor industry. Read about how Smart Manufacturing is transforming the semiconductor industry. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close