Solved

How do I use GetEncoderParameterList?

Posted on 2006-07-21
4
1,680 Views
Last Modified: 2008-01-09
Hi Experts,

What I really want to do is examine a TIFF file and check the compression method as we want to ensure that only files with CCITT FAX3 compression are accepted.  It's taken me a while to consider using GetEncoderParameterList and now that I have I don't seem able to make it work and can't find appropriate examples on the internet.  Can anybody help?

I imagine what I want to do is something like:

Create the image.
Get the Parameter list.
Check the compression parameter.

Seems simple but I'm struggling, probably because of all the Guid involvement which leaves me with a headache!  I don't know how to do this so haven't posted any code, but I'll reply soonest if you need anything.

Many thanks,
Mark
0
Comment
Question by:mdgower
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 15

Accepted Solution

by:
SnowFlake earned 500 total points
ID: 17152967
0
 

Author Comment

by:mdgower
ID: 17153455
Helps tremendously, thank you.

The question this raises for me now is how to be sure that PropertyItem(259) always refers to the compression method?  I'm sure that it does otherwise this code would be almost useless, but I'd be grateful if someone could explain to me why?  Why is it 259 at all, in fact?

Also, can anybody demonstate the use of GetEncoderParameterList to read rather than just save a parameter?

While I welcome these answers and will award points for them, the bulk will certainly go to SnowFlake for resolving my immediate issue.

Many thanks,
Mark
0
 
LVL 15

Expert Comment

by:SnowFlake
ID: 17162454
I am not directly familiar with Tiff structure,
but I guess this is just a fixed index definied in the structure of the file pointing to this information.

the proff for this might be buried somewhere in here:
http://www.ee.cooper.edu/courses/course_pages/past_courses/EE458/TIFF/
0
 

Author Comment

by:mdgower
ID: 17182230
Thanks Snowflake.  I couldn't quite find the answer I was looking for but certainly the problem has been resolved at least.  Thanks again.
0

Featured Post

MS Dynamics Made Instantly Simpler

Make Your Microsoft Dynamics Investment Count  & Drastically Decrease Training Time by Providing Intuitive Step-By-Step WalkThru Tutorials.

Question has a verified solution.

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

Article by: Kraeven
Introduction Remote Share is a simple remote sharing tool, enabling you to see, add and remove remote or local shares. The application is written in VB.NET targeting the .NET framework 2.0. The source code and the compiled programs have been in…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
There are cases when e.g. an IT administrator wants to have full access and view into selected mailboxes on Exchange server, directly from his own email account in Outlook or Outlook Web Access. This proves useful when for example administrator want…
If you’ve ever visited a web page and noticed a cool font that you really liked the look of, but couldn’t figure out which font it was so that you could use it for your own work, then this video is for you! In this Micro Tutorial, you'll learn yo…

691 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