Solved

How to Load Single Page From .tif file.

Posted on 2010-11-12
5
765 Views
Last Modified: 2012-06-27
I am currently trying to write a .Tif image viewer in .NET and am running into problems with loading individual pages from the file.

Current Issues/Comments:
1) I know how to load an image from disk using the System.Drawing.Image.FromFile funciton. From there, I can set the Active frame of the image to get to the specific pages - however, this method means I have to load the entire image before traversing the pages. What I want is to just load say, page 2 from a file without having to load the entire file into memory first.
2) I'm currently using .NET. I know this may not be the best solution. If you know of a way for me to do it in another language please speak up.
3) One of my requirements here is that I either must write this from scratch or use a completely royalty free (for commercial) third party tool.

So to summarize, is there a way to load a single page from a .tif file? Idealy, I would assume I need to read the file into a stream, seek to the appropriate place and create the image (page) from that subset of the stream.

Please help.
0
Comment
Question by:PaperlessEnvironments
  • 2
  • 2
5 Comments
 
LVL 11

Expert Comment

by:jasonduan
ID: 34123913
0
 

Author Comment

by:PaperlessEnvironments
ID: 34147817
This code is pretty helpful but not exactly what I'm looking for. In his examples he is still loading the Image using the FromFile method.. for which my understanding is that this loads the entire image into memory.

Does anyone know of a way to only read in specific pages of a file. Maybe by somehow reading the header and then seeking to the position of the page in the file??
0
 
LVL 8

Accepted Solution

by:
davesgonebananas earned 500 total points
ID: 34151141
You could use the TiffBitmapDecoder class in WPF http://msdn.microsoft.com/en-us/library/system.windows.media.imaging.tiffbitmapdecoder.aspx

Alternatively, you could use the third-party LibTiff - available in native .NET format http://bitmiracle.com/libtiff/
0
 

Author Comment

by:PaperlessEnvironments
ID: 34158332
OK, the TiffBitmapEncoder/TiffBitmapDecoder classes are awesome.

Here is what I'm showing in testing:
I have an 80 page tif file where I want to save out page 50 to a separate file...

Using GDI+ it takes 1.01 seconds
Using WPF it takes only 0.09 seconds

MUCH FASTER!!

Now for me to scrap GDI+ completely I need to figure out how to insert/delete pages from the source image. The code below is what I'm working with so far.. this is slow and prone to OOM error... there's got to be a better way. Any ideas?



Dim imageStreamSource As New FileStream(FileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)
                Dim decoder As New TiffBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default)

                Dim encoder As New TiffBitmapEncoder()

                For i As Integer = 0 To decoder.Frames.Count - 1
                    encoder.Frames.Add(BitmapFrame.Create(CType(decoder.Frames(i), BitmapSource)))
                Next

                imageStreamSource.Close()

                Dim stream As New FileStream(FileName, FileMode.Open)
                Dim sm As New System.IO.MemoryStream
                ImageToInsert.Save(sm, System.Drawing.Imaging.ImageFormat.Tiff)
                encoder.Frames.Insert(2, BitmapFrame.Create(sm))

                encoder.Save(stream)
                stream.Close()
                sm.Close()

Open in new window

0
 
LVL 8

Expert Comment

by:davesgonebananas
ID: 34158686
It appears to be possible to create a BitmapSource without using a MemoryStream object.  

http://stackoverflow.com/questions/94456/load-a-wpf-bitmapimage-from-a-system-drawing-bitmap
0

Featured Post

MIM Survival Guide for Service Desk Managers

Major incidents can send mastered service desk processes into disorder. Systems and tools produce the data needed to resolve these incidents, but your challenge is getting that information to the right people fast. Check out the Survival Guide and begin bringing order to chaos.

Question has a verified solution.

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

This article was inspired by a question here at Experts Exchange (http://www.experts-exchange.com/Software/Photos_Graphics/Images_and_Photos/Q_28629170.html). The requirements stated in that question are (1) reduce the file size of a large number of…
In a previous article here at Experts Exchange (http://www.experts-exchange.com/articles/18414/Create-a-PDF-file-with-Contact-Sheets-montage-of-thumbnails-for-all-JPG-files-in-a-folder-and-each-of-its-subfolders-using-an-automated-batch-method.html)…
The goal of the tutorial is to teach the user how to add a water mark to there photo. Once you have a photo you like you have to go into the water mark setting and add a water mark to the image. You can either choose a text watermark or an image…
Learn how to automatically add page numbers in your next InDesign project. This can be very helpful in multi-page books and magazines that you are designing. Make sure your Pages window visible.:  In the document you wish to add page numbers to. Act…

696 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