Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Saving Large Photographs on WM6 CF2.0

Posted on 2007-11-27
7
Medium Priority
?
578 Views
Last Modified: 2013-12-05
Hi,
I have a small application that runs on a HTC Touch device. Basically it takes a picture and saves it to a sql server database via a webservice.
The device is running Windows Mobile 6 and the app i developed is running on compact framework 2.0.
The application works fine when using the Small,Medium or Large quality setting on the camera, however if I use the 1megapixel or 2megapixel setting I get a OutOfMemoryException after the picture is taken when i try load the freshly taken picture into a bitmap object.
Here is the memory spec for this device:
RAM
64 MB
 
ROM
128 MB

Any ideas how i can overcome this problem and save a 2mp picture? It is a requirement of the project that
the picture resolution is 2mp.
here is the code im using:

 Dim fileName As String = String.Empty
        Dim ccd As New CameraCaptureDialog
        ccd.Mode = CameraCaptureMode.Still
        ccd.StillQuality = CameraCaptureStillQuality.High
        ccd.ShowDialog()
        fileName = ccd.FileName
        Show()
        PictureBox1.Image = New Bitmap(fileName)'the exception occurs here

        ccd.Dispose()

Cheers
IAn
0
Comment
Question by:bean_ian
[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
  • 4
  • 3
7 Comments
 
LVL 24

Expert Comment

by:alexey_gusev
ID: 20357164
Hi Ian,

is it a must to display newly taken picture? and how do you send it to remote database? maybe it is possible in your design just to read binary data from the file and send it over?

BR,
Alex
0
 

Author Comment

by:bean_ian
ID: 20357186
Yeah the user has to see the taken picture(in order to decide if it needs to be taken again). It is sent to the DB via a webservice(converted to a byte array then in the Webservice converted back to a bitmap). Doesnt even get that far though so that code is not an issue.
0
 
LVL 24

Expert Comment

by:alexey_gusev
ID: 20357343
well, in order to investigate the possible solutions, I would check the memory usage, e.g. if PictureBox.Image is already allocated, how much memory is needed etc.

then I'd try something like this:

http://msdn2.microsoft.com/en-us/library/5ey6h79d.aspx

so the bottom line is to minimize memory usage on copying objects back and forth
0
Free Backup Tool for VMware and Hyper-V

Restore full virtual machine or individual guest files from 19 common file systems directly from the backup file. Schedule VM backups with PowerShell scripts. Set desired time, lean back and let the script to notify you via email upon completion.  

 

Author Comment

by:bean_ian
ID: 20357395
I tried using lockbits to no avail. It makes no difference weather or not i load the image into PictureBox.Image or a brand new bitmap object, the same exception gets thrown
0
 
LVL 24

Accepted Solution

by:
alexey_gusev earned 1800 total points
ID: 20357453
so does it mean that there is absolutely no (or not enough) free memory left at that moment? maybe try to ccd.Dispose() prior to dealing with Bitmap.

in case of "no memory available" I don't see many options left. I believe that sending binary data to web service won't be a problem at all, and the main issue is to display taken picture. Unless you find a way to reduce the memory usage by your application, you probably might convert the image to the lower resolution and display it if it is acceptable. or may be convert it to different format which requires less memory.
0
 

Author Closing Comment

by:bean_ian
ID: 31411170
Thanks alexey. I used your idea and used OpenNetCf 2.1 imaging classes to create a thumbnail and display that and then write the large file directly to the DB.
Thanks for your help
0
 

Author Comment

by:bean_ian
ID: 20358983
Here is the code for anyone who is interested:
Dim ccd As New CameraCaptureDialog
        ccd.Mode = CameraCaptureMode.Still
        ccd.StillQuality = CameraCaptureStillQuality.Default
        ccd.ShowDialog()
        fileName = ccd.FileName
        Show()

        '    bmp = New Bitmap(fileName)
        'bmpEx = New BitmapEx(ccd.FileName)
        Dim oFile As System.IO.FileInfo
        oFile = New System.IO.FileInfo(fileName)
        Dim oFileStream As System.IO.FileStream = oFile.OpenRead()
        ibitmap = OpenNETCF.Drawing.Imaging.ImageUtils.CreateThumbnail(oFileStream, New Drawing.Size(234, 181))
        PictureBox1.Image = OpenNETCF.Drawing.Imaging.ImageUtils.IBitmapImageToBitmap(ibitmap)
        ccd.Dispose()
0

Featured Post

TCP/IP Network Protocol Cheat Sheet

TCP/IP is a set of network protocols which is best known for connecting the machines that make up the Internet. The truth is that TCP/IP is one of the oldest network protocols and its survival is mainly based on its simplicity and universality.

Question has a verified solution.

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

Know the reasons and solutions to move/import EDB to New Exchange Server. Also, find out how to recover an Exchange .edb file and to restore the file back.
By default Outlook 2016 displays only one time zone in the Calendar. The following article explains how to display two time zones in one calendar view.
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…

705 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