473,772 Members | 3,148 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Workaround for GetThumbnailIma ge Problem?

I understand that one of the limitations of the Image.GetThumbn ailImage()
function is that it's not really good for creating "large" thumbnails
because if it exists in the image file, the function will take the embedded
thumbnail and actually blow it up to the requested height/width.

Does anyone know if Microsoft will be fixing this "feature" or whether
there's a work around to force the function to use the full image to scale?

Thanks in advance for any comments.
Nov 17 '05 #1
1 3347
Actually, I just figured out a kludgy workaround .....

Use the Image.Save function to save the loaded jpg image to a temporary
filename, then use LoadFromFile to "reload" that temporary file which won't
be saved with a thumbnail image and then pass that image variable into the
GetThumbnailIma ge function which will cause the full size image to be
utilized for generating the thumbnail.

Pretty Kludgy, but this seems to work ....
"Comcast" <ju*********@co mcast.net> wrote in message
news:Dl******** ************@co mcast.com...
I understand that one of the limitations of the Image.GetThumbn ailImage()
function is that it's not really good for creating "large" thumbnails
because if it exists in the image file, the function will take the embedded thumbnail and actually blow it up to the requested height/width.

Does anyone know if Microsoft will be fixing this "feature" or whether
there's a work around to force the function to use the full image to scale?
Thanks in advance for any comments.

Nov 17 '05 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

5
331
by: John | last post by:
I am trying to convert the regular sized images in a directory to thumbnails and then display the thumbnails in a datalist. My code below is displaying the first image and nothing else after it. What do I have to do to have the thumbnails displayed in my datalist? Thanks. Dim strFile As String Dim pics As ArrayList = New ArrayList ' Get image folder path on server - use "\" string if root
8
3212
by: Fabricio Sperandio | last post by:
Hi everyone, I am trying to generate some thumbnails using System.Drawing.Image Class. Actually the GetThumnailImage method. The question is: How can I get a better thumbnail picture? I mean, when the original size is big, for example, 800x600 and I generate a small picture (160x120) the quality is terrible for a jpeg and even orse for a gif. How can I get some better images? There is another class? There is some resolution propertie I...
1
9852
by: GrandpaB | last post by:
I am having difficulty implementing the GetThumbnailImage method. I have read the "Help" files on this method, but remain confused. My problem is understanding the last two parameters that the method requires. I don't understand the callback concept in genreal. What are the callback and callbackData parameters, how are they set up and how are they used? Dim MyImage As Image MyImage = Image.FromFile("C:\Chris6.jpg")
1
3057
by: Walt | last post by:
I am trying to use an Image control to get a thumbnail image with the following code: Private Sub GetThumbnail(ByVal img As Image, ByVal photo As Photo) ' Gets a thumbnail image from the file and sets the TnailFile property ' in the photo object. Dim tImg As Image Dim w As Integer = img.Width Dim h As Integer = img.Height
0
1888
by: billsahiker | last post by:
Does anyone know how to call GetthumbnailImage in VB6? I am posting this here because .NET is where most of the use of GDIPlus is found and many of you are/were VB6 folks. I registered the gdiplus.dll and gdipluswrapper.dll and am able to successfully use many of the GDI+ functions in VB6, but my call to GetthumbnailImage generates a "Bad DLL calling convention" error. Function GetThumbnailImage(thumbWidth As Long, thumbHeight As...
0
9620
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
10261
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
10104
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
10038
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
9912
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
8934
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
1
7460
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
5482
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
2
3609
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.