Image saving compression for GPRS.

[ink]

Hi all,

I have built a signature control that works fine and we have been using it
for about 2 years now.
It is in CF2.0 and used on Windows Mobile 5 devices.

The problem that I am having is that the image size is not the smallest that
it can be. So I am trying to find a way of compressing the image down in
size cos they need to be sent over GPRS.

The same signature saved in different formats gives the following sizes
BMP(55.3K) , GIF(1.3K) , PNG(1.2K) , JPEG (2.8K)

One way to shrink it down would be to change the image to Black and White (1
bit per pixel) only and then save it. But I cant seem to find out how to do
this. I have been looking into System.Drawing.Imaging.PixelFormat With no
luck.

Is there any other way of compressing the image. I know that on the desk top
I can get the size down buy one third at least buy changing to 1 Bit per
pixel.
And I am not to bothered about the quality.

Thanks,
ink

 

[Bob Powell [MVP]]

Have a look at my site. There is code there to do 1bpp indexed images.


--
Bob Powell [MVP]
Visual C#, System.Drawing

Ramuseco Limited .NET consulting
http://www.ramuseco.com

Find great Windows Forms articles in Windows Forms Tips and Tricks
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[ink]

Thanks for getting back to me but which site? there is no link.

 

[Chris Tacke, eMVP]

There were several links in his signature.


--

Chris Tacke, Embedded MVP
OpenNETCF Consulting
Giving back to the embedded community
http://community.OpenNETCF.com

 

[ink]

Thnaks guys

There were several links in his signature.


--

Chris Tacke, Embedded MVP
OpenNETCF Consulting
Giving back to the embedded community
http://community.OpenNETCF.com