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378

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1
+1  Q: 

Resize an image with .NET without losing EXIF data

Hello,

What is the best way to resize images using .NET, without losing the EXIF data? I'm okay with using .NET 2 System.Drawing.* classes, WPF classes, or open-source libraries.

The only easy way I found to handle this all for now is to use the Graphics.FromImage (.NET 2) to perform the resizing and to re-write the EXIF data with an OpenSource library manually (each piece of data one by one).

+2  A: 

Your suggestion of extracting the EXIF data before resizing, and then re-inserting the EXIF data seems like a decent solution.

EXIF data can be defined only for formats like JPEG and TIFF - when you load such an image into a Graphics object for resizing, you're essentially converting the image to a regular bitmap. Hence, you lose the EXIF data.

Slightly related thread about EXIF extraction using C# here.

Charlie Salts  2009-08-05 01:32:55
Okay I kept my solution then, it's working quite well, it's just a lot of code for nothing but it's fast enough :)
TigrouMeow  2009-08-05 14:52:05
The only other alternative I know of is ImageMagick - I understand you can do transformations without losing EXIF data but that library is essentially doing the same thing you're already doing, just likely faster.
Charlie Salts  2009-08-06 01:52:32

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