Reducing JPG files ...
 

[Closed] Reducing JPG files sizes.. not how, but by how much..

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So my compact 10MP camera produces 5MB JPG picture files. I can email these, but want to reduce them down to something more realistic.
Though I still retain a decent picture for the recipient, unlike the 100KB jobbies usually sent through to me..

Any particular size would be optimal or do I pick an arbitrary figure?
Oh and any specific (cheap) software that does decent reductions, or do I stick to the std free stuff on my PC?


 
Posted : 19/11/2010 10:55 am
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depends what the recipient is going to do with them, really.

If it's just to show snapshots to mates etc then 800/600 or 1024/768 is probably enough.


 
Posted : 19/11/2010 11:01 am
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if you use hotmail you can now upload pics and just email people a link, btw, if you don't use photobucket or similar.


 
Posted : 19/11/2010 11:01 am
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lossless or lossy?
I'm in medical imaging, so quality is paramount and we use lossless compression (around 2.5:1) in the first instance. After a few years, the value of the images drops and we would have thrown out the hard copy images, but now we just apply a higher compression level, which can be as high as 50:1 (plain film imaging of broken bones)


 
Posted : 19/11/2010 11:15 am
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Have a look at [url= http://www.faststone.org/FSResizerDetail.htm ]Faststone Resizer[/url].

It depends on what you think the recipient will do with it. If it's just to view then 800pixels width and 80% image quality will do fine.

If you want them to zoom into them / print them then full size 85%.

Or somewhere in between.

If you drop image size set sharpening to +1 and you'll get a crisper result.


 
Posted : 19/11/2010 11:20 am
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Cheers for the replies.. very sad I've always used % drop, and not throught about piccing a image size.
Gone for 1600x1200 on a test batch (aprox 1mb each), as any photo's I recieve I'd at least expect to be able to print them out


 
Posted : 19/11/2010 11:40 am