GIMP vs Photoshop , Image Size

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Wed, 12 October 2005 23:07 Go to next message
stevei_h (Photoshop begginer)
I resised a 1.4M tiff image into jpeg using both GIMP 2.2 and Photoshop
Element 4. The GIMP resized image was only 10k whereas the Photoshop
resized image was 50k...thats quite a difference..is GIMP using a
better compression algorithm?
TIA
steve
Wed, 12 October 2005 23:55 Go to previous messageGo to next message
Jim Townsend (Photoshop begginer)
stevei_h@yahoo.com wrote:

> I resised a 1.4M tiff image into jpeg using both GIMP 2.2 and Photoshop
> Element 4. The GIMP resized image was only 10k whereas the Photoshop
> resized image was 50k...thats quite a difference..is GIMP using a
> better compression algorithm?

The GIMP could have used more compression. When you choose
'Save As' under GIMP, you should be presented with a 'quality slider'
on the save as dialog box.

I think GIMP defaults to a level of 85.. If you use the slider
to increase the value, the resulting images will have larger file
sizes.
Thu, 13 October 2005 07:05 Go to previous messageGo to next message
edjh (Photoshop expert)
stevei_h@yahoo.com wrote:
> I resised a 1.4M tiff image into jpeg using both GIMP 2.2 and Photoshop
> Element 4. The GIMP resized image was only 10k whereas the Photoshop
> resized image was 50k...thats quite a difference..is GIMP using a
> better compression algorithm?
> TIA
> steve
>
Use Save for Web in Photoshop.

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Thu, 13 October 2005 15:44 Go to previous messageGo to next message
Branko Collin (Photoshop begginer)
stevei_h@yahoo.com, you wrote on 12 Oct 2005 20:07:41 -0700:

>I resised a 1.4M tiff image into jpeg using both GIMP 2.2 and Photoshop
>Element 4. The GIMP resized image was only 10k whereas the Photoshop
>resized image was 50k...thats quite a difference..is GIMP using a
>better compression algorithm?

In this case you used a better compression ratio.


--
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Fri, 14 October 2005 10:50 Go to previous message
Tacit[1] (Photoshop expert)
In article <1129172861.390922.238760@g14g2000cwa.googlegroups.com>,
stevei_h@yahoo.com wrote:

> I resised a 1.4M tiff image into jpeg using both GIMP 2.2 and Photoshop
> Element 4. The GIMP resized image was only 10k whereas the Photoshop
> resized image was 50k...thats quite a difference..is GIMP using a
> better compression algorithm?

JPEG is JPEG is JPEG; they both use the same compression algorithm. Most
likely, you told GIMP to use greater compression, which means a
poorer-quality image. (JPEG is "lossy" compression. The quality of your
image is deliberately degraded in order to make the file smaller.)

This assumes, of course, that you used Photoshop's Save for Web command
to save the JPEG. If you used Save As, the Photoshop image will be
larger on disk because by default Photoshop includes extra information
in the file, such as a custom icon, a preview, a color profile, and so
on.

--
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