hi

I just wrote a doc on saving images for the web using gimp. I was wondering if anyone could read it and send me feedback?

http://en.flossmanuals.net/bin/view/Gimp/OptimisingImagesForWeb

adam

hi

I just wrote a doc on saving images for the web using gimp. I was wondering if anyone could read it and send me feedback?

http://en.flossmanuals.net/bin/view/Gimp/OptimisingImagesForWeb

In 2.4 the properties are found at Image->Image->Image properties which is a change from the 2.2.x Image->View->Info window

Owen

Hello Adam,

I just wrote a doc on saving images for the web using gimp. I was wondering if anyone could read it and send me feedback?

http://en.flossmanuals.net/bin/view/Gimp/OptimisingImagesForWeb

At start I was thinking "wow, that is very detailed!" but when you get to jpeg you loose your breath.

In section about jpeg I would suggest to adding some info about color subsampling [1, 2]. This option have big impact on quality and file size.

You should also mention EXIF data, they take some space and are not necessary when considering bandwidth.

There are also other options which worth mentioning...

Default compression level with default subsampling will produce images with visible compression artefact. Especially when saving non-photo images, like graphics with tiny red text on white.

[1] http://en.wikipedia.org/wiki/Chroma_subsampling [2] http://photo.net/learn/jpeg/

In case of PNG worth mentioning that MSIE6 have troubles displaying transparent images. I've no idea if version 7 fixed this problem.

Best regards

ooo..good feedback...thanks!!!

On Tue, 2007-09-18 at 14:04 +0200, Jan Tomasek wrote:

Hello Adam,

I just wrote a doc on saving images for the web using gimp. I was wondering if anyone could read it and send me feedback?

http://en.flossmanuals.net/bin/view/Gimp/OptimisingImagesForWeb

At start I was thinking "wow, that is very detailed!" but when you get to jpeg you loose your breath.

In section about jpeg I would suggest to adding some info about color subsampling [1, 2]. This option have big impact on quality and file size.

You should also mention EXIF data, they take some space and are not necessary when considering bandwidth.

There are also other options which worth mentioning...

Default compression level with default subsampling will produce images with visible compression artefact. Especially when saving non-photo images, like graphics with tiny red text on white.

[1] http://en.wikipedia.org/wiki/Chroma_subsampling [2] http://photo.net/learn/jpeg/

In case of PNG worth mentioning that MSIE6 have troubles displaying transparent images. I've no idea if version 7 fixed this problem.

Best regards

On Tuesday 18 September 2007, adam hyde wrote:

hi

I just wrote a doc on saving images for the web using gimp. I was wondering if anyone could read it and send me feedback?

http://en.flossmanuals.net/bin/view/Gimp/OptimisingImagesForWeb

adam

And one more thing about saving to jpg. Actually you can see the quality of picture before saving. Just tick "Show preview in image window" and you can change quality in real-time mode. And you can see the size changeind dynamically too. This is very good feature in Gimp. It is better to set the worst picture's quality and gradually increase it, while watching canges in preview window. It is clearly seen, when quality of picture stops getting better at some point. You're done then - click save. It depends on picture's nature. Sometimes you can save big pictures, while setting quality as low as 40. And one more trick - in Advanced options unmark create prieview image. It does nothing good while being on web, just taking precious place and bandwidth.

I am not qualified to comment on the actual topic in question...however, you do have a sentence near the bottom that seems, at the very least, somewhat awkward. I can't quite figure out what it is trying to say. It almost seems as if it were somehow constructed from two separate sentences that were talking about two different things.

The sentence is:

"It is not displayed by some softwares can access this information."

It is in the section about Save Creation Time.

_____________________________________

"by" --> "but" :)

-----Original Message-----
From: gimp-user-bounces@lists.xcf.berkeley.edu [mailto:gimp-user-bounces@lists.xcf.berkeley.edu] On Behalf Of Elwin Estle
Sent: mardi 18 septembre 2007 16:18
To: gimp-user@lists.xcf.berkeley.edu Subject: Re: [Gimp-user] can someone check this doc for me?

I am not qualified to comment on the actual topic in question...however, you do have a sentence near the bottom that seems, at the very least, somewhat awkward. I can't quite figure out what it is trying to say. It almost seems as if it were somehow constructed from two separate sentences that were talking about two different things.

The sentence is:

"It is not displayed by some softwares can access this information."

It is in the section about Save Creation Time.

_______________

adam hyde wrote:

Thanks to everyone for the great feedback. I made some adjustments (http://en.flossmanuals.net/bin/view/Gimp/OptimisingImagesForWeb), but I still need to write something about the 'advanced' options in the JPEG window (if anyone wishes too they can create an account and add an explanation to that file...)

There was recently a thread on this list on the subject of 'jpeg compression levels' to which Raphaël Quinet replied with a bookful of info.

You should be able to find it.

Andrew

Thanks to everyone for the great feedback. I made some adjustments (http://en.flossmanuals.net/bin/view/Gimp/OptimisingImagesForWeb), but I still need to write something about the 'advanced' options in the JPEG window (if anyone wishes too they can create an account and add an explanation to that file...)

I am also working on an explanation of Cropping : http://en.flossmanuals.net/bin/view/Gimp/Cropping

does anyone have a good one liner for explaing both 'pc' and 'pt' as units of measurement?

adam

On Tue, 2007-09-18 at 16:25 +0200, Lars Ruoff wrote:

"by" --> "but" :)

-----Original Message-----
From: gimp-user-bounces@lists.xcf.berkeley.edu [mailto:gimp-user-bounces@lists.xcf.berkeley.edu] On Behalf Of Elwin Estle
Sent: mardi 18 septembre 2007 16:18
To: gimp-user@lists.xcf.berkeley.edu Subject: Re: [Gimp-user] can someone check this doc for me?

I am not qualified to comment on the actual topic in question...however, you do have a sentence near the bottom that seems, at the very least, somewhat awkward. I can't quite figure out what it is trying to say. It almost seems as if it were somehow constructed from two separate sentences that were talking about two different things.

The sentence is:

"It is not displayed by some softwares can access this information."

It is in the section about Save Creation Time.

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