[vox-tech] Removing metadata from JPEGs (was re: Removing mega-data from jpgs)

2011-10-03 Thread Bill Kendrick 
On Mon, Oct 03, 2011 at 03:43:44PM -0700, Tony Cratz wrote:
> Hello,
> 
>   I have been working with one of my authors getting ready to
>   publish another E-book for him.
> 
>   This time we will be including 6 images at the start of each
>   chapter. He asked if a person could get any mega-data from the
>   images if they were to extract the images from the E-book
>   format (such as from a EPUB file).

I'm assumin so, since I imagine the JPEGs would just be stored within the
ZIP that is an EPUB as-is.  Though I suppose it depends on your workflow.
*shrug*

In any case, the term you guys are looking for is "metadata", not
'mega data" :^D

Google [1] says you can use ImageMagick "mogrify -strip imagename.jpg" [2]
or something I hadn't heard of before: "jhead -purejpg /path/to/image.jpg" [3],
for example.

[1] http://www.google.com/search?q=remove+metadata+jpg+linux
[2] http://hacktux.com/read/remove/exif
[3] 
http://blog.techfun.org/2009/11/how-to-remove-exif-data-from-jpeg-files-in-ubuntu/

Good luck!

-bill!
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Re: [vox-tech] Removing metadata from JPEGs (was re: Removing mega-data from jpgs)

2011-10-03 Thread Tony Cratz 
On 10/03/2011 03:56 PM, Bill Kendrick wrote:
> Google [1] says you can use ImageMagick "mogrify -strip imagename.jpg" [2]
> or something I hadn't heard of before: "jhead -purejpg /path/to/image.jpg" 
> [3],
> for example.

After install 'jhead' I did that command. And it worked great.

Another thing which is nice about removing the megadata from
the file is it reduces the total size of the file and then the
total size of the doc file.

Seems that some company by the name of Smashwords  has
a total size limit they will accept for an E-book.

I can see in the future where this limit could be hit for heavy
picture base books.

Thanks for your help Bill.


Tony
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