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help with rotation issue

 
 
laj
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      09-12-2005
Hi,
when I import my dig picts from canon rebel dig via cf reader the
portraits are automatically turned upright in photoshop and bridge.
But they remain sideways in explorer and thus also in the photo slide
program i send them too.

Whats the best way to automate a whole folder to turn 90deg? I trided
an action in photoshop cs2 but it keeps stopping at the jpeg
compression 'ok' step for each.

Thanks,
Jack
 
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BD
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      09-12-2005
I'd use ACDSEE (select a group of files and select Tools / JPEG
Rotate)...

But I'm sure that th Photoshop you could create an Action and apply it
to the whole folder.

I don't use Irfanview personally, but I would expect it would have the
same functionality, and it's free.

 
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Gene Palmiter
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      09-12-2005
You don't want to do this! If you rotate them all you will resave as a JPG
and that degrades them...then if you edit them they degrade again.

The reason that Photoshop and bridge show them rotated is that they just
remember that you want them rotated...they don't actually do it.

I have heard that some programs can rotate without loss...don't know which
ones.

In bridge you can select all that you want rotated and mark them and
rotate...Photoshop will load them rotated.

--
Thanks,
Gene Palmiter
(visit my photo gallery at http://palmiter.dotphoto.com)
freebridge design group
www.route611.com & Route 611 Magazine
"laj" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hi,
> when I import my dig picts from canon rebel dig via cf reader the
> portraits are automatically turned upright in photoshop and bridge.
> But they remain sideways in explorer and thus also in the photo slide
> program i send them too.
>
> Whats the best way to automate a whole folder to turn 90deg? I trided
> an action in photoshop cs2 but it keeps stopping at the jpeg
> compression 'ok' step for each.
>
> Thanks,
> Jack



 
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BD
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      09-12-2005
Interesting; I wasn't aware that ACDSee rotate was lossy; I thought it
just remapped each pixel in the image to the new orientation.

 
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Frank ess
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      09-12-2005
Gene Palmiter wrote:
> You don't want to do this! If you rotate them all you will resave as
> a JPG and that degrades them...then if you edit them they degrade
> again.
> The reason that Photoshop and bridge show them rotated is that they
> just remember that you want them rotated...they don't actually do
> it.
>
> I have heard that some programs can rotate without loss...don't know
> which ones.
>
> In bridge you can select all that you want rotated and mark them and
> rotate...Photoshop will load them rotated.
>


Look under "Options" in Irfanview.



>> Hi,
>> when I import my dig picts from canon rebel dig via cf reader the
>> portraits are automatically turned upright in photoshop and bridge.
>> But they remain sideways in explorer and thus also in the photo
>> slide
>> program i send them too.
>>
>> Whats the best way to automate a whole folder to turn 90deg? I
>> trided
>> an action in photoshop cs2 but it keeps stopping at the jpeg
>> compression 'ok' step for each.
>>
>> Thanks,
>> Jack



 
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laj
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Posts: n/a
 
      09-12-2005
thanks, i read somewhere here that canons zoombrowser that came with
my camera does this losslessly. Since I already had it installed i
tried it and it seems to work fine. Not sure is degraded? grossly
looks ok.
 
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Dave Martindale
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      09-13-2005
"BD" <(E-Mail Removed)> writes:
>Interesting; I wasn't aware that ACDSee rotate was lossy; I thought it
>just remapped each pixel in the image to the new orientation.


With something like a TIF image file, reading and rotating it in an
ordinary image editor (and ACDSee is probably the same) is lossless.
But JPEG images are lossily compressed, and the image file doesn't
contain individual pixels, just coefficients that can be used to
reconstruct an approximation to the original image. Rotating a JPEG
image with a normal editor means decompressing it into a bitmap,
rotating the bitmap, and then lossily compressing it again. This loses
some information.

To avoid this, there are specialized JPEG rotation functions in some
programs (like Irfanview). These work by rotating the compressed
coefficients, without ever decompressing or recompressing. Thus, there
is no (additional) loss.

Dave
 
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David J Taylor
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      09-13-2005
Gene Palmiter wrote:
[]
> I have heard that some programs can rotate without loss...don't know
> which ones.


Picture Information Extractor (PIE):
http://www.picmeta.com/

Paint Shop Pro (in certain modes):
http://www.corel.com/

JPEGcrop (I think):
http://sylvana.net/jpegcrop/

David


 
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Keith Sheppard
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      09-14-2005
>>> I have heard that some programs can rotate without loss...don't know
>>> which ones.

>>
>>Picture Information Extractor (PIE):
>> http://www.picmeta.com/
>>
>>Paint Shop Pro (in certain modes):
>> http://www.corel.com/
>>
>>JPEGcrop (I think):
>> http://sylvana.net/jpegcrop/
>>
>>David


And my own (free) PhotoMan
(http://homepages.tesco.net/~Keith.Sh...oman/home.htm). Frankly I
think it's pretty disgraceful that there are packages around which _don't_
do lossless rotation.

Keith



 
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Chris
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      09-16-2005
With XP you can select all, right click on them and choose rotate CW
or CCW.

On Mon, 12 Sep 2005 10:15:27 -0700, laj <(E-Mail Removed)> wrote:

>Hi,
>when I import my dig picts from canon rebel dig via cf reader the
>portraits are automatically turned upright in photoshop and bridge.
>But they remain sideways in explorer and thus also in the photo slide
>program i send them too.
>
>Whats the best way to automate a whole folder to turn 90deg? I trided
>an action in photoshop cs2 but it keeps stopping at the jpeg
>compression 'ok' step for each.
>
>Thanks,
>Jack

 
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