Computer Graphics with Photoshop - PSCS (not CS2) Opens Wrong File

Author

PSCS (not CS2) Opens Wrong File

One4All

2006-05-25, 3:20 am

On my Mac G5, running Panther OS, I have a folder of .jpg images,
derived from a CD of scanned .tif files. Some of these images I need to
reprocess in PSCS (not CS2). Taking one image as an example, it's an
800KB .jpg, but when I open it in PSCS, it opens as the .tif 34MB size.
As I'm not that adept with PSCS, I can't find which format PSCS is
using, but I suspect it's using .tif. But, where is that coming from?

I used Preview>File>Export to change from .tif to .jpg. I didn't change
the resolution, which Preview doesn't offer. Image>Image Size in PSCS
shows Resolution at the .tif resolution of 300 ppi. Could that be it? I
scanned this image @300 ppi, scaled to a certain .tif ouput size.

Can anyone tell me what's going on? Is it that PSCS is giving me the
..tif file as the best file for editing (which is true)? The only thing
I can't understand is where PSCS is finding the .tif file when the
folder that is opened is the folder with .jpg files. How can I get PSCS
to open the file as a .jpg?

BTW, there are no .tif files in any folders in the Finder. They're all
on CD's.

2006-05-25, 3:20 am

One4All

2006-05-25, 3:20 am

2 wrote:
> "One4All" <dwerner@bresnan.net> wrote in message
> news:1148526932.535588.141300@j55g2000cwa.googlegroups.com...
>
> Why are you writing to the Photoshop group?

Because I have a problem involving PSCS. I love these people who reduce
one's comments to a scale they can only relate to.

2006-05-25, 3:20 am

"One4All" <dwerner@bresnan.net> wrote in message
news:1148527994.929339.225810@j55g2000cwa.googlegroups.com...
>
> 2 wrote:
>
> Because I have a problem involving PSCS. I love these people who reduce
> one's comments to a scale they can only relate to.

Sorry. I misunderstood. You can use version numbers, too.

One4All

2006-05-25, 3:20 am

2 wrote:
> "One4All" <dwerner@bresnan.net> wrote in message
> news:1148527994.929339.225810@j55g2000cwa.googlegroups.com...
>
> Sorry. I misunderstood. You can use version numbers, too.

My understanding is that PSCS is Version 8. I'd appreciate knowing if
the problem I've described, earlier, may be due more to a version of PS
than to a generic problem.

Roy G

2006-05-25, 6:16 am

"One4All" <dwerner@bresnan.net> wrote in message
news:1148526932.535588.141300@j55g2000cwa.googlegroups.com...
> On my Mac G5, running Panther OS, I have a folder of .jpg images,
> derived from a CD of scanned .tif files. Some of these images I need to
> reprocess in PSCS (not CS2). Taking one image as an example, it's an
> 800KB .jpg, but when I open it in PSCS, it opens as the .tif 34MB size.
> As I'm not that adept with PSCS, I can't find which format PSCS is
> using, but I suspect it's using .tif. But, where is that coming from?
>
> I used Preview>File>Export to change from .tif to .jpg. I didn't change
> the resolution, which Preview doesn't offer. Image>Image Size in PSCS
> shows Resolution at the .tif resolution of 300 ppi. Could that be it? I
> scanned this image @300 ppi, scaled to a certain .tif ouput size.
>
> Can anyone tell me what's going on? Is it that PSCS is giving me the
> .tif file as the best file for editing (which is true)? The only thing
> I can't understand is where PSCS is finding the .tif file when the
> folder that is opened is the folder with .jpg files. How can I get PSCS
> to open the file as a .jpg?
>
> BTW, there are no .tif files in any folders in the Finder. They're all
> on CD's.

Hi.

It is a very long time since I used a Mac, so I am not sure what your
terminology mean.
I suspect "Preview", "Export" & "Finder" are Mac things.

If you want to change the File Type for an Image in Photoshop, ( any
version ), what you do is "File" - "Save As", select the new File Type from
the drop down list and then Click "Save".
So I really don't know what you did, or were trying to do, with "Preview,
File, Export".

An Image on screen is an Image, irrespective of what File Type it was
"Opened" from, or it is being "Saved" as. The Image is not being changed
in any way, only a different kind of storage File is being created.

Photoshop will open whichever file you ask it to, and that File will still
be the same File Type as it was, before it opened to an Image.
If you find that the opened Image came from a Tiff File, then it was a Tiff
File before you opened it, and it is still a Tiff File.
If it had ".jpg" as part of its name, then its name was wrong. The Image
is not a Tiff or a Jpeg, it is just an Image.

( I do remember Macs being a bit weird about File Names and Types. It was
claimed that PCs were inferior because they needed this "dot xxx" thing
stuck on the end of their file names, when Macs only needed the name. )

The difference in size could be due to compression.
An Image, (opened from a Jpeg File), will have the same number of pixels as
the original Image from which it was created.
The sizes will only be different when the Image Files (Jpg or Tiff) are
compared, and that is only File Sizes which are being compared.

Or it could be, that what you think is an image file is actually just a
"Shortcut" (PC terminology) to an image file.

Not really an answer, but it might help you to work out what is happening.

Roy G

Johan W. Elzenga

2006-05-25, 6:16 am

One4All <dwerner@bresnan.net> wrote:

> On my Mac G5, running Panther OS, I have a folder of .jpg images,
> derived from a CD of scanned .tif files. Some of these images I need to
> reprocess in PSCS (not CS2). Taking one image as an example, it's an
> 800KB .jpg, but when I open it in PSCS, it opens as the .tif 34MB size.
> As I'm not that adept with PSCS, I can't find which format PSCS is
> using, but I suspect it's using .tif. But, where is that coming from?
>
> I used Preview>File>Export to change from .tif to .jpg. I didn't change
> the resolution, which Preview doesn't offer. Image>Image Size in PSCS
> shows Resolution at the .tif resolution of 300 ppi. Could that be it? I
> scanned this image @300 ppi, scaled to a certain .tif ouput size.
>
> Can anyone tell me what's going on? Is it that PSCS is giving me the
> .tif file as the best file for editing (which is true)? The only thing
> I can't understand is where PSCS is finding the .tif file when the
> folder that is opened is the folder with .jpg files. How can I get PSCS
> to open the file as a .jpg?

JPG is a compressed format. Photoshop cannot open a file and leave it
compressed at the same time, because then you wouldn't be able to look
at the image or do anything with it. Consequently Photoshop decompresses
the JPG file upon opening it, and apparently that is 34 MB. This is
normal behavior, and it doesn't mean that Photoshop 'opened the image as
TIF'. TIF and JPG are file formats, once opened in Photoshop your image
doesn't have a file format (until you save it again in a the file format
of your choice).

--
Johan W. Elzenga johan<<at>>johanfoto.nl
Editor / Photographer http://www.johanfoto.nl

neon

2006-05-25, 6:17 pm

Johan W. Elzenga wrote:
> One4All <dwerner@bresnan.net> wrote:
>
>
>
>
> JPG is a compressed format. Photoshop cannot open a file and leave it
> compressed at the same time, because then you wouldn't be able to look
> at the image or do anything with it. Consequently Photoshop decompresses
> the JPG file upon opening it, and apparently that is 34 MB. This is
> normal behavior, and it doesn't mean that Photoshop 'opened the image as
> TIF'. TIF and JPG are file formats, once opened in Photoshop your image
> doesn't have a file format (until you save it again in a the file format
> of your choice).
>
>
your question is very confusing. first of all, there is no
preview>file>export command. at least not in current versions of
preview. second, what exactly do you mean by 'derived from a CD of
scanned .tif files'? did you simply copy the images, in .tif format,
from a CD to a folder on your harddrive? if so, they are still images
in .tif format. the folder the images were placed in is irrelevant with
respect to the file format. you can place any file in any folder. the
file format is indicated by the filename suffix at the end of the
filename (i.e. .jpg, .tif, .psd, etc.) you didn't mention the filename
suffix in your post. is it .jpg or .tif?
john's right about the file size. after photoshop decompresses the file
it can be much larger than the compressed file. and there are also at
least 3 compression options that can be applied to .tif files.
and the resolution doesn't have anything to do with file format. and
photoshop can't determine, on it's own, what file format you want to
use. if you want to open a file as a .jpg is has to be in .jpg format.
sounds to me like you have a .tif file in a folder you thought contained
only .jpg files.
hope this helps.

tacit

2006-05-25, 6:17 pm

In article <1148534440.018535.137760@i39g2000cwa.googlegroups.com>,
"One4All" <dwerner@bresnan.net> wrote:

> My understanding is that PSCS is Version 8. I'd appreciate knowing if
> the problem I've described, earlier, may be due more to a version of PS
> than to a generic problem.

You do not have a problem; everything is acting as it should.

Let us say you have a 34 MB image. You open it in Photoshop, and you
save it as a JPEG. The JPEG is, say, 2 MB.

Now you open that 2 MB JPEG in Photoshop. Photoshop says the image is 34
MB. How? What's going on? How can that be? How can the image be 2 MB on
disk but 34 MB in Photoshop?

JPEG is compressed. When you save an image in JPEG format, the size opf
the file on your disk is smaller than the size of the file when it is
decompressed.

When you open the file in Photoshop, it is decompressed. Photoshop shows
you the decompressed size of the file. The Finder shows you the
compressed size.

--
Art, photography, shareware, polyamory, literature, kink:
all at http://www.xeromag.com/franklin.html
Nanohazard, Geek shirts, and more: http://www.villaintees.com

One4All

2006-05-25, 6:17 pm

One4All wrote:
> On my Mac G5, running Panther OS, I have a folder of .jpg images,
> derived from a CD of scanned .tif files. Some of these images I need to
> reprocess in PSCS (not CS2). Taking one image as an example, it's an
> 800KB .jpg, but when I open it in PSCS, it opens as the .tif 34MB size.
> As I'm not that adept with PSCS, I can't find which format PSCS is
> using, but I suspect it's using .tif. But, where is that coming from?
>
> I used Preview>File>Export to change from .tif to .jpg. I didn't change
> the resolution, which Preview doesn't offer. Image>Image Size in PSCS
> shows Resolution at the .tif resolution of 300 ppi. Could that be it? I
> scanned this image @300 ppi, scaled to a certain .tif ouput size.
>
> Can anyone tell me what's going on? Is it that PSCS is giving me the
> .tif file as the best file for editing (which is true)? The only thing
> I can't understand is where PSCS is finding the .tif file when the
> folder that is opened is the folder with .jpg files. How can I get PSCS
> to open the file as a .jpg?

> BTW, there are no .tif files in any folders in the Finder. They're all
> on CD's.

First, thank you all for your expertise, and most importantly, the
willingness to spend the time to share it. Second, I posted to this
group because there was so little activity in the PS Mac group that I
thought I stood a better chance of getting a response, here.

Roy's reply confirmed what I was suspecting but didn't know what was
really going on. I appreciate his going into detail. That helped.

Johan's explanation of how PS decompresses a file and that a file
opened in PS doesn't have a file format until saved was an eye-opener,
altho I was aware PS opens files in its native .psd. I just didn't
connect the dots. (Pun not intended.)

Neon wrote:

>there is no preview>file>export command

What I meant was File>Export in the Preview application.

>what exactly do you mean by 'derived from a CD of
>scanned .tif files'? did you simply copy the images, in .tif format,
>from a CD to a folder on your harddrive?

Yes.

>if so, they are still images
>in .tif format. the folder the images were placed in is irrelevant with
>respect to the file format. you can place any file in any folder. the
>file format is indicated by the filename suffix at the end of the
>filename (i.e. .jpg, .tif, .psd, etc.) you didn't mention the filename
>suffix in your post. is it .jpg or .tif?

I knew that the files copied from the CD would be in .tif. I just used
Mac's Preview application to Export them in .jpg to a new folder. Under
the Kind column in the new folder, the files showed as JPEG Image, and
each file name has the .jpg extension, so I thought I had .jpg files.
The Size column confirms this.

>john's right about the file size. after photoshop decompresses the file it can be much larger than >the compressed file.

I'm sure the files are .jpg. I, too, think Johan is right. So. What I
need to do is process the files in PSCS and save them as .jpg's.
Correct me, if I'm wrong. I've learned a ton, here. Good thing you guys
don't charge. : ))

Jim

2006-05-25, 6:17 pm

Hunt

2006-05-25, 6:17 pm

In article <1148588544.808418.151570@i40g2000cwc.googlegroups.com>,
dwerner@bresnan.net says...
>
>
>One4All wrote:
[SNIP]
>First, thank you all for your expertise, and most importantly, the
>willingness to spend the time to share it. Second, I posted to this
>group because there was so little activity in the PS Mac group that I
>thought I stood a better chance of getting a response, here.
>
>Roy's reply confirmed what I was suspecting but didn't know what was
>really going on. I appreciate his going into detail. That helped.
>
>Johan's explanation of how PS decompresses a file and that a file
>opened in PS doesn't have a file format until saved was an eye-opener,
>altho I was aware PS opens files in its native .psd. I just didn't
>connect the dots. (Pun not intended.)
[SNIP]

One4All,

You posted to as good a group as there is (alt.graphics.apps.photoshop, being
another). As you indicate, you got the info needed. Also, I think you posted
all the data needed, PS ver # and OS, but that might have been missed in the
original post.

Some of us are not MAC-literate (myself definitely included), but, other than
a few OS-specific refs, the rest is X-platform.

Most of all, glad you got the info needed. One last caveat: PS will default to
saving the file (again) as PSD, especially if any work was done on it, and
more especially if you have Layers, or Alpha Channels, etc. That is becaue of
the nature of JPG compression - lossey and cumultive, kinda' like exposure in
film. You can, however, Save_As whatever format you wish, though you may have
to Delete Channels, Flatten Layers, etc.

Hunt

neon

2006-05-26, 6:17 pm

One4All

2006-05-26, 6:17 pm

neon wrote:
> One4All wrote:
> there is no file>export command in the preview application.

Yes, there is. I double-checked. It gives a selection of file formats
to Export in & when I select JPEG, I can click Options & select the
amount of compression I want.

> as a point of interest for the future there is an adobe user to user
> forum website for mac users that is an excellent resource for mac users.
> it's free and anyone with a web browser can use it. if you're using a
> mac you owe it to yourself to check it out.
>
> http://www.adobeforums.com/cgi-bin/...UmKpsz@.ee6b362

This is good advice & thank you.

neon

2006-05-27, 6:16 pm

One4All wrote:
> neon wrote:
>
>
>
> Yes, there is. I double-checked. It gives a selection of file formats
> to Export in & when I select JPEG, I can click Options & select the
> amount of compression I want.
>
>
>
>
> This is good advice & thank you.
>
i'm still confused. what version of preview are you using? i'm running
version 3.0.4 and there is no export command available anywhere.

tacit

2006-05-27, 6:16 pm

In article <ChWdg.2499$W97.727@twister.nyroc.rr.com>,
neon <bnenno@rochester.rr.com> wrote:

> i'm still confused. what version of preview are you using? i'm running
> version 3.0.4 and there is no export command available anywhere.

The Export command does not exist unless you buy QuickTime pro. If you
have not purchased QuickTime Pro, there's no Export command; if you
have, there is.

--
Art, photography, shareware, polyamory, literature, kink:
all at http://www.xeromag.com/franklin.html
Nanohazard, Geek shirts, and more: http://www.villaintees.com

One4All

2006-05-27, 6:16 pm

neon wrote:
> One4All wrote:
> i'm still confused. what version of preview are you using? i'm running
> version 3.0.4 and there is no export command available anywhere.

I have version 2.1.1. So, you can't export files from the newer
version? Seems odd, but you may be able to Export files from some
other, similar, app. BTW, my OS is 10.3.9, Panther. If you have Tiger,
the 10.4.x version of OS, then I think we're talking apples (no pun)
and oranges. I know nothing of Tiger's features.

neon

2006-05-28, 6:16 am

One4All wrote:
> neon wrote:
>
>
>
> I have version 2.1.1. So, you can't export files from the newer
> version? Seems odd, but you may be able to Export files from some
> other, similar, app. BTW, my OS is 10.3.9, Panther. If you have Tiger,
> the 10.4.x version of OS, then I think we're talking apples (no pun)
> and oranges. I know nothing of Tiger's features.
>
thanks for the info. obviously apple saw fit to drop export. and i'm
running os 10.4.5. thanks again.