PSCS (not CS2) Opens Wrong File

"One4All" wrote in message

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).

Why are you writing to the Photoshop group?

2 wrote:

"One4All" wrote in message

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).

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.

"One4All" wrote in message

2 wrote:

"One4All" wrote in message

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).

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.

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

2 wrote:

"One4All" wrote in message

2 wrote:

"One4All" wrote in message

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).

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.

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.

"One4All" wrote in message

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

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?

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

Johan W. Elzenga wrote:

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?

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.

In article ,
"One4All" 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 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. : ))

In article ,
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

"One4All" wrote in message

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.

Aren’t you looking at the image size as given by PS? If so, this is the amount of memory that the image uses. What the photo editing software does is decompress jpg files to load them into memory.
Jim

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.

to reiterate what i said in my earlier reply…there is no file>export command in the preview application. there is however a file>save as command that must be used to save an open image in a different format. i assume you misspoke when you said file>export? i am mac literate, just to be clear. sounds like you’ve got a handle on your situation now. 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/webx/?14@20.RT44gUmKpsz@. ee6b362

neon wrote:

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.

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/webx/?14@20.RT44gUmKpsz@. ee6b362

This is good advice & thank you.

One4All wrote:

neon wrote:

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.

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/webx/?14@20.RT44gUmKpsz@. ee6b362

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.

In article <ChWdg.2499$>,
neon 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

neon wrote:

One4All wrote:

neon wrote:

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.

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/webx/?14@20.RT44gUmKpsz@. ee6b362

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.

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.

One4All wrote:

neon wrote:

One4All wrote:

neon wrote:

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.

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/webx/?14@20.RT44gUmKpsz@. ee6b362

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.

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.