TIFF supports multiple pages, right?
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I'm almost sure it does but I'm too lazy to look it up.
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@Gribnit it does. badly. well, all the things i've used supports badly, YMMV.
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@Gribnit Yes it does. However how well it is supported is another thing.
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@Gribnit said in TIFF supports multiple pages, right?:
I'm almost sure it does but I'm too lazy to look it up.
Yes. They are called multi-page TIFFS. I had no complaints when I made an application that created and displayed them.
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@Gribnit said in TIFF supports multiple pages, right?:
I'm almost sure it does but I'm too lazy to look it up.
No, but they have at least 28 screens.
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Yes.
And don't expect image viewers to actually show you anything beyond the first page.
Some are even inconsistently rendering either only the first, or all pages.
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@Carnage said in TIFF supports multiple pages, right?:
And don't expect image viewers to actually show you anything beyond the first page.
It seems even Photoshop doesn’t, but macOS Preview does. Interestingly, it even creates them: I tried opening a PDF and saving it as a TIFF, and in the Finder the file icon just shows the first page, as does Quick Look, so you get the impression it’s just a regular image, but opening it again in Preview, it does show all the PDF file’s pages as bitmaps:
Opening the same TIFF in Photoshop causes a some
ery, though:
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@Gurth I approve of that document!
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@Gurth said in TIFF supports multiple pages, right?:
Opening the same TIFF in Photoshop causes a some
ery, though:Did it open the pages as layers? You might only be seeing the topmost
pagelayer.
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@Lorne-Kates said in TIFF supports multiple pages, right?:
@Gribnit said in TIFF supports multiple pages, right?:
I'm almost sure it does but I'm too lazy to look it up.
No, but they have at least 28 screens.
I'm not in Canada, that doesn't exist.
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@anotherusername said in TIFF supports multiple pages, right?:
Did it open the pages as layers? You might only be seeing the topmost
pagelayer.Nope:
But did you notice how Photoshop makes about a third of the image transparent where the original isn’t?
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@dkf said in TIFF supports multiple pages, right?:
@Gurth I approve of that document!
I kind of wish I still had the hardware it’s for …
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@Gurth said in TIFF supports multiple pages, right?:
@anotherusername said in TIFF supports multiple pages, right?:
Did it open the pages as layers? You might only be seeing the topmost
pagelayer.Nope:
But did you notice how Photoshop makes about a third of the image transparent where the original isn’t?
I did notice that, but my assumption was that maybe it was the size of the largest page in the TIFF.
...the fact that it only loaded the first page does kinda throw a kink in that idea...
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@Gurth ...oh, I just noticed that it actually removed information... initially I just thought that it padded the page with transparent pixels, but it actually made part of it transparent and removed the edge...
I wonder if you removed the transparency, whether the pixels would still be there...
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@anotherusername said in TIFF supports multiple pages, right?:
@Gurth ...oh, I just noticed that it actually removed information... initially I just thought that it padded the page with transparent pixels
I’ll grant you that it’s not absolutely immediately obvious.
but it actually made part of it transparent and removed the edge...
I tried it with another PDF before this one, and Photoshop not only made more or less that same area transparent in that, but also threw in a couple of brightly coloured bars and things in a few places in the otherwise transparent part. I remember one was bright green, in a document that was entirely black text on white pages as a PDF.
I wonder if you removed the transparency, whether the pixels would still be there...
It’s not a layer mask, as the screenshot of the layers window shows, so I doubt it’s possible to remove the transparency and get the pixels back — even though they are there in the file, as the Preview screenshot shows.
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@Gurth said in TIFF supports multiple pages, right?:
It’s not a layer mask, as the screenshot of the layers window shows, so I doubt it’s possible to remove the transparency and get the pixels back — even though they are there in the file, as the Preview screenshot shows.
Transparent pixels can still have a color, though. Layer->Layer Mask->From Transparency. This will transfer the opacity to a layer mask. Then you can delete the layer mask, leaving all the pixels opaque and revealing what colors they really had.
The question is, when it loaded the image with whatever buggy code it used, whether it really zeroed out those pixels completely (replacing them with a solid background), or whether it just zeroed out the alpha channel.
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@anotherusername Also depends, is it a photoshop bug or some form of content scrambling in the TIFF?
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@anotherusername said in TIFF supports multiple pages, right?:
Transparent pixels can still have a color, though.
I know what you mean, but it stills sounds like a riddle. Like "if a tree falls in the forest...".
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@Tsaukpaetra RGBA stores the full 24-bit (typically) RGB color, even if the alpha is 0.
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@anotherusername said in TIFF supports multiple pages, right?:
@Gurth said in TIFF supports multiple pages, right?:
It’s not a layer mask, as the screenshot of the layers window shows, so I doubt it’s possible to remove the transparency and get the pixels back — even though they are there in the file, as the Preview screenshot shows.
Transparent pixels can still have a color, though. Layer->Layer Mask->From Transparency.
You’re right, I forgot about that. It gets even more interesting when I do that and disable the layer mask:
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@PleegWat said in TIFF supports multiple pages, right?:
@anotherusername Also depends, is it a photoshop bug or some form of content scrambling in the TIFF?
Going by some posts on websites I read because of this thread, Photoshop doesn’t handle multipage TIFFs at all well. Preview apparently does, but then again, you’d kind of expect it to open a multipage TIFF just fine if it created the file itself in the first place.
I thought I’d open the file in GIMP to see what that makes of it, but the rather elderly version I had crashed on opening (and seems to have taken InDesign with it!) so I’m downloading a new one first. That done, I’m now waiting for it to start up, which seems to take longer than Photoshop, but at least I can look at a picture of mushrooms while it loads
Oh, and when the progress bar is full, it starts again at the beginning, but goes through more stuff more quickly. (As an aside: great idea to put the version number in the program’s name, GIMP folks … just in case I want 2.8, 2.9, 2.10, etc. all on my system at the same time, I suppose.)Right … all that done, it seems GIMP has no problems with multipage TIFFs. It pops up a window that shows all the pages in the file and asks which you want to see, and whether to open them as layers or as separate images:
If I tell it to open the first page, it shows the whole image just fine:
My idea is that Photoshop’s import of these kinds of files is buggy, and if you need to work with them, if you’re on a Mac just use Preview, and on any other system, use GIMP.
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@Gurth FWIW, I used IrfanView the last time I had to split a multipage TIFF. (It was years ago.)
Hopefully nothing important is making them nowadays.
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@Parody scanners, maybe.
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@Parody said in TIFF supports multiple pages, right?:
@Gurth FWIW, I used IrfanView the last time I had to split a multipage TIFF.
That’s just because Windows doesn’t come with a good all-purpose image viewer :)
Hopefully nothing important is making them nowadays.
I gather some scanner software (or maybe firmware) does, if you scan multiple regions at once.
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There's probably like 7 people still creating these instead of using PDF.
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@loopback0 said in TIFF supports multiple pages, right?:
There's probably like 7 people still creating these instead of using PDF.
It can be an issue for dealing with old files, though, from a time and place when multipage TIFFs were common.
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I think some scanning software used to create them.
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I got a 40 bit per pixel TIFF file recently. I never knew those existed.
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@Zerosquare Windows Fax and Scan does. In fact, IIRC it's the default setting unless you change it off to JPG or something.
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@loopback0 said in TIFF supports multiple pages, right?:
There's probably like 7 people still creating these instead of using PDF.
I recently had to write a PDF/A->TIFF converter for a secure location that was very anal about authorized libraries. Such great fun.
The reason being that while they had swapped over to using PDF/A as an archive format from TIFF a couple of years ago, all systems could not store PDF/A and only accepted TIFF.
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@loopback0
We just finished switching our customers from tiff to pdf this summer.
Scan + ocr + linking the stuff in several applications is now all done with pdfs
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@Luhmann said in TIFF supports multiple pages, right?:
@loopback0
We just finished switching our customers from tiff to pdf this summer.
Scan + ocr + linking the stuff in several applications is now all done with pdfswhy archive data when you can archive a fun little program and the data, right on
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So am I a horrible person for exporting an image as a tiff this morning to be printed?
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@kazitor Yes, images should always be exported as .docx.
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@pie_flavor said in TIFF supports multiple pages, right?:
@kazitor Yes, images should always be exported as .docx.
Realistically, there's not any other way to get a picture than to print it, photograph it on a wooden table and paste the resulting file into a word document
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@Jaloopa But see, I did print it. But exported to tiff was an intermediate step.
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@kazitor said in TIFF supports multiple pages, right?:
So am I a horrible person for exporting an image as a tiff this morning to be printed?
Depends. If you made a multipage TIFF and sent it to someone else for printing, and you could reasonably expect that other person to not use something like Preview, Gimp or Irfanview to open it, then you might be.
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@pie_flavor said in TIFF supports multiple pages, right?:
@kazitor Yes, images should always be exported as .
docxxlsx, with the cells shaded from the image.FTFY
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@Gurth Then I can rest easy in the knowledge that it was just a single 8R picture.
TIFF - Wikipedia
