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File size and TIF problem


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Xpistiva

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Hello,
I have 2 big problems.

I have made something in Photoshop and I should save it in TIF. Thats the first problem. Since the file is more than 6 GB, it wouldnt save it as TIF, it says, it cant be more than 4 GB if I want to save it as TIF. How to fix that problem?
Then.. Again about the size. 6 GB is too big. And I need it in 50 MB max. How I can solve that?
(the file should be in 300 dpi, so thats not an option in this case)

Thank you so much for the help :)
 
Hi @Xpistiva

It would really help forum members help you if there were more details e.g.
Is this an RGB image and is it in 8 bit or 16 bit depth
What are the dimensions of the image/canvas for your project.
Are you saving Layers in this TIF file.
You indicated that the image in in 300 dpi yet what are the full pixel dimensions (or inches/cm at 300 dpi)
Note that even a 16 bit depth RGB image that is a single Layer would require an image over 31,000 pixels in both dimensions or something that is over 8 feet on a side at 300 dpi.

With this type of information we could narrow down on your options.
Just a suggestion on how to provided enough information so that good recommendations can be made for you by forum members.
John Wheeler
 
Hello,
Thanks for your answer.

Its CMYK and it should be.
The thing is, they wanna print out this pic.
They asked for CMYK, PDF or TIF, 300 dpi, max 50 MB, 505×239 cm (59648×28228 pixels)

Its on 8 bit.
I had 3 layers, but made them as 1, all together.
 
Well..
I could save it as TIF file now (when I did save it I choosed in ZIP so its TIF file and 1.95 GB).

How I can reduce the 1.95 GB to 50 MB or less..?! 🤔
 
Hi @Xpistiva
I would suggest that there is some error in the customer requirements.
To go from 6GB down to 50 MB is a compression factor of 120 and even when using a lossless compression of JPEG set to quality factor of 0 out of 12 you do not achieve that type of compression for a regular image. You might be able to get that compression yet only if the image has huge areas of single colors.

Also, the dimensions you mentions x for the project of 505cm x 239 cm is ~16.5 feet x 7.8ft
First I don't know of any printer that can print that size in one pass. Second, if the full image is that large one does not need 300 dpi because you only need that type of high resolution if one is viewing the image at 10 inches (which would be very odd for an image that large.

So as a first step I would double check that the dimensions they desired are mm and not cm. That would bring it back down to a size where 300 dpi makes sense.

If they really need an image that size
1) The image could be broken down into the size actual being printed (many pages fit together) and
2) I bet 300 dpi is not needed.

Thats the steps I would take and hope this helps.

John Wheeler
 
Well..
I dont know either why they want 300 dpi in this case. But they made sure this is an important thing to have it in 300 dpi. 😒

Im struggling with this and really so stressed about it. Finally I could save it as TIF as I wrote earlier.

But I dont know how to compress the file size to 50 MB... 7zip? Or how? 🤔
 
Hi @Xpistiva
Sorry about the extras stress you are having.
I still believe that my first suggestion would be the best yet if that is not an option you can consider, here are a few more ways to try. Not that after doing these steps you should check the quality of the image to make sure it meets the desired needs.

1) If saving in TIFF format, you can use the Save As approach and use the JPEG method of compression. Select the lowest level of quality which gives the highest compression level and should be better in compression than the ZIP option. Here is an image of that panel to choose these options:


Screen Shot 2023-06-15 at 7.15.10 AM.jpg


Check the resulting file size and see if that works.

You could also just try and save in the JPEG format directly and set the lowest quality level and here is the image of that panel (ignore the size result as I used a different image in creating this screenshot):

Screen Shot 2023-06-15 at 7.07.48 AM.jpg


If that is still not small enough there is another trick to add on for compression whether ZIP or JPEG

Before saving the image file, add 1 pixel of Box Blur (or gaussian blur). This trick allows the compression algorithms to do a better job and get you a smaller file size.

If one pixel blur does not reduce the final file size enough try 2 pixels of blur or more if needed.

Eventually I believe you will get the file size you want yet you need to check the quality of the image. It may be just fine for such a large image at 300 dpi.

Hope these additional approaches are helpful for you
John Wheeler
 
Thank you so so much for your help!
Im gonna try these and let see what results I can get. I will come back to let u know (Im just sleeping so soon, its very late night here and I had so much stress about this file and my brain is on zero now 😄)
 
Hey
I tried with the JPEG option (in TIF) as you showed me.
Well. Its much better but Im still not there 😄
Now its 268 MB!!!
 
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