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Tiff file size issue

Community Beginner ,
Aug 20, 2020

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Hi all.

Ive recently been getting space warnings so went looking at what is useing it.  What i found is strange and im hoping someone can help.

Open a raw file from LR into PS and it shows as about 119meg at the bottom of PS screen.  Save the file as a tiff with no compression and its 119meg.  save with compression and its 139meg.  nothing was done to the image other than open it.  Now take same raw and open direct to PS and save its 59meg and compressed 39meg.  What is going on.  So now i have hundreds of files at approx 119meg going back to 2018.  even open one up in PS and save wont change its size.  In one folder i have 10 tiffs all different images with different amount of changes etc and even some as mono. All are 119.8meg

Can anyone help?

Thanks

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Tiff file size issue

Community Beginner ,
Aug 20, 2020

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Hi all.

Ive recently been getting space warnings so went looking at what is useing it.  What i found is strange and im hoping someone can help.

Open a raw file from LR into PS and it shows as about 119meg at the bottom of PS screen.  Save the file as a tiff with no compression and its 119meg.  save with compression and its 139meg.  nothing was done to the image other than open it.  Now take same raw and open direct to PS and save its 59meg and compressed 39meg.  What is going on.  So now i have hundreds of files at approx 119meg going back to 2018.  even open one up in PS and save wont change its size.  In one folder i have 10 tiffs all different images with different amount of changes etc and even some as mono. All are 119.8meg

Can anyone help?

Thanks

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Problem or error

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Aug 20, 2020 0
Adobe Community Professional ,
Aug 20, 2020

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What compression settings are you using?

Kevin Stohlmeyer Adobe Community Professional/Adobe Certified Instructor

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Aug 20, 2020 1
LEGEND ,
Aug 20, 2020

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Please provide an actual file or at least meaningful information – pixel dimensions, color mode, bit depth, tiff options, …

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Aug 20, 2020 0
Community Beginner ,
Aug 20, 2020

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Hi

The file is 3648x5472 raw from canon 6d.  Opened from LR into PS and no work done just save as tiff.

With compression set to none. interleaved and macintosh (defaults on mine) set file is 119.8meg

with compression set to lzw and rest left same file is 152meg

Same raw that LR used but right click open with PS and do the same save i get 59meg no compression and 32meg compressed.

And just as im checking the colour mode and bit think ive seen it.  open direct in PS and its 8bit.  opened via LR and its 16bit.  So a setting in LR by looks of it.

So any way to bulk change hundreds of files to 8bit without opening each one?

 

Thanks

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Aug 20, 2020 0
LEGEND ,
Aug 20, 2020

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»So any way to bulk change hundreds of files to 8bit without opening each one?«

That’s not what Photoshop is for, but there are other applications that might be able to do that. 

 

I think I remember reading about an issue with LZW-compression and 16bit images that causes a size-increase. 

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Aug 20, 2020 0
LEGEND ,
Aug 20, 2020

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Aug 20, 2020 0
Community Beginner ,
Aug 20, 2020

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hi,  

i agree ps is not for that.  I did mead other/3rd party software but was not clear sorry.  thanks for the link though

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Aug 20, 2020 1
LEGEND ,
Aug 20, 2020

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I never used it myself but I think I read a while back that Imagemagick is useful for bulk-converting … 

https://imagemagick.org/index.php

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Aug 20, 2020 0