Tiff larger than Raw file?

[Daniel]

I saved a RAW file as 8-bit TIFF file and VCDMF interpolation. The RAW is 25gb and the TIFF is 36gb. I thought TIFFs should be smaller than RAW files. Am I missing something?

Sorry if this was a duplicate, as I couldn't see my first attempted post in the list of posts.

Thanks. 

[Kirk Thibault]

A raw file is a single channel per pixel of high(er) bit data, whereas a TIFF, even at 8bpc, has to store 3 channels of data for each pixel (R, G and B values for each pixel).  TIFFs are typically larger than the corresponding raw file- the extent to which they are larger is usually a function of bit depth (8 versus 16 bpc, for example) and compression. 

Kirk

Sent from my iPhone

On Feb 12, 2021, at 20:18, Daniel <d.byk...@gmail.com> wrote:

I saved a RAW file as 8-bit TIFF file and VCDMF interpolation. The RAW is 25gb and the TIFF is 36gb. I thought TIFFs should be smaller than RAW files. Am I missing something?

Sorry if this was a duplicate, as I couldn't see my first attempted post in the list of posts.

Thanks. 

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[Daniel]

Thanks.