Tiff files

[cybergools]

when I shoot in Raw and process to Jpeg the file size decrease anything upto 50% eg 15mb raw file down to 7mb, If i export (in Lightroom) my file and convert to Tiff file, the file size increase anything from 25mb to 40mb.....why is that then?

thanks

 

[redddraggon]

Tiff is 16bit, Raw files are 12 or 14bit, and Jpegs are 8bit

 

[cybergools]

what would be advantage of using tiff files?
thanks

 

[stu_the_flat]

Scientists like tiff files as they can upload them directly into any image analysis programs they use with out having Photoshop or any other program they are not familiar with tamper with the image.

 

[cybergools]

Scientists like tiff files as they can upload them directly into any image analysis programs they use with out having Photoshop or any other program they are not familiar with tamper with the image.

how would that benefit the average tog?

 

[stu_the_flat]

how would that benefit the average tog?

It wouldn't. its only usful if you are hyper parniod about sharpening/noise reduction algorithims being run with out your knowledge.

But 99.99% users want pretty pictures, so shoot RAW or Jpg

Stuart

 

[Steelmagnet]

Tiff files are a good option for images files when you really don't want any kind of compression or any kind of bitrate reduction.

For example, a very subtly graduated sky can show up the limitations of a .jpg file.

If I'm preparing anything to send to my printers, I give them tiffs and they're very happy to receive them.

 

[cybergools]

Also if your file sizes increase from say 15mb raw to 30mb Tiff are you not adding extra to bulk up to this size??

 

[ZoneV]

Both RAW and JPEG file formats use compression. RAW is lossless (meaning there is no loss in quality) whereas JPEG is a "lossy" format, meaning some quality is lost.

TIFF is typically an uncompressed file format which is why TIFF files are relatively larger than similar RAW and JPEG files.

 

[onona]

Tiff files are a good option for images files when you really don't want any kind of compression or any kind of bitrate reduction.

This. TIFF is a better quality image than a JPG due to the fact that it can be saved uncompressed and can also be coded at a higher bitrate, which retains a higher range of tones without clipping them. Depending on your needs, TIFF may be overkill, but it's a standard in any high end imaging industry.

 

[Noah_]

My college lecturer used to advise us to save our portfolio work in .TIFF so as not to lose quality during JPEG compression. Depends on the purpose of the photographs whether working with .TIFF files is suitable I guess.

 

[AJQS]

Also if your file sizes increase from say 15mb raw to 30mb Tiff are you not adding extra to bulk up to this size??

No - bits are the samllest piece of computer data, a 0 or a 1. 8 bit files use 8 0s or 1s to define what's in 1 pixel. 16 Bit files use 16 0s and 1s to define the same pixel in greater detail , so you get twice the file size. Jpegs compress files further by grouping simnilar pixels together, so instead of spelling out the same pixel several times over it notes down how many pixesl and what the value is. The more compression you add the less sensitive it gets to slight variations in pixels and lumps similar tones together, hence causing loss of image quality when the file is re opened.

 

[cybergools]

No - bits are the samllest piece of computer data, a 0 or a 1. 8 bit files use 8 0s or 1s to define what's in 1 pixel. 16 Bit files use 16 0s and 1s to define the same pixel in greater detail , so you get twice the file size. Jpegs compress files further by grouping simnilar pixels together, so instead of spelling out the same pixel several times over it notes down how many pixesl and what the value is. The more compression you add the less sensitive it gets to slight variations in pixels and lumps similar tones together, hence causing loss of image quality when the file is re opened.

Bit tetchy but I sort of understand the difference in file sizes for Jpeg ( compressed and lossy) raw ( compressed and lossless) and tiff ( uncompressed and lossless )
😄

 

[Suvv]

Bit tetchy but I sort of understand the difference in file sizes for Jpeg ( compressed and lossy) raw ( compressed and lossless) and tiff ( uncompressed and lossless )
��

A TIFF is compressed but is lossless therefore you do not lose any info. when compressing and uncompressing. If you save a JPEG and then edit it later you lose a bit more info when you resave it. If you continue to re-open, edit and re-save the JPEG you will get more and more losses. Whether this will have a real detrimental effect is debatable . If you save as a TIFF you can re-open, edit and re-save as much as you like without any losses.

FWIW Raw files are either not compressed, have lossless compression applied or have virtually lossless compression apllied. Raw files do not contain any colour data and each pixel is saved as a brightness value only, it is when the raw file is opened in a raw converter that the colour info. is calculated and then each pixel has info. for red, green and blue.
JPEGs before compression are large as they have the 3 colour info. calculated when they are created.
TIFFs have the 3 colour info. calculated so they are large and they are not as compressed as much as JPEGs.

That along with the different bit sizes accounts for the different file sizes.

 

[Ian D J]

I've actually found a use for TIFF files. It's perfect for "flood filling" in black line art after I have scanned my cartoon drawing on the PC, whereas JPEGs show up artifacts after that area has been "filled in". It's also where it can be opened on any processing type programmes - whether it's my Paint Shop Pro X3, Lightroom or even Microsoft Paint.
However, then when I want to show the completed coloured in cartoon on the internet, I then save it as a JPEG format (after resizing it, of course) as that's when the file size is greatly reduced - ideal for emailing and showing on facebook, etc - but the original TIFF file is saved on the hard drive for future use. Doesn't half gobble up space, though!