Tif to jpg - DPChallenge Forums

Nikon AF-S DX Zoom-Nikkor 18-55mm f/3.5-5.6G VR

05/30/2007 08:04:06 AM · #1

Is any information lost when converting tif to jpeg? I just sold my first image and the file is a 28MB tif file. I can't send it through gmail OR my ISP account. I converted it to jpeg and I'm sure that's good enough. Just wondering if anything in fact does happen?

RainMotorsports

Nikon D60

05/30/2007 08:05:36 AM · #2

Is the Tiff 8 or 16 bit? And where dit the tiff originate from?

Either way even if its 8 bit it will lose quality from jpeg compression any image including a jpg loses quality when being saved or resaved in the jpeg format.

Save it at 100% quality the difference will be minimal but their aint much going back. What does happen is every 8x8 square of pixels is saved by luminance instead of color sacrificing actual color data for file size. In high contrast edges you get artifacts and in extreme cases of editing such as sharpening you can see the 8x8 blocks.

Message edited by author 2007-05-30 08:06:44.

kirbic

Canon EOS R5

Canon RF 24-70mm f/2.8 L IS

05/30/2007 08:07:54 AM · #3

It really depends on the quality setting of the JPEG. If you set the quality to a very high level, there will be *very* little visible change. If you set it to a low level, there will be easily visible change. Any JPEG file is going to be much smaller than an uncompressed TIFF.
JPEG does use "lossy" compression, so it does degrade the data somewhat. Repeatedly editing and saving a JPEG is not a good idea, because you lose more data each time you re-compress (re-save).

05/30/2007 08:08:27 AM · #4

8 bit tiff converted from RAW is what I was working with.

Nikon AF-S DX Zoom-Nikkor 18-55mm f/3.5-5.6G VR

05/30/2007 08:12:07 AM · #5

I work entirely with the tiff files, and only when needed I convert to jpeg, when size becomes an issue. I don't go back and forth.

RainMotorsports

Nikon D60

05/30/2007 08:14:38 AM · #6

You can try a PNG, like Tiff's they offer lossless compression and 16 bit color support when the source is 16 bit.

Chances are itll be about the same size though. All major browsers support PNG, minus alpha transparency support in IE 6 and back.

Message edited by author 2007-05-30 08:15:11.

tate

Apple iPhone 15 Pro

Nikon AF Nikkor 50mm f/1.4D

05/30/2007 08:16:28 AM · #7

Certain images with more color and detail don't respond as well to compression â�¦ here's another option:

A review of some web sites for sending large files

Yousendit.com (it's free for anything under 100MB and you don't need to register)

Photologist

Apple iPhone 16 Pro Max

Canon EF 70-200mm f/2.8L IS USM

05/30/2007 11:09:31 AM · #8

I'm curious...I normally sell the print, not the original file. Why did the buyer want the original file? Is it to be published somewhere?

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