jpeg to tiff - DPChallenge Forums

Sigma 20mm f/1.8 EX Aspherical DG DF RF for Canon

05/13/2005 08:41:52 PM · #1

so, jpeg compresses the pix, and can cause artifacts.

should I make it SOP to make final edits into TIFF?

yido

Canon EOS-5D

05/13/2005 08:48:20 PM · #2

you can but a 3MB JPEG image is equivalent to about 15MB or more in a TIFF format if I remember correctly.

faidoi

Pentax K10D

Pentax DA 18-55mm f/3.5-5.6 AF

05/13/2005 08:53:11 PM · #3

Originally posted by swinging_johnson_v1:

so, jpeg compresses the pix, and can cause artifacts.

should I make it SOP to make final edits into TIFF?

TIFF is loseless so that means you can tweak it all you want and it doesn't get degraded. TIFF is compressed also unlike RAW, it's just doesn't degrade everytime you save like JPEG.

Of course remember to keep you original jpeg image saved for challenges.

Artifacts

Canon EOS-5D Mark II

Canon EF 24-105mm f/4.0L IS

05/13/2005 09:02:02 PM · #4

Originally posted by swinging_johnson_v1:

so, jpeg compresses the pix, and can cause artifacts.

should I make it SOP to make final edits into TIFF?

There are a lot of things you might do depending on your ultimate goal. You will no doubt get tons of advice.

What I do is convert all my processed images to .tiff and create my edited source file in .tiff.

The reason I convert to .tiff is because it is a lossless format that I can edit and reedit as often as necessary without losing image data. Within that .tiff file I always keep an original in an untouched layer for comparison and recovery if needed.

From the .tiff source file I will create flattened output files for print or web as needed. USM is applied at the time an output file is produced.

.Tiff files can be huge. It is not uncommon for them to be upwards of 100 Meg depending on the number of layers you have.

RobCoursey

Nikon D100

05/13/2005 09:46:30 PM · #5

Originally posted by swinging_johnson_v1:

should I make it SOP to make final edits into TIFF?

First thing I would note is that it'd be best, if at all possible, to start with tiff. Meaning, let the camera shoot in tiff format vs. jpg. That way the compression and hence potential loss would be avoided from the absolute onset. In short, start with the pure image and work down from there.

Artifacts

Canon EOS-5D Mark II

Canon EF 24-105mm f/4.0L IS

05/13/2005 09:57:59 PM · #6

Originally posted by RobCoursey:

Originally posted by swinging_johnson_v1:
should I make it SOP to make final edits into TIFF?

First thing I would note is that it'd be best, if at all possible, to start with tiff. Meaning, let the camera shoot in tiff format vs. jpg. That way the compression and hence potential loss would be avoided from the absolute onset. In short, start with the pure image and work down from there.

That is what I thought and my camera can take images in .tiff, but I still shoot in .jpg anyway.

I did a cross comparison between .tiff and .jpg as taken by my F-717. Though .tiff is a fractional bit better the entire advantage is negated with even the slightest post-processing. .tiff files are about 6 times larger than .jpg and it takes a month of sundays for it to the .tiff to disk.

It is impractical to take pictures using .tiff with the F-717 and there is no advantage so I shoot in .jpg.

Canon EF 28-105mm f/3.5-4.5 II USM

05/13/2005 10:06:03 PM · #7

If you shoot Jpeg, just save your original file as a tiff before you make any adjustments to it. Make all your edits and size changes (and USM) to the tiff file and then save it as Jpeg for DPC. you will be miles ahead of the game by adding those two steps.

autool

Canon EOS-20D

05/13/2005 10:15:48 PM · #8

Lets say I just converted a RAW file and made a few adjustments and liked it. If I save it as a tiff will it make a larger print than if I save it as a jpeg? Theoretically this is all without any further processing.

05/14/2005 01:09:10 AM · #9

Originally posted by autool:

I would say no, Not without additional processing. The advantage that the Tiff has over the Jpeg is the artifact distortion of the Jpeg is no longer present. If you use step intervals to re-size your file to a larger dimension, The Tiff will upsize cleaner than the Jpeg will. But if you are not going to do any further processing to the image, how will you get it to the larger size? Any edit, any size change or additional saves to a jpeg will result in a degradation of quality.

If you have the ability to shoot Tiff, but you choose to shoot a compressed image, you must be lacking either time or space. For me, there are not many other advantages.

05/14/2005 01:26:19 AM · #10

Originally posted by RobCoursey:

my canon does not shoot tiff files, or am I missing something?

05/14/2005 01:30:19 AM · #11

when I rename my photos, and i put a tiff file extension, a window says that changing the file extension may make my pix unusable.

is this a standard warning,and should i ignore it?

should i just save to jpg, and then later 'save as' a tiff?

if i don't respond soon, i either went to bed, or my head exploded.

05/14/2005 01:52:11 AM · #12

Originally posted by swinging_johnson_v1:

my canon does not shoot tiff files, or am I missing something?

I'm sure you can select the amount of compression that is applied to your Jpeg files. I would always recommend the highest quality and lowest compression settings.

Sony 24-70mm F4 Vario-Tessar T* FE OSS

05/14/2005 01:55:11 AM · #13

Originally posted by swinging_johnson_v1:

Depending on which software program you are using, you should have a drop-down list to save as... Tiff, Jpeg, Gif, Bmp, so on.
Just changing the extention will make the file unreadable for most software programs.

Bear_Music

Samsung Galaxy S24 Ultra

05/14/2005 03:00:48 AM · #14

Originally posted by swinging_johnson_v1:

It's not a matter of what you call iut, it's a matter of what it IS. Just changing the extension is worse than useless, because the software usually won't even open it; it's looking for a file saved by tiff rules and a jpg doesn't use those rules. When you "save as" you are actually converting the "language" of the image file itself, from a jpg into a tif.

On you Canon you have a very high-quality jpg option, and you wouldn't be able to tell the difference between that and a tiff after you converted it into one. My Nikon 5700 has a high-quality jpg and tiff and RAW available, and for my purposes the jpg is fine. In fact, for DPC shooting I don't even use the highest-quality jpg I have available, although I probably should. But I get ok results at the "fine" setting, I don't need the ultimate setting for these little images.

If I'm shooting shots I think I may want to market, I usually shoot the tiff. The RAW on this camera is a pain in the ass. The tiff's actually larger, btw...

Robt.

Canon EF 17-40mm f/4.0L USM

05/14/2005 08:56:17 AM · #15

ok,
I obviously need help writing. I am not conveying my responce good enough.

I normally shoot large JPEG, or RAW. In my canons menu, there is no TIFF option.

When I do a batch rename, if i put a differant file extension in with the rename, i get a window that says that the file will be unuseable.

everything is fine after i save as jpeg, then go back into that pix/file, and resave it again when i go into save as.

is there a better way, or am i doing what i should be doing?

dahkota

Canon EOS-7D

05/14/2005 09:03:02 AM · #16

Originally posted by swinging_johnson_v1:

You're doing what you should be doing. Save and save as are two different functions. Save saves it as it is, save as converts it.

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