Save for web takes away EXIF information ?

Sigma 18-200mm f/3.5-6.3 DC OS for Nikon

01/21/2007 02:09:58 AM · #1

I never noticed that before. I am now straight saving to .jpg and using the closest 10% increment of quality to get below 150 kb and retain the EXIF information with the photo.

Need I bother?

01/21/2007 02:11:26 AM · #2

You don't need to save the EXIF of your resized version for DPC. It just takes up space that you can use for extra quality. Ditching it is fine. You just need to retain your original which has the EXIF needed for proof.

01/21/2007 02:34:22 AM · #3

Anyway, the EXIF gets stripped when you upload.

RainMotorsports

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

01/21/2007 02:41:02 AM · #4

Alot of sites that used the GD library to process images through php scripts strip EXIF data.... more like just doesnt know what todo with it.

Greetmir

Sigma 18-200mm f/3.5-6.3 DC OS for Nikon

01/21/2007 03:06:56 AM · #5

Originally posted by cpanaioti:

Anyway, the EXIF gets stripped when you upload.

Well ... for example ... if I right click on this image ...

... after enlarging the thumb, of course ...

... and "save image as" ... when I open it on my computer all the original EXIF information is still there.

But lately ... it is getting stripped from the image even BEFORE I upload when I use "save for web" in PhotoShop ... I must have accidentally changed SOMETHING.

Message edited by author 2007-01-21 03:08:07.

RainMotorsports

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

01/21/2007 03:08:02 AM · #6

Thats very odd that the exif data is still there normally its stripped

Greetmir

Sigma 18-200mm f/3.5-6.3 DC OS for Nikon

01/21/2007 03:11:46 AM · #7

Originally posted by rainmotorsports:

Thats very odd that the exif data is still there normally its stripped

... same with this one and MANY of the images in my portfolio ...

...

chimericvisions

Canon EOS-60D

Canon EF 24-70mm f/2.8L II

01/21/2007 03:13:24 AM · #8

Originally posted by rainmotorsports:

Thats very odd that the exif data is still there normally its stripped

It really doesn't. Many challenge images still have EXIF info in them. At times it's been used to recommend DQ for dates.

If you're a Firefox user, check out FxIF... you can view the EXIF info simply by right-clicking and selecting properties on the image.

Message edited by author 2007-01-21 03:14:21.

01/21/2007 11:09:46 AM · #9

Originally posted by Greetmir:

... and "save image as" ... when I open it on my computer all the original EXIF information is still there.

But lately ... it is getting stripped from the image even BEFORE I upload when I use "save for web" in PhotoShop ... I must have accidentally changed SOMETHING.

I don't think you accidentally changed anything. "Save image as" does not strip EXIF. "Save for web" does.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

01/21/2007 11:25:45 AM · #10

I just looked at a couple of my images. Ones that have been loaded into challenges have the EXIF stripped but the ones loaded to my portfolio don't. (the ones I didn't use save for web on)

edit: Along this same line, if some EXIF is being kept why is the aperture/shutter speed/iso area not automatically filled in when we upload?

Message edited by author 2007-01-21 11:33:25.

GeneralE

Canon PowerShot S3 IS

01/21/2007 12:14:54 PM · #11

Originally posted by mk:

Originally posted by Greetmir:
... and "save image as" ... when I open it on my computer all the original EXIF information is still there.

But lately ... it is getting stripped from the image even BEFORE I upload when I use "save for web" in PhotoShop ... I must have accidentally changed SOMETHING.

I don't think you accidentally changed anything. "Save image as" does not strip EXIF. "Save for web" does.

In Photoshop, if you use Save As Copy you should have a checkbox option to "Exclude Non-Image Data" which will strip the EXIF; a regular Save As command will not.

For DPC entries, you usually would want to strip the EXIF data to reduce the file size and make sure it's under the limit. We only require intact EXIF info in the original file if it is submitted for validation.

chimericvisions

Canon EOS-60D

Canon EF 24-70mm f/2.8L II

01/21/2007 04:01:43 PM · #12

Originally posted by cpanaioti:

I just looked at a couple of my images. Ones that have been loaded into challenges have the EXIF stripped but the ones loaded to my portfolio don't. (the ones I didn't use save for web on)

It's just the differences in the way you save them. The only challenge entries of my own that don't have EXIF are the ones that I used Save for Web (which I usually use) on instead of Save As.

Has EXIF:

No EXIF:

Originally posted by cpanaioti:

edit: Along this same line, if some EXIF is being kept why is the aperture/shutter speed/iso area not automatically filled in when we upload?

My guess is that the EXIF functionality in PHP is... buggy and unreliable. There are external libraries that accomplish EXIF processing pretty well, but I think that the propensity of users to use Save for Web makes the work of adding that code seem a little superfluous.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

01/21/2007 05:20:26 PM · #13

Originally posted by cpanaioti:

I just looked at a couple of my images. Ones that have been loaded into challenges have the EXIF stripped but the ones loaded to my portfolio don't. (the ones I didn't use save for web on)

Same method was used for both. I downsized using Adobe Lightroom, not save for web.

GeneralE

Canon PowerShot S3 IS

01/21/2007 05:32:15 PM · #14

Originally posted by cpanaioti:

I think the challenge upload script strips the EXIF from all entries, but the portfolio upload does not -- I think it has to do with the size limitation in place for challenges; portfolio images are not limited to 150kb like entries.

Canon EF 24-70mm f/2.8L II

01/21/2007 06:35:50 PM · #15

Originally posted by GeneralE:

Originally posted by cpanaioti:
I just looked at a couple of my images. Ones that have been loaded into challenges have the EXIF stripped but the ones loaded to my portfolio don't. (the ones I didn't use save for web on)

edit: Along this same line, if some EXIF is being kept why is the aperture/shutter speed/iso area not automatically filled in when we upload?

I think the challenge upload script strips the EXIF from all entries, but the portfolio upload does not -- I think it has to do with the size limitation in place for challenges; portfolio images are not limited to 150kb like entries.

Then something is weird. I looked at a challenge entry (currently in voting) and it had some EXIF info whereas most others had none.

chimericvisions

Canon EOS-60D

01/21/2007 06:45:36 PM · #16

Originally posted by GeneralE:

Yeah, I'd say that's definitely not true, or if it is there are some bugs in it. I've got at least one entry that still has EXIF, and I regularly see entries (not my own) that still have it.

Nikon AF Nikkor 20mm f/2.8D

01/21/2007 06:49:33 PM · #17

Originally posted by chimericvisions:

Originally posted by GeneralE:
I think the challenge upload script strips the EXIF from all entries, but the portfolio upload does not -- I think it has to do with the size limitation in place for challenges; portfolio images are not limited to 150kb like entries.

Yeah, I'd say that's definitely not true, or if it is there are some bugs in it. I've got at least one entry that still has EXIF, and I regularly see entries (not my own) that still have it.

I'd guess bugs because I never use save for web and lots (I'm not going to check all) of my entries don't have EXIF.

LanceW

Nikon Z9

01/21/2007 06:54:41 PM · #18

Originally posted by mk:

I'd guess bugs because I never use save for web and lots (I'm not going to check all) of my entries don't have EXIF.

I just checked your last two challenge entries and they both did have EXIF info included.