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Just a quick update... I checked the size of the two Apple Compressed File (HEIF) pictures that I took for a different thread on OGR Forum that got me into this discussion, and their size was 1.2MB. Assuming that if I had used JPEG settings, I would have gotten a similar size to the above picture of 3.4MB, it sounds like Apple is using to 3 to 1 compression ratio which is not "that" bad. So my previous guess of 10 to 1 compression was not correct. Looking at the two Apple compressed files on a 24 inch monitor, I can see great details including counting rivets on a building.

As I posted earlier in the this thread, I converted the 2 pictures from HEIF type to PNG to post them on the other thread, and the size of the PNG files are 2.1MB, so again I don't think there was a whole lot of "loss" details.

EDITED: Changed original 1.2GB to 1.2MB and original 3.4GB to 3.4MB. Hope Rich is now happy!!!

Last edited by DG
DG posted:

...the two Apple Compressed File (HEIF) pictures...size was 1.2GB. Assuming that if I had used JPEG settings, I would have gotten a similar size to the above picture of 3.4GB..

Two still images total 1.2 GIGABYTES? That's just crazy!

I work in Photoshop literally ever day. I have prepared tens of thousands of images for publication in this magazine, other magazines and for a book I'm about to publish. A FULL PAGE image at 300 dpi, in CMYK color format is a tif image of 30 to 40 Megabytes. To say it another way, that's .03 to .04 Gigabytes for a full page, 8.5" x11" image. A high quality jpg image (a compressed format) is in the 8 to 10 megabyte range, which is .008 to .01 Gigabytes.

How in the world do you get 1.2 GIGABYTES in only two still images? Even worse, how to you get to 3.4 Gigs for two jpg images!

Something is drastically wrong here.

OK, finally figured out how to export the pix in their saved format (JPG or HEIC). Settings>Photos>Transfer to Mac or PC - check keep originals. This scene isn't a great example - not a lot of fine detail - but here's a comparison of one pic shot in HEIC, and one in JPG. Opened both in PS, cropped to a little under 1,000 pixels on a side, and saved as the highest jpeg quality.

First is HEIC:


Second is the jpeg:


The jpeg out of the phone was 4.6 MB, and the HEIC was 3 MB.

And, just to confirm what DG wrote, uploading the HEIC file to the forum didn't work. It shows a page with the corner turned down where the image thumbnail should be under files, when in edit reply.



Images (2)
  • shotheic
  • shotjpeg
Last edited by NKP Muncie

My bad typing on iPad, meant 1.2MB and 3.4MB, well I got the 2.1MB correct so cool off..

If it would make you happy, edit my post to correct it or I will when I get home on a reasonable size keyboard 😁

EDITED: Wow that is the quickest run home in history so I could update my above post, hope you are happy Rich. And yes John, since the iPhone has a 12 megapixel camera, getting a 3.4GB or 1.2GB picture out of it would be amazing!!!

Last edited by DG

I agree with Jim, I have uploaded Apple compressed pictures to Windows 10 computers with no problem, posted them on camera forums with no problems (not surprising), and text/emailed them to Android based devices with no problems for the receiving party, so that is why I was surprised when OGR forum software didn’t seem to like the files.

In fact the way I converted the Apple compressed pictures to PNG files to post here was to upload them to a Windows 10 computer and then convert and post them

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