topic Re: Orientation of Embedded JPEG in CR2 Raw Image in EOS DSLR & Mirrorless Cameras

EOS Rebel T7 Orientation of Embedded JPEG in CR2 Raw Image

GHPorter — Tue, 18 Jul 2023 12:35:28 GMT

I have an EOS Rebel T7, and I have noticed that by default the orientation of the JPEG embedded in my CR2 raw images is not consistent with the raw image itself. So far I’ve only noticed this when my camera is set to auto-rotate new images, but I haven’t looked at images that are not auto-rotated.

Is there a menu selection on the T7 that lets the photographer control the embedded JPEG’s orientation? If not, is there some other way to make the JPEG match the raw image?

Re: Orientation of Embedded JPEG in CR2 Raw Image

Anonymous — Fri, 14 Jul 2023 22:03:50 GMT

I don't know of any setting like that, at least on the Canon cameras that I own. Sounds like you need to turn auto rotation off.

Re: Orientation of Embedded JPEG in CR2 Raw Image

Peter — Fri, 14 Jul 2023 22:14:21 GMT

Do you have an affected raw file to share? What raw converter are you using?

Re: Orientation of Embedded JPEG in CR2 Raw Image

GHPorter — Fri, 14 Jul 2023 22:28:06 GMT

I don’t have a picture handy; I’m using a tablet at the moment, but I’ll find one and post it soon. I use DPP as well as RawTherapee to process my raw images.

The issue is that my computers (primarily Macs) can pull the JPEG for a thumbnail in a directory display, but since the JPEG may not be oriented the same as the raw image - and I may have multiple, similar images that were taken in various orientations - the thumbnail display makes it hard to determine which exposure I’m looking at. This is much more challenging when the image is a scan of a negative.

Re: Orientation of Embedded JPEG in CR2 Raw Image

FloridaDrafter — Sat, 15 Jul 2023 00:13:00 GMT

@GHPorter wrote:

"Is there a menu selection on the T7 that lets the photographer control the embedded JPEG’s orientation? If not, is there some other way to make the JPEG match the raw image?"

No. That info (orientation) is passed to whatever viewer/editor you are using via EXIF metadata that is stored in your file or a sidecar file that accompanies the original file. If your viewer/editor can not read that data properly, it will not know the proper orientation.

My best guess is that whatever you are using as a viewer isn't able to read the EXIF metadata properly or your editor isn't writing EXIF to your file. As 5DIV mentioned, Auto Rotate may be messing with your viewer/editor 🙂

Newton

Re: Orientation of Embedded JPEG in CR2 Raw Image

GHPorter — Sat, 15 Jul 2023 14:22:19 GMT

I think I need to clarify that the MAIN image is correctly oriented. It’s only the embedded JPEG that is not correct.

I’m doing a lot of negative and slide scanning, and both my film carrier and slide holder present all images as “landscape,” even if they were photographed in portrait orientation. Generally, autorotate does a good job with these, but it seems that the JPEG version in the raw file isn’t touched by autorotate, or by manually rotating the main image. It is this specifically that I’m asking about.

Re: Orientation of Embedded JPEG in CR2 Raw Image

shadowsports — Sat, 15 Jul 2023 14:37:52 GMT

GHPorter,

One other question. Please tell us more about your image settings. Are you capturing RAW+JPG, RAW only.. and are you shooting in 3:2 aspect? I agree with others, the rendering issue is likely in the viewer. Are any special aspect ratios being specified?

Re: Orientation of Embedded JPEG in CR2 Raw Image

GHPorter — Sat, 15 Jul 2023 14:47:07 GMT

I’m using raw only in the default aspect ratio, which I think is 3:2. I think the “viewer is the problem” is probably the most probable issue, but it seems that any viewer that isn’t natively pulling the main image has this problem.

I wonder if there are apps that let one change the orientation of a JPEG embedded in a CR2 raw file. Google hasn’t helped with this; all I get is suggestions for apps that simply read the raw image. I’m not sure, but I think this may be an example of why serious researchers need search consultants to determine the best search term. Or that Google just ignores terms that don’t help it display ad content/search results…

Re: Orientation of Embedded JPEG in CR2 Raw Image

Anonymous — Sat, 15 Jul 2023 14:51:59 GMT

What if you shoot in RAW and JPG, is the JPG file the correct orientation? If so, would that solve your issue?

Re: Orientation of Embedded JPEG in CR2 Raw Image

GHPorter — Sat, 15 Jul 2023 14:57:09 GMT

I haven’t looked at that. I’ve been using RAW only because (with my previous EOS Rebel XTi anyway) I had storage space issues. I will look at that later today.

Re: Orientation of Embedded JPEG in CR2 Raw Image

GHPorter — Sun, 16 Jul 2023 23:03:41 GMT

I've checked, and I have auto-rotate turned off. Looking back at shots I have done with RAW+JPEG, they all seem to be rotated the same way, but none of those were slide or negative captures.

Now that I think about it, I probably manually rotated the main image in the files I've been complaining about, so the embedded JPEG was likely aligned the same way as the main image until I rotated it.

So now I just wonder if there is some sort of tool that will allow me to edit the rotation of embedded JPEGs if I've manually rotated the main image...

Re: EOS Rebel T7 Orientation of Embedded JPEG in CR2 Raw Image

GHPorter — Sat, 22 Jul 2023 13:24:45 GMT

Having looked through a lot of my RAW images, it appears that the embedded JPEG image is always oriented the same way as the main image. However rotating the main image using either DPP4 or RawTherapee, the JPEG is not rotated. I don’t know if the file format allows editing the orientation of the JPEG, though it looks like rotating the main image is pretty simple.

I would like Canon’s software people to pay attention to this. Adobe’s DNG tools, such as Lightroom, do allow changing details of the embedded preview JPEG image. Adding that ability to their own software, and manipulating their own file format data, would at least keep many people from immediately jumping to Adobe products and ignoring Canon’s.

I’m going to call “my issue” solved, since it’s almost certainly simply a matter of me not recalling which images I had already rotated. Frankly, DPP did make figuring this out much easier, since the thumbnail browser marks edited images as having been edited. However I do very little actual editing with DPP because of its limitations compared to RawTherapee.