LoadImageInfo does not return correct values for width and height if image is from mobile phone and image is in portrait mode

[peter-tornqvist-kan]

As per the title, if I want to get width/height of an image in portrait mode from a mobile phone, the width and height are incorrect (width is wider that height).

I use this code to call the method:

using (var stream = imageBlob.OpenRead())
			{
				string[] info = new[] { "source.width", "source.height", "final.width", "final.height", "result.ext", "result.mime" };

				var length = stream.Length; // set length before calling LoadImageInfo
				var result = CurrentImageBuilder.LoadImageInfo(stream, info);
				return new Tuple<int, int, long>((int)result["source.width"], (int)result["source.height"], length);
			}

Is there some setting I am missing in the call to LoadImageInfo (i.e in info)?

I've found code here on github that seems to indicate that you do actually autorotate by default for some calls (in ImageBuilder.PostDecodeStream), but I am unsure if this code is > 4.2.8 or not called when calling LoadImageInfo.

We are currently on ImageBuilder 4.2.8

Thanks

[lilith]

Have you checked final.width, final.height? the source values would be pre-rotation.

[peter-tornqvist-kan]

I haven't. I always presumed that those were for when you did any crop/resize actions and they would hold the resulting size of the cropped/resized image. Is this documented somewhere, I was unable to find it?

[lilith]

Phones don't rotate the photo, just set metadata about which way was up. Rotating/flipping the image to match metadata is like cropping.

…

On Thu, Feb 13, 2025, 1:15 AM peter-tornqvist-kan ***@***.***> wrote: I haven't. I always presumed that those were for when you did any crop/resize actions and they would hold the resulting size of the cropped/resized image. Is this documented somewhere, I was unable to find it? — Reply to this email directly, view it on GitHub <#470 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAA2LHYN3S3UDIZJFY7BBIL2PRICVAVCNFSM6AAAAABWCV2AJ2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMNJVHAZDKNJTGU> . You are receiving this because you commented.Message ID: ***@***.***>

[peter-tornqvist-kan]

Yes, I know how phone images store data, that's why I never considered that final.* would hold the rotated/cropped dimensions even if I hadn't done any cropping/rotating. To me, that just doesn't make sense, but now I know