Photos.app: Are the functions 'culture' and 'rotation' jpg lossless?

For jpg files, there are ways without loss to change.

https://en.Wikipedia.org/wiki/JPEG#Lossless_editing

For example rotations and cultures.

My question:
Are the functions for jpg lossless ' rotation' and 'culture'?

Thanks for your help.

All changes in the Photos are lossless, except if you use photo editing extensions.  Photos stores the original images and a description of the adjustments to be applied to the picture, and if you add more settings, all changes will be calculated from the original main image file. YOYYu can always undo changes and revert to the original.

However, if you export the edited pictures version, the final version will be made to TIFF to JPEG, and the amount of the losses depend on the JPEG quality you select or the size in pixels.

Export a cropped or rotated image will result in a smaller file size.

But while the picture is in Photos all settings are stored in the photo library without loss.

If you use Photos of externally modified image photo editing extensions will be returned in a new and more original image file the original image file. You will still be able to return to the originl, but no longer be able to cancel all the menu sepaarately sub-mode.

Tags: Mac OS & System Software

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