When I Upload Images They Get Fliped

Louis Skrabec wants the angle on photo orientation:

I downloaded photos from my camera to my Windows PC. I rotated photos taken in portrait orientation 90 degrees using the photo editing feature and saved the changes. Then created a new shared anthology in iCloud and uploaded the photos. All portrait photos that I rotated to proper positions are back in landscape orientation. What did I do wrong? How do I set them?

Rotation is a surprisingly complicated upshot! What you lot're seeing is a common mismatch between editing and display software.

Modernistic digital cameras and smartphones rail the orientation of your device and rotate the preview yous see to be the right abroad up, no matter what you do. Some devices might only permit 90-degree clockwise and counter-clockwise rotation from what's considered upright, just whatever usable smartphone can handle 180 degrees.

But an image sensor always captures the data without regard to orientation: information technology'southward just grabbing photons and recording the measurements relative to the physical array in which information technology's located. Some cameras can store this as a raw file, unique to each camera make, that's the mostly prefiltered data captured by a sensor. Others can only output in JPEG or another format, or yous can opt to become JPEG and raw or JPEG instead of raw. (Raw is frequently capitalized as RAW, merely it'south not an initialism.)

If the camera were to produce with data stored in the aforementioned orientation as you took the picture, except for the unmarried orientation that matches how data comes out of the sensor assortment, it would demand to create a 2d image file into which to map each pixel from one orientation to the other, and then delete that original file.

Earlier cameras lacked the computational ability to handle this rotation, which was also RAM intensive: The image would demand to exist rotated before the sensor data was converted to a file format that compressed image data, similar JPEG. "Lossy" file formats like JPEG employ approximations via mathematical formats to describe regions of an paradigm; some photographic camera makers' raw formats are lossy as well. ("Lossless" compression is less efficient, only by identifying redundant patterns in a hunk of data, it allows an verbal reproduction of the original data from the compressed file.)

It's possible to rotate JPEGs without adding boosted image quality loss if the image resolution divides perfectly into the 8 by viii or 16 by 16 grids that a given JPEG algorithm used. Not all cameras had the perfect units years ago, and not all withal do.

But if a photographic camera (or other software) rotates a JPEG after information technology's been saved in that format, each decompression, rotation, and recompression progressively ruins the epitome.

The trick that camera makers came upwardly with was to avert rotating pixels and, instead, set a flag in the EXIF metadata that'due south incorporated in any image their camera exports. The orientation flag has one of 8 values, representing each rotation of 0 degrees, ninety degrees, 180 degrees, and 270 degrees, too as mirror flips (flipped top to bottom and left to right, and clockwise rotated meridian to bottom and left to right). (Rotations that aren't aren't at right angles always involves modifying epitome information to guess the new bending.)

8 different orientations tin exist represented with a value for the EXIF Orientation tag.

Ii images, ane in the same rotation as the image-sensor assortment in the iPhone and the other rotated, have their Orientation value tagged in EXIF data.

Any software that can display an image should be able to read this orientation flag and display a photo in the right orientation. Likewise, whatever image-editing software, on opening a file and decompressing it (if necessary) to brand information technology editable should besides orient information technology showtime.

However, image software in Windows prior to Windows 8 couldn't read the orientation flag, and many Mac OS X apps used to suffer from the same problem, including iPhoto four and earlier versions.

As one example, GraphicConverter for Bone 10 has a lot of EXIF rotation options to assist with import and editing.

I'1000 surprised whatsoever software Louis is using in 2016 would have this problem, merely it would seem to be a mismatch betwixt whatever it encoded in EXIF and what iCloud read from the upload—iCloud doesn't strip EXIF data.

Unfortunately, iCloud.com doesn't permit you edit photos once they're uploaded. In order to go the correct online rotation, you'll need to either apply an iOS device or an OS X devices with iCloud Photo Library synced to that collection, or use different software to handle the rotation and re-upload.

If y'all're handy with the command line, in OS X or Windows, yous can also use the gratis ExifTool to modify embedded EXIF data in photographs.

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Source: https://www.macworld.com/article/227941/how-to-solve-incorrect-photo-rotation-after-sync-or-upload.html