The way to use convert –strip command line from system operational perspective.

[fmw42]

In the file you uploaded the Orientation says TopLeft, which ImageMagick gets from the exif:Orientation: 1. That means there is no rotation needed. Once you strip it, the orientation will say Orientation: Undefined, since there is not exif:Orentation field for ImageMagick to get the value. If there is no orientation value, then none will be applied.

If this is not expected, then there is something odd with the camera recording the orientation or some other processing has changed the orientation values.

[PleskQuestion]

Fmw42,

Thank you for your time.

So, it is all about the issue of smartphone's os.

"I do not understand at all why the image initially taken vertically that has the orientation of TopLeft and 1 is displayed rotated towards 90 degrees right in the website."

When the image was uploaded to pc (os of Windows 10) from iPhone it was already displayed rotated, and then I uploaded to the web server from pc via FTTTP. So the image was not affected by my application, hosting service, or strip command.

Do you, or does anyone know why this phenomenon happen??

[fmw42]

1 means it was take TopLeft orientation. So that agrees with IM. See http://www.impulseadventure.com/photo/e ... ation.html.

Did you process this image in any other tool that might have changed the orientation flag? How did you get the image out of the camera -- what tool did that?


Are you absolutely positive the camera was in a different orientation? Does the smartphone have a settings that might be in a mode indicating that setting of orientation is off?

You uploaded your image to Motown. Might they have modified or reformatted your image such that the orientation is changed?


Perhaps you should make some tests of your camera and take pictures in different orientations and see what IM identify -verbose says about them.

[snibgo]

In the file http://metown.info/upload/save_image/595.JPG
, the EXIF data says the photo is horizontal, and doesn't need rotating. So software will not automatically rotate it.

If the metadata ever said the photo was vertical, that metadata has gone.

[fmw42]

This photo says it was taken with orientation=1 or TopLeft. So it will not be rotated by IM -auto-orient.

Again, to be sure, I suggest you retest your smartphone camera and run

Code: Select all

identify -verbose yourimage.jpg

and see if that agrees with the orientation you think it should have.

Check your smartphone settings to be sure auto-orientation is not disabled. Perhaps it is broken.

[fmw42]

P.S. If you think this image has a wrong value and want to correct it, you can use EXIFTOOL to edit the orientation flag to the proper value.

[PleskQuestion]

snibgo,

Thank you for your time.

> the EXIF data says the photo is horizontal,

Where in the exif data does it say that the photo is horizontal?

[snibgo]

From here:

exif:Orientation: 1