3.3: Diffraction Gratings - diffraction gratings
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On Linux, get EXIF info with Gimp or Image Magick (which is usually pre-installed). Get the orientation of an image on your computer with this command in the console (via ImageMagick):
Exiftool is a Perl library/command-line application allowing you to read and edit meta information in images. A standalone Windows executable is provided if you prefer not to use Perl:
Below are some programs that you can use for viewing and editing EXIF meta data. They'll also let you edit other types of image meta data - IPTC and XMP data - which can help protect your images with copyright information.
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To correct the orientation of images already uploaded to Sirv, use Sirv's image editor to rotate them. Right-click the image and choose "Edit image" to open the image editor.
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Zoner Photo Editor is a photo organizer and editor with an image information feature for viewing EXIF orientation. Professional and free versions are available:
It's easy to check the EXIF of images in your Sirv account. All the meta data within your image - EXIF, XMP and IPTC meta - can be seen by appending ?info to the image URL. You'll see a JSON formatted text file, showing all the data.
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There are 8 possible values (not just landscape and portrait!). The EXIF orientation value is used by Photoshop and other photo editing software to automatically rotate photos, saving you a manual task.
Popular photo editing programs can automatically fix the EXIF orientation when an image loads. They also update the meta if you rotate or flip an image manually. Programs including Photoshop, ACDSee, Picasa, GIMP and OSX Preview. However, some programs have been known not to do this, including Windows Photo Viewer, Microsoft Paint and Microsoft Office Picture Manager.
Mac OS lets you quickly check the EXIF orientation in Preview. Open an image and press CMD+I to view the images properties.
When images are photographed, digital cameras use orientation sensors to store an EXIF orientation value for how the camera is held.