How to get images "right side up"

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  • Updated 10 years ago
I have some images that are in portrait orientation and others in landscape.
Photosynth says I should have them all positioned "up". How do I do this?

thanks for any help
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Huck Rorick

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Posted 10 years ago

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Nathanael Lawrence

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In Windows Explorer (some people may call it 'My Computer' or 'Computer'), a simple free photo editing program such as Windows Live Photo Gallery, Picasa, etc., or higher grade photo editors such as Photoshop, Paint Shop Pro, or The Gimp, you can easily rotate any image and save it rotated.

To do this in Windows Explorer, simply highlight all the photos which you want to rotate in a single direction (either right or left) and select 'Rotate clockwise' or 'Rotate counterclockwise'. You can hold down the [Ctrl] key to select or deselect individual photos, hold down the [Shift] key to choose all the files between the first file clicked on and the second, or use [Ctrl]+[A] to select all files in a folder, if they all need to be turned in the same direction.

Dedicated photo editing software will have different interfaces for rotation, but both Windows Live Photo Gallery and Picasa have very obvious rotation arrows.

If you are viewing the photos in Thumbnail view in Windows Explorer and the thumbnails are all right side up, they are ready for Photosynth.

Programs like Windows Live Photo Gallery often have an option to automatically try to rotate portrait shots to be right side up when they are importing the photos from your camera's memory card.
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Huck Rorick

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Thanks again Nathaniel.

It would be very helpful to be able to tell photosynth the orientation of a photo without having to use another program to rotate the original. I use images in different programs and rotating images would sometimes conflict with use in another program.
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Nathanael Lawrence

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Photosynth will attempt to read orientation data from the photo's EXIF metadata, if your camera has provided it, even if it hasn't been manually rotated.

Out of curiosity, what other software requires you to have your portrait shots tipped on their sides?

P.S. For the record, photos which are tipped on their side stand an equally good chance of matching the other photos which are right side up.

I believe that the only real purpose of rotating the source images right side up before synthing them is so that Photosynth can more accurately detect which direction is actually 'up'. You may have seen synths where some of the photos have been uploaded on their side or even taken at a 45 degree angle. Once they have been matched to other right side up photos, though, they are displayed right side up within Photosynth. It doesn't matter if each image tips a little to one side or not, because after they have been matched to each other, they are locked in relationship to each other. As long as the majority of your photos are right side up, they'll pull the few that are on their sides into place.

Here's an example from one of your synths. Note that if you switch to 2D view, you can see that two of the photos in this cluster were uploaded sideways, but because of the orientation metadata (I assume), all three are displayed right side up in 3D view.

One other example: The second photo in this synth was taken at a 45 degree angle, but because it matches to others which were taken and uploaded right side up, the waterfall and the people are displayed right side up when viewing the photo in 3D view.
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Huck Rorick

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The other program I use that pays attention to orientation of photo is PTGui for doing spherical and other panoramas. Which reminds me, can an equirectangular panorama be uploaded to photosynth and then displayed as a spherical panorama?

With PTGui I also have to use another program to rotate images at times. it also uses the EXIF data. That can get confusing when you are taking pictures with the camera pointing straight up.
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Huck Rorick

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Oops! I guess I asked that question (re uploading non ICE panorama) and you answered it.
Thanks,

Huck
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Nathanael Lawrence

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Ah, I understand the difficulty in cases of photos that are looking into the sky or aerial shots that are looking straight down. Although Photosynth can stitch a bunch of aerial photos that are looking straight down at the Earth and it's pretty simple to pan around the collection, the 'up' direction is rarely correct, unless the photos were taken at more of a 45 degree angle towards the horizon.

As far as your panorama question, all of Photosynth's panoramas are cube-mapped, I believe, so it sounds possible, but I'm not an expert on panoramas. The forums for HD View and Image Composite Editor would be good to ask as those guys worked on Photosynth's panorama viewer with the Photosynth team. I'd say to just fire up the recent Photoshop plugin and see what you get.