Image Pre-Edition With Gimp
On this page we will learn how to delete the nodal rotator from the original source images to maximize the area completely visible in a Spherical Panorama, using this excellent free image editor.
In the next pages we'll create a Spherical Panorama With Nadir Cap using the shots that we'll edit here.
For our example we count on a Spherical Panorama photographed in nine shots, one of them pointing at the zenith, six shots pointing at the sides and two shots pointing at the nadir, the later ones rotating the nodal rotator to one side and to the other successively :
We are going to work over the last two images, the only ones where the rotator we intend to delete is visible. To get started, we'll open the first image with Gimp, either dragging the file into the program's main window or opening it from the File menu :
The opened image is visible :
Displaying the options of the Image menu we'll click on Scale Image :
A new Gimp's window opens correponding to the active tool, where inter alia we can read the dimensions of the open image. We'll pay attention to them so we can remember this figures in the next step. To go on it will be necessary to close this window :
At the File menu we'll click on New to create a new document :
A new window will open where to decide options for the document to be created. As dimensions for it, we'll type in the same dimensions of the open document on which we have been working, the one from which we want to crop out the nodal rotator and whose dimsnions we have just read on a similar window. We'll click on Advanced Options and make sure that the document background is filled with a Transparency :
After clicking on OK a new window will open with the required charateristics : the same dimensions as the open document plus a transparent background :
Back to the initially opened document, we'll display the Select menu and click on All. Alternatively we could do the same by pressing the Control + A key combination which will also get the entire image selected :
Next we'll display the Edit menu and click on Copy, or we can replace this step by theControl + C key combination :
This way, with the image copied to the clipboard, we'll get back to the recently created document, where displaying the Edit menu we'll click on Paste or simply hit the Control + V key combination :
Now we have that the new document has two layers, the one in the back is transparent and the one on top is the image of the nadir of our panorama :
At this point it will be convenient to maximize this window to go on working on it, while we can close the file open at the beginning since we'll no longer need it :
To avoid accidentally moving the imagen within the document, now it will be neccesary to anchor the image by displaying the Layer menu and clicking on Anchor Layer :
Now we are ready to start deleting from the image those parts we are not interested in. Out of the many tools we could use for this task, for this example we'll choose to activate the Ellipse Selection tool from the toolbox :
With this we'll select a circle to crop in the center of the image where the center of the nodal rotator is located :
With the Delete key of our keyboard we'll delete the selection's content :
Next we could use the Free Selection tool to select the rest of the nodal rotator still visible on the image :
Using again the Delete key we are in condition to delete the selected area :
No trace of the nodal rotator is left in this layer. To deselect the area we'll click anywhere while the selection tool is still active :
It is time to save the new file by displaying the File menu and clicking on Save As :
In the window that opens we must choose a location, format and name for the new file. We recommend to create the new file with a totally new identity to keep the source file intact in case we may need it to repeat this edition :
The file we have created to replace our first nadir shot is in the required location and looks like this :
Next we'll repeat all the detailed process for our second nadir shot :
This is what our second image looks like when opened with Gimp :
This is how the image created from it looks like in Gimp :
And this is what the created file looks like :
If we have choosen a different location, we can now move the files we just created to the folder where the original nadir shots are togheter with the rest of the panorama's shots :
All that remains is to remove from this folder the original source nadir shots, which have now been replaced by the images with tranpsarent background we have created :
Before creating our Spherical Panorama from these images we'll see an alternative to the process described in this page, using for it one the world's most popular image editors.
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With any camera
360 Degree Interactive Panoramas
In Three Easy Steps
After reading this tutorial you'll be able to create your first 360 degree interactive photography with the camera you already have :
1 - Photograph
Take one or more pictures of the place you want to show.
2 - Edit
Convert your pictures into 360 degree panoramas.
3 - Publish
Make your panoramas interactive and available to the world on the internet.
If a picture is worth a thousand words, a 360 degree interactive panorama is worth a thousand pictures...
Online Virtual Tour Creator
Using the online virtual tour creator you can :
Convert your 360 degree pictures to virtual tours with a single click.
Insert your virtual tours into web sites, emails, blogs or wherever you like by just copying and pasting a text.
Know in a practical way all kinds of 360 degree pictures.
Discover that you can create hundreds of interactive virtual tours just as easily as you take pictures with your camera.
Check that with just one click from your camera and another click from your mouse it is possible to create a 360 degree interactive virtual tour out of nothing. And completely free of charge!!!
You can get started right now, even if you don't have a camera
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