Adding a nadir logo with text

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Revision as of 18:48, 17 April 2005 by Pitdavos (Talk)

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Contents

For what it is...

The equirectangular projection is the starting point of several products.
This projection is extermly streched at zenith and nadir. An insertion of
a logo text isn't possible in one go or it looks distorted. in this tutorial
I show you a way to create such a remapped text that can be inserted directly
in an equirectangular panorama. The other advantage is that with this text you
don' need to remap the whole panorama. Every transformation results in quality
loss.


What do we need...

  • Photoshop or a software that can run Photoshop actions (f. e. Gimp Win, Mac OSX, Unix )
  • An equirectangular panorama (PSPhere, f. e. 6000 x 3000 pixels)
  • Panotool plug-in for Photoshop created by Thomas Niemann (download here)
  • Batch file to produce faces from an equirectangular pano(Pano2Faces.bat) and vice versa (Cube2Pano.bat) from Eric Gerds (download here)
  • Photoshop action to create the mirror ball cap with white text plate (download cap_text.atn)
  • Logo text as Photoshop file (download LogoText.psd)

Creating a pano with nadir cap

For this step you need the Photoshop action cap_text.atn to produce the
white plate for the logo text.

CapText 001.jpg

You have to stop the action when you areasked for the remapped text file.

CapText 002.jpg

Keep in mind the original size of your panorama (f. e. 6000 x 3000 pixels)
You will need this value later.


After this step the modified panorama looks like this:

CapText 003.jpg


You see a white area where the logo text will be inserted.


Remapping nadir

Here you can find two different ways to extract the nadir view for inserting a logo:

1.) With Panotools Plugins
2.) With extracting cube faces


Remapping nadir with PanoTools Plugins

First turn canvas by 180 degree:

CapText 004.jpg


Run Panotools plugin PTremap (Filter > ePaperPress > PTRemap):

CapText 005.jpg


With these settings and values below:

CapText 007.jpg


When you hitting button Prefs (Image above) it should look like this:

CapText 006.jpg

Whith these settings the remap plugin saves the remapped image in a new file.
This is really important because with every transformation of the panorama it
will loose quality. In this step we need only to see the mesure of the white
plate to transform the logo text to the right size.


The remapped view in which you can see the small white circular plate in the middle:

CapText 008.jpg


And here with a closer look:

CapText 009.jpg

You can see here also the 50 % grid of Photoshop which is a really good helper to align the circular text.
As you can see the crossing of the grid is exactly in the middle of the sphere.

Now it's time to be creative and think about your logo text.
Or you take the way trough an additional method to extract the nadir view.





Remapping nadir with extracting cube faces

First of all, save panorama with a new name to the folder,
where you also will find the resulting faces from these steps.
In my case I use the name Entry_plate.tif:

CapText 028.jpg



Open Windows Explorer and choose folder where you have saved the modified panorama.
Right click on the file, go to send to... and choose Pano2Faces.bat to
extract six Cube faces out of the equirectangular panorama.

CapText 029.jpg



Now a dos window pops up in which you have to define the size of the cubfaces

CapText 030.jpg



According to the size of the original panorama we have a equirectangular
projection with 6000 pixel width and 3000 pixel height.

  • 6000 / 3.14 = 1910 (approx.)


CapText 031.jpg



Hit enter key and the batch file starts processing.....

CapText 032.jpg



Text 33
CapText 033.jpg

Inserting text

Open a prepared Photoshop text file to fill in like this (for download of an example click here):

CapText 010.jpg

As you can see the logo is flipped 90 degree counter clock wise.
This way the logo gets the right orientation when you remap it back to PSPhere.

Note: After changing the text to your needs you have to flatten these two
text layers to one layer!


Drag and drop this Photoshop logo file over the file with the nadir view
by holding the shift key to center the text. After this hit Ctrl+T to transform
text layer to the right size. By holding the shift+alt keys and pull on one of
the transform squares you can fit in the text to the white plate.

CapText 011.jpg


After this text transformations take a look at the layer palette in Photoshop.
Be aware that the text layer is on top and active for the next steps. This way we
we will only remap the text layer.

CapText 012.jpg


Remapping text back to PSPhere

Here you can find also two different ways to remap the logo text back to PSPhere (Eqirectangular projection):

1.) With Panotools Plugins (These steps have an addiotional transformation to the text because the plugin alter the size of the file while transforming)
2.) With extracting cube faces



Remapping text back to PSPhere with PanoTools Plugins

Run Panotools plugin PTremap (Filter > ePaperPress > PTRemap):

CapText 013.jpg


Settings for the re-transformation:

CapText 014.jpg


This is the remapped text without the pano as result from the remapping process:

CapText 015.jpg





Reduce text file dimensions

Now it's time to remember the initial size of the panorama. In this example
I took a panorama with 6000 x 3000 pixels. When you go to Image > Imagesize...
you can see a slightly different size of thies resulting remap:

CapText 016.jpg



Change the values to the inital size of the panorama you have choosen.

CapText 017.jpg



One further step is to flip canvas back by 180 degree.
The text is now on the right position at the bottom:

CapText 018.jpg




Preparing the text file for further use

The resulting text file should look like below. The only thing you see is the remapped text.

CapText 019.jpg



Note: Before you follow with the next steps you have to copy
background layer to a normal layer. Simply drag and drop background layer
over the new layer button at the bottom of the layer palette. After this
you have to delete background layer by drag and drop it over the trash bin also
at the bottom of this palette.

CapText 023.jpg

Now you are ready for the next steps...



You have to select and delete the white color with the wizzard stick tool or
with the color selection tool under menue selection:

CapText 020.jpg



In this tool select the white color with the color picker with a tolerance of 40:

CapText 021.jpg



Here you can see how the selected white area looks like.

CapText 022.jpg



Now you can just hit the delete button and you are done. Save this file with descriptive name.
(f. e. LogoTextRemapped_6000x3000.psd)




Remapping text back to PSPhere with extracting cube faces



Testing file size and position

Select the produced file with Ctrl+A (In image below: LogoTextNiaRemapped6k3k.psd)
and drag and drop it over the panorama with the white text plate by holding shift key
to center the file.

CapText_024.jpg




















Flaten the resulting image to background.....

CapText 025.jpg

.....and save the panorama with the added text (Ctrl+Shift+S):



Now you can open the saved file in a prefered viewer (f. e. PTEditor)
to see how the nadir looks like. If it looks like this.....

CapText 027.jpg

You are done. Otherwise you probably made a mistake by following this tutorial
or you have to modify the size of the text file for a better fit.



How does it works now (The fast way)

End of wiki tutorial

Images to use for tutorial (temporal)

CapText_028
CapText_029
CapText_030
CapText_031
CapText_032
CapText_033
CapText_034
CapText_035
CapText_036
CapText_037
CapText_038
CapText_039
CapText_040
CapText_041
CapText_042
CapText_043
CapText_044
CapText_045
CapText_046

Next time when you run the action on a panorama with the same size you don't have to cancel it, because you can use the above generated, remapped text file. Now you are able to produce this nadir logo in one go. You just have to guide the action to the remapped text file and your computer.

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