Layers and Transparencies

DM
Posted By
doctor_meticulous
Jun 24, 2004
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452
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6
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Closed
Hi.

I have two images that I am trying to compare, using the layers menu in PhotoShop. As I don’t have the program myself, I have tried sending these two pictures to various people, but with no success.

Here are URL’s for the pictures, in case anyone wants to try it —

1: http://astronomy.swin.edu.au/~pbourke/povray/marspole/

2: http://ltpwww.gsfc.nasa.gov/tharsis/utopia.jpg

The first layer, using the top picture at URL #1, should be rotated by about 84 degrees clockwise. The windmill-shaped topography in the center of layer #2 should be transparent, so that it can be compared to the shape of layer #1.

Best of Luck 🙂
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O
oneofmany
Jun 24, 2004
In article ,
(Kevin M. Kirby) wrote:

Hi.

I have two images that I am trying to compare, using the layers menu in PhotoShop. As I don’t have the program myself, I have tried sending these two pictures to various people, but with no success.

I’m sure some generous soul will do your work for you. It’s trival as hell.
E
edjh
Jun 24, 2004
Kevin M. Kirby wrote:

Hi.

I have two images that I am trying to compare, using the layers menu in PhotoShop. As I don’t have the program myself, I have tried sending these two pictures to various people, but with no success.
/snip/

Why don’t you download the demo from the Adobe site?

—
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Comics art for sale:
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PW
Pjotr Wedersteers
Jun 24, 2004
"Kevin M. Kirby" wrote in message
Hi.

I have two images that I am trying to compare, using the layers menu in PhotoShop. As I don’t have the program myself, I have tried sending these two pictures to various people, but with no success.
Here are URL’s for the pictures, in case anyone wants to try it —
1: http://astronomy.swin.edu.au/~pbourke/povray/marspole/
2: http://ltpwww.gsfc.nasa.gov/tharsis/utopia.jpg
Kevin, I am having a look at these and I think more handiwork is needed and transparency isn’t perhaps what you are looking for per se. The mars globe graphic doesn’t show the pole from a nice top view, which would make it close to an ortographic projection. I may be able to properly resize and position one’s center on top of the other but that would not necesarily give a nice overlapping result.

What is the intended goal of having these two pics superpositioned ? If you want to show misaligned bits on the map (ie differences between photoreality and the drawn map there may be better overlay methods. If you have some more info and perhaps an orthagonal picture of the mars pole that would make things easier no doubt.

Regards
Pjotr
DM
doctor_meticulous
Jun 24, 2004
What is the intended goal of having these two pics superpositioned ? If you want to show misaligned bits on the map (ie differences between photoreality and the drawn map there may be better overlay methods. If you have some more info and perhaps an orthagonal picture of the mars pole that would make things easier no doubt.

Regards
Pjotr

Pjotr,

Thanks for your comments and questions. The purpose of this graphic is not to superimpose over the current polar position, but to demonstrate that the pole was originally located in the basin at the center of the globe image. The name for this effect is polar wander.

Thanks,

Kevin
DM
doctor_meticulous
Jun 24, 2004
edjh …
Kevin M. Kirby wrote:

Hi.

I have two images that I am trying to compare, using the layers menu in PhotoShop. As I don’t have the program myself, I have tried sending these two pictures to various people, but with no success.
/snip/

Why don’t you download the demo from the Adobe site?

The only computer I currently own is a pocket pc.
DM
doctor_meticulous
Jun 24, 2004
(one_of_many) wrote in message news:…
In article ,
(Kevin M. Kirby) wrote:

Hi.

I have two images that I am trying to compare, using the layers menu in PhotoShop. As I don’t have the program myself, I have tried sending these two pictures to various people, but with no success.

I’m sure some generous soul will do your work for you. It’s trival as hell.

That is encouraging. It seems to difficult for most people, and I can’t seem to access a computer to try it myself. Also, this project may be trivial, but it is also the solution to The Martian Crustal Dichotomy!! 😉

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