creating a shifted image

J
Posted By
JFox
Dec 14, 2006
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339
Replies
2
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Closed
I could use some help with Photoshop for a medical problem illustration. My daughter has Photoshop on her college computer and will be home in a few days. She just used it a little in a class and can’t do what I’m asking her to do and with test this week she can’t locate anyone to ask.

I have a visual disturbance that I’m trying to illustrate to my doctor. I have a fair amout of nystagmus but that’s not causing this problem. I have a shifted image [a halo of sorts] when I look at a bright image that sits within darkness such as a performer on a stage with a bright light on him has a raised and translucent image of himself.

At night, when I look at the double yellow lines on the road there is a translucent image of them that comes off the road to about 8-12" above the road. Yes, I’m cutting back on driving at night.

So I took a picture on a dark road with just my headlights showing the double line glowing brightly. I’d like to leave the original lines intact, but I’d like to take the image and make it close to completely transparent and drag it aside the lines and add the 2nd image which should be just about what I’m seeing. So far, what I’m explaining to the doc by phone in another city isn’t clear. He’s one of the top neuro-opthathlmologists in the country.

Any tips would be appreciated. If e-mailed, reverse the numbers in my e-mail of "1234" to "4321" My daughter said she thinks its something I need to read about layers to achieve. I don’t have the program and have no use for it, so if this is a simple task it would be great to learn how to do it and print the picture.

Thank you,
JF
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N
noone
Dec 14, 2006
In article ,
says…
[SNIP]
At night, when I look at the double yellow lines on the road there is a translucent image of them that comes off the road to about 8-12" above the road. Yes, I’m cutting back on driving at night.
So I took a picture on a dark road with just my headlights showing the double line glowing brightly. I’d like to leave the original lines intact, but I’d like to take the image and make it close to completely transparent and drag it aside the lines and add the 2nd image which should be just about what I’m seeing. So far, what I’m explaining to the doc by phone in another city isn’t clear. He’s one of the top neuro-opthathlmologists in the country.

Any tips would be appreciated. If e-mailed, reverse the numbers in my e-mail of "1234" to "4321" My daughter said she thinks its something I need to read about layers to achieve. I don’t have the program and have no use for it, so if this is a simple task it would be great to learn how to do it and print the picture.

Thank you,
JF

JF,

I’d start with your original image (call it A). Hit Ctrl-j to duplicate the Background (in italics in the Layers Palette) Layer and rename that Layer "B." At this point you will need to experiment with several aspects of Layer B to get what you see. I can only guess, but will give you some starting points to play with.

Next, I would use the Lasso Tool (Feather set to ~5px) to make a Selection of JUST the yellow lines in Layer B, as you will probably want to exclude the rest of the image for your example. Once you have made a rough Selection, Invert the Selection, then Save Selection As > Layer B Mask. This will eliminate most of Layer B from view, however, at this stage, you will not see any real change. Ctrl-t (Free Transform) Layer B, then size it up, so that it is slightly larger, than Layer A, and adjust the Opacity of Layer B. You should now see the image from the larger Layer B, but with the smaller and now more distinct Layer A below it. You will probably also want to experiment with the Move Tool, to place the mostly transparent Layer B, where you see it, and then perhaps use the Filter>Blur>Gaussian Blur to soften it some. I’d be doing a Save_As (and increment the file names up, i.e. Road Composite 01.PSD, xxxx 02.PSD, etc.) so you can go back to where you were at any one point. Only you will be able to know when what you see on screen, starts to approximate what you see in this situation at night.

When you get it where you are satisfied, do one last Save_As, then in the Layers Palette, Flatten and Print, or Save_As PDF, or similar for your Dr. Some printing software/hardware does a better job with PSD files with their Layers intact, but I find that all handle PDFs or Flattened TIFFs.

Good luck,
Hunt

PS these suggestions are for Photoshop CS/CS2, but I think that all, or most, translate back to about v5, with few changes.
J
JFox
Dec 23, 2006
Thank you, Hunt. I worked it out just fine.

JF

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