What is the easier way to know the perspective and horizon line of a shot other than guessing and eye-balling it?

I am a little unsure of what you are asking here. Do you mean how do you level an image when there is no visible horizon?

yes YerPalAl, that's what i meant

In that case I align a vertical edge.

If that doesn't work,

Duplicate layer>Free Transform>wiggle it back and forth until it looks right to the eye.

you can try this.It even works after drinking a mickey of whiskey

Thanks guys for the reply but i don't think i'v clearly put my question.

Let's say picture 1 is shot in low angle and picture 2 is shot in high angle, it'll be impossible (at least for me) to put the two pictures together and make it believable because of the different horizon line. My question is: What other tools/techniques are available to know that two pictures are taken in different angle other than guessing/eye-balling them, even if the variance is not that extreme? and what tool/technique can i use to match the perspectives of the two pictures in order to use them in the same scene/composition and make it believable?

Thanks.

I think you are referring to trying to integrate two images with different perspective view points into one coherent image...my suggestion is to keep searching for external images with similar perspectives if not then try and use the various transform tools... perspective,distort and maybe warp tool ,to reshape the images you need to the correct perspective for a coherent integration into the final image...you may even have to cutout and reshape individual objects in the images to get things right...quite tricky and time consuming...better to find two images with the same perspective

Thanks for the tip Luxwiz

Here's a chop I did quite a few years ago in which I did something similar as to what you are inquiring about here.I changed the perspective of the whole source image from a looking down perspective to a more straight on view.As you can see it took a lot of transforming different individual parts of the original to get it right,well not perfect but pretty close...

http://photoshopcontest.com/view-entry/131195/hostal-la-posada.html

original source:



my chop:

I am surprised that PS doesn't have integrated perspective assistant tool yet, but there is a workaround with polygon tool. It's mostly used for drawing but basics of perspectives are mostly the same.
Here is a quick tutorial to see what I mean:
[youtube]http://www.youtube.com/watch?v=bGhZNrtOxs0[/youtube]

Right click on Custom Shape Tool - choose Polygon - type 99 sides - open shape icon menu on top and check Star - turn off "smooth corners" and "indent sides" 99%

[quote="Luxwiz"]Here's a chop I did quite a few years ago in which I did

Impressive work Luis!!

[quote="Luxwiz"]

Right click on Custom Shape Tool - choose Polygon - type 99 sides - open shape icon menu on top and check Star - turn off "smooth corners" and "indent sides" 99%

Is that an order?

Here is my entry, "Falling Down", from the same contest:



Please note that I did nothing to change the horizon or the perspective or the point of view. I did, however, kill or seriously injure Michael Douglas.




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yeah , funnnnnnnnnnnnnnnn and good shopping work