Archived posting to the Leica Users Group, 2005/11/19

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Subject: [Leica] horizontal or not? Maybe it is now.
From: douglas.sharp at gmx.de (Douglas Sharp)
Date: Sat Nov 19 10:03:45 2005
References: <28511F9D-7F4F-4484-BC8D-8DD085DC648B@pandora.be> <p0623091bbfa41bc1314a@[131.142.12.152]> <3DC89F8F-AE01-432B-92E8-1AE75D809481@pandora.be> <437E7A0B.4030007@gmx.de> <148F5CD1-2925-4E59-BF1A-7BAE7DEAAA2D@pandora.be>

Hello Phillipe,
I used the evaluation version (no time limit, but I like it so much I 
will probably buy it) of DCE tools (mediachance.com) for perspective and 
manual lens correction, it's similar to PS but it doesn't require making 
an extra layer (it's faster too).
The nice thing about it is, you have a panel next to the correcting 
window which shows exactly what is happening to your image. I corrected 
by pulling the grid at the bottom of the shot out of the image frame,
I could have done it at the top but this tends to make the loss of image 
data too high in the subsequent crop- it's ok if it's only sky,you can 
fill that up with the healing brush option in PS, if there are details 
it takes too long (for me) to get it just right in PS-elements 3
For profiled lens  corrections I usually use PTlens (freeware at 
epaperpress), this also has options for straightening out fish-eye 
shots, removing chromatic aberration and vignetting effects - very 
similar to DxO but infinitely cheaper (i.e. free).
DCE tools also took care of the casts and mid-tone contrast - a very 
cleverly thought out,effective and easy to use tool box which goes into 
PS as a plug-in.
The sequence was : perspective correctionfirst, then distortion 
correction (based on a very slight curvature of the frame with the sign 
Antwerpen on top). I didn't bother doing any rotation.
Cheers
Douglas
By the way the give-away to the composite nature of the shot is that the 
shadow of the lamp-post in the left foreground should be on the armrest 
of the nearest sofa too


Philippe Orlent wrote:

> Hi Douglas,
>
> I think you nailed it just right. Could you explain me how you did  
> all this? I'd like to repeat it myself on the high res image.
> Thanks for taking out the green cast in the middle of this image, but  
> in fact I put it there myself and voluntary.
> The lens was the Vario Summicorn on the Digilux 2 set at the 35mm  
> equiv. of 28mm. For all shots.
>
> Thank you all the others for mailing me the degrees of rotation up  
> till the .01 degree sharp.
>
> Below an url that shows the initial and untouched images I started with:
> http://tinyurl.com/cxc6r
>
> And this was the result:
> http://tinyurl.com/82jq2
>
>
>
> Op 19-nov-05, om 02:04 heeft Douglas Sharp het volgende geschreven:
>
>> Philippe,
>> I couldn't resist - why do you post shots like this so early in the  
>> morning? ;-)
>> Anyway, I  looked at it from all angles, agreed, disagreed, put a  
>> fine grid over it, played around with it and took 10 minutes to  
>> tweak a couple of  things..
>> I think everything is horizontal or vertical now,  but,unfortunately, 
>> I lost a bit of the lower part by correcting the  perspective.
>> I also applied a tiny touch of manual distortion correction.(BTW  
>> what lens was it?, I may have a lens profile here somewhere to get  
>> an accurate correction)
>>
>> http://gallery.leica-users.org/New-Old-Pictures/pano   Your shot
>> http://gallery.leica-users.org/New-Old-Pictures/pano_edited_1   
>> whether it's straight I'll leave to your judgment
>>
>> I also removed a slight colour cast (but that's  maybe on my laptop  
>> TFT-screen) I couldn't be bothered firing up the big machine in the  
>> office, so if the colours are wrong blame Fujitsu-Siemens and Adobe- 
>> Gamma.
>> cheers
>> Douglas
>>
>> Philippe Orlent wrote:
>>
>>> Op 19-nov-05, om 01:09 heeft Richard S. Taylor het volgende  
>>> geschreven:
>>>
>>>> Why don't all piers have couches?  I've never seen anything like   
>>>> it. It looks like a winning idea to me.
>>>
>>>
>>>
>>> In fact, it's a shot I made today for an ad campaign for couches.
>>> It's 5 in one photos, one per couch (shot inside in dim light)  and  
>>> the pier itself around noon.
>>> The rest is PS.
>>>
>>>
>>> _______________________________________________
>>> Leica Users Group.
>>> See http://leica-users.org/mailman/listinfo/lug for more information
>>>
>>
>> _______________________________________________
>> Leica Users Group.
>> See http://leica-users.org/mailman/listinfo/lug for more information
>>
>
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>
>

Replies: Reply from philippe.orlent at pandora.be (Philippe Orlent) ([Leica] horizontal or not? Maybe it is now.)
In reply to: Message from philippe.orlent at pandora.be (Philippe Orlent) ([Leica] horizontal or not?)
Message from r.s.taylor at comcast.net (Richard S. Taylor) ([Leica] horizontal or not?)
Message from philippe.orlent at pandora.be (Philippe Orlent) ([Leica] horizontal or not?)
Message from douglas.sharp at gmx.de (Douglas Sharp) ([Leica] horizontal or not? Maybe it is now.)
Message from philippe.orlent at pandora.be (Philippe Orlent) ([Leica] horizontal or not? Maybe it is now.)