PHWinfo - Afficher un message - Adding extra images with different focal lengths to a panorama

24/02/2008, 10h46

"Benny" <no spam ple@se.com> wrote in message
news:IV2wj.18419$421.7234@news-server.bigpond.net.au...
>>> My idea is that the 50mm images will need to be reduced in size to 17/50
>>> (ie 0.34) to fit correctly into the panorama. The 35mm images would be
>>> reduced to 17/35 (ie about half) to fit into the panorama etc etc.
>>>
>>> Not too sure what to do to ensure a consistency in printable resolution
>>> by mixing images (of differing focal lengths) in this way.
>>
>> The focal length is not an issue - what matters is that you took the
>> images from the same location. You are correct about the change in image
>> size.
>>
>> One consequence of this is that you will need to double (or triple) up in
>> the vertical direction to match the field of view of your original pano,
>> and there will be keystoning issues because the vertical axis has
>> changed. To deal with that, you could get by with the transform tool, but
>> a tool such as PTGUI might save you a lot of time, since it known how to
>> align images in spite of this rectilinear distortion.
>>
>> Another issue that you will almost certainly need to deal with will be
>> color matching the sky and other objects in the panorama. One way to do
>> this is with curves, and numeric values from the info palette. Again, a
>> panorama savvy program may save you some effort here, though you can do
>> this perfectly well manually with a little effort.
>> --
>> Mike Russell - www.curvemeister.com
>>
>
> Thanks Mike
> I actually used PTGUI (for the first time) to create the pano. I will now
> look further into it's other capabilities.
> As an aside, I also created an equivalent pano using CS3's Photomerge and
> found some interesting differences in image and file sizes etc, as noted
> below.
> PTGUI produced an image size of 3490 x 1147 pixels @ 72 ppi and a saved
> filesize of 4880 KB although in CS3 the doc size and pixel dimensions are
> shown as 11.5MB.
> CS3's Photomerge produced an image size of 12681 x 4253 pixels @ 72ppi and
> a saved filesize of only 1400KB. CS3 indicates a doc size and pixel dims
> of 154.3MB. The image is about 3.6 times larger but the file is about 3.5
> times smaller???
> I will need to investigate further to sort these figure differences out.
> In CS3 when I zoom to fill window to view them both at the same screen
> size I notice that PTGUI zoom is 26.25% and CS3's is only 7.22%. I also
> need to zoom in around 300% for the PTGUI pano to obtain the same size as
> the 100% CS3 zoom. The PTGUI pano pixelates a loot sooner than the CS3
> pano. My leaning is therefore towards the CS3 pano because of this. But it
> may just be a setting in PTGUI that will resolve this issue.
> I presume with the extra images I want to insert into the pano, I will
> need to maintain the same pixel resolution (or better) as that of the
> pano?
> regards
> Benny
>

Autopano is worth checking out. I also use PTGui and CS3 photomerge. It can
be a lot of work, but who wants to sleep anyway. You can do that when you
are dead.

r.

24/02/2008, 10h46	#6
Bogus Messages: n/a Hébergeur:	Re: Adding extra images with different focal lengths to a panorama "Benny" <no spam ple@se.com> wrote in message news:IV2wj.18419$421.7234@news-server.bigpond.net.au... >>> My idea is that the 50mm images will need to be reduced in size to 17/50 >>> (ie 0.34) to fit correctly into the panorama. The 35mm images would be >>> reduced to 17/35 (ie about half) to fit into the panorama etc etc. >>> >>> Not too sure what to do to ensure a consistency in printable resolution >>> by mixing images (of differing focal lengths) in this way. >> >> The focal length is not an issue - what matters is that you took the >> images from the same location. You are correct about the change in image >> size. >> >> One consequence of this is that you will need to double (or triple) up in >> the vertical direction to match the field of view of your original pano, >> and there will be keystoning issues because the vertical axis has >> changed. To deal with that, you could get by with the transform tool, but >> a tool such as PTGUI might save you a lot of time, since it known how to >> align images in spite of this rectilinear distortion. >> >> Another issue that you will almost certainly need to deal with will be >> color matching the sky and other objects in the panorama. One way to do >> this is with curves, and numeric values from the info palette. Again, a >> panorama savvy program may save you some effort here, though you can do >> this perfectly well manually with a little effort. >> -- >> Mike Russell - www.curvemeister.com >> > > Thanks Mike > I actually used PTGUI (for the first time) to create the pano. I will now > look further into it's other capabilities. > As an aside, I also created an equivalent pano using CS3's Photomerge and > found some interesting differences in image and file sizes etc, as noted > below. > PTGUI produced an image size of 3490 x 1147 pixels @ 72 ppi and a saved > filesize of 4880 KB although in CS3 the doc size and pixel dimensions are > shown as 11.5MB. > CS3's Photomerge produced an image size of 12681 x 4253 pixels @ 72ppi and > a saved filesize of only 1400KB. CS3 indicates a doc size and pixel dims > of 154.3MB. The image is about 3.6 times larger but the file is about 3.5 > times smaller??? > I will need to investigate further to sort these figure differences out. > In CS3 when I zoom to fill window to view them both at the same screen > size I notice that PTGUI zoom is 26.25% and CS3's is only 7.22%. I also > need to zoom in around 300% for the PTGUI pano to obtain the same size as > the 100% CS3 zoom. The PTGUI pano pixelates a loot sooner than the CS3 > pano. My leaning is therefore towards the CS3 pano because of this. But it > may just be a setting in PTGUI that will resolve this issue. > I presume with the extra images I want to insert into the pano, I will > need to maintain the same pixel resolution (or better) as that of the > pano? > regards > Benny > Autopano is worth checking out. I also use PTGui and CS3 photomerge. It can be a lot of work, but who wants to sleep anyway. You can do that when you are dead. r.