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  1. Galleries
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  3. Astrophotography
  4. » E 'born a Galaxy 2

 
E 'born a Galaxy 2...

Notturni

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E 'born a Galaxy 2 sent on August 25, 2014 (13:52) by Lucaliuk. 4 comments, 1069 views.

, 20 sec f/4.0, ISO 4000, tripod.

Questa versione l'ho unita in PTgui con proiezione Stereografica con evidenti problemi di Blending tra le foto...e non solo :-(





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avatarjunior
sent on August 25, 2014 (14:05)


This comment is too long to be automatically translated, so it will be shown in its original language (Italian)  

Click here to translate the comment in English [en]


Ciao a tutti,
questa seconda versione (la prima è questa: www.juzaphoto.com/galleria.php?t=988286&l=it) la preferisco dal punto di vista compositivo e la proiezione stereografica della pano valorizza bene la via lattea.
Però sono evidenti problemi nello stitching con PTgui Triste non tanto dal punto di vista dei punti di controllo quanto di blending ... e non solo.
Gli scatti 1 e 2 (i primi a sinistra) sono stati alterati da PTgui (più rumore, più contrasto, blu più saturo) e si vede un salto di resa tra la foto 1 e 2 (a circa un quarto da sx) e tra la foto 2 e 3 (a circa metà del fotogramma).
A 1200 px magari non si nota un granchè, ma l'immagine è inutilizzabile a volerne fare un bell'ingrandimento.
Ho fatto un sacco di prove...ma niente.
Dopo tanti anni che uso PTgui...è la prima volta che mi tradisce e mi combina un casino simile. E' anche vero che è la prima volta che faccio una panoramica notturna.

Qualche altro utilizzatore "sgamato" di PTgui sa mica cosa potrebbe essere? e come risolvere?

Ciao e grazie mille
Luca

Hello everyone,
this second version (the first is this: [URL =] www.juzaphoto.com/galleria.php?t=988286&l=it ), I prefer the point of view of composition and the stereographic projection of the pano enhances well the Milky Way.
But are obvious problems with the stitching PTgui:-(not so much from the point of view of the control points as blending ... and beyond.
The shots 1 and 2 (the first on the left) have been altered by PTgui (more noise, more contrast, more saturated blue) and you see a jump in performance between photo 1 and 2 (about one-fourth from left) and between the picture 2 and 3 (about half of the frame).
At 1200 px maybe you do not notice much, but the image is unusable in wanting to make a bell'ingrandimento.
I did a sacco evidence ... but nothing.
After so many years that I use PTgui ... it's the first time that he cheats on me and I combines a mess like that. It 'also true that it is the first time I make a panoramic night.

Some other user "caught on" to PTgui mica knows what could it be? and how to solve?

Hello and thank you very much
Luca

avatarjunior
sent on August 25, 2014 (14:22)


This comment is too long to be automatically translated, so it will be shown in its original language (Italian)  

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Ecco quì un dettaglio dei punti dove si nota che le diverse immagini hanno una resa diversa:





Più evidente tra le immagini divise dalla riga rossa più a destra.

Here we have a detail of the points where we note that the different images have a different yield:





Most noticeable among the images divided by the red line to the right.

avatarsenior
sent on September 05, 2014 (8:21)


This comment is too long to be automatically translated, so it will be shown in its original language (Italian)  

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mi permetto un osservazione puramente estetica...
è così bella e ben riuscita che sembra di essere lì con il naso all'insù a godersi questo meraviglia della natura;-)

ciao ciao Salvo:-P

purtoppo non sono in grado di aiutarti per il problema che hai esposto in quanto uso altri software per ppTriste

I allow myself a purely aesthetic observation ...
it is so beautiful and well done that it seems to be there with the nose to enjoy this wonder of nature;-)

hello hello Salvo:-P

unfortunately they are not able to help you with the problem you are facing as they use other software for pp:-(

avatarjunior
sent on September 05, 2014 (16:14)


This comment is too long to be automatically translated, so it will be shown in its original language (Italian)  

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Ciao Salvo,
grazie dell'apprezzamento.

Nel frattempo ho scoperto, senza ombra di dubbio, che la causa è il gradiente di luminosità tra le diverse foto, causato dal repentino cambiamento di luce tra un'immgine e l'altra.
In sostanza non c'è nulla da fare, a parte provare con una correzione selettiva dell'esposisizone delle varie immagini per cercare di uniformarle...e la prossima volta aspettare che la luce si sia stabilizzata MrGreen

Ciao
Luca

Hello Salvo,
thanks of appreciation.

In the meantime I found out, without a shadow of doubt, that the cause is the gradient of brightness between the different pictures, caused by the sudden change of light between un'immgine and another.
In essence there is nothing to do, except to try a selective correction dell'esposisizone of different images to try to standardize them ... and next time wait until the light is stabilized:-D

Hello
Luca


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