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spontini
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by spontini » Fri Jul 22, 2011 11:19 pm

Bonjour, y a-t-il une procédure spéciale dans PTP pour éviter la déformation de l'image et obtenir une ligne d'horizon parfaitement droite à  l'écran ou bien faut-il procéder de la même façon qu'en utilisant Pano2Vr, c'est à  dire créer une zone noire au dessus de l'image pour faire en sorte de la ligne d'horizon se trouve au milieu de la hauteur de l'image.
Voir l'image avec ce lien : http://www.s266079263.onlinehome.fr/editeur-3D-PTP-1-6-0-RC-2.jpg

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by mediavets » Sat Jul 23, 2011 7:04 am

spontini wrote:Bonjour, y a-t-il une procédure spéciale dans PTP pour éviter la déformation de l'image et obtenir une ligne d'horizon parfaitement droite à  l'écran ou bien faut-il procéder de la même façon qu'en utilisant Pano2Vr, c'est à  dire créer une zone noire au dessus de l'image pour faire en sorte de la ligne d'horizon se trouve au milieu de la hauteur de l'image.
Voir l'image avec ce lien : http://www.s266079263.onlinehome.fr/editeur-3D-PTP-1-6-0-RC-2.jpg

You need to set the input pano FOV values correctly, particularly the vertical offset.

The correct values can be found in the custum Kolor EXIF tag in the pano image if you stitched and renedered it using APP/APG.

If you use the stitched image as it comes from APP/APG without any post-processing then PTP should read that custom EXIF tag and automatically set the correct values.

If post-processing has removed the custom Kolor EXIF tag you will have to enter the correct values manually.






Andrew Stephens
Many different Nodal Ninja and Agnos pano heads. Merlin/Panogear mount with Papywizard on Nokia Internet tablets.
Nikon D5100 and D40, Sigma 8mm f3.5 FE, Nikon 10.5mm FE, 35mm, 50mm, 18-55mm, 70-210mm. Promote control.

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by spontini » Sat Jul 23, 2011 9:25 am

MediaVets Hello and thank you for your reply. This method is very interesting and the result is optimal. Can you tell me what are the "!" (exclamation points) located at the field level "Horizontal" and "Vertical" ?
View original here : http://www.s266079263.onlinehome.fr/decalage-vertical-APP.jpg
This is a panoramic image which has no Nadir, not Zenith.
Thank you very much for your help. Sponti

Bonjour MediaVets et merci pour votre réponse. Cette méthode est très intéressante et le résultat est optimal. Pouvez-vous me dire à  quoi correspondent les "!" (points d'exclamation) situés au niveau des champs "Horizontal" et "Vertical" ?
Voir l'image dans ce lien : http://www.s266079263.onlinehome.fr/decalage-vertical-APP.jpg
Il s'agit d'une image panoramique qui ne comporte pas de Nadir, pas de Zénith.
Merci infiniment pour votre aide. Sponti

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by mediavets » Sat Jul 23, 2011 10:07 am

spontini wrote:MediaVets Hello and thank you for your reply. This method is very interesting and the result is optimal. Can you tell me what are the "!" (exclamation points) located at the field level "Horizontal" and "Vertical" ?
View original here : http://www.s266079263.onlinehome.fr/decalage-vertical-APP.jpg
This is a panoramic image which has no Nadir, not Zenith.
Thank you very much for your help. Sponti

These are just warning symbols to indicate that PTP has failed to find the custom Kolor EXIF tag and that the HFOV and VFOV and vertical offset values are probably incorrect and so the user should check and enter the correct values manually.

In the screenshot below I have post-processed the pano image I used before to remove the custom Kolor EXIF and you can now see that a yellow warning triangle is displayed (rollover with the mouse to display the message box) and that the [!] alert symbols appear beside HFOV and VFOV in the Input Field of View data.

Here's how it works if the Kolor EXIF tag is missing from the input image:

1. If the input pano image is equirectangular (has a panoFOV of 360x180 and an aspect ratio of 2:1) then PTP will assign the correct values - HFOV 30, VFOV 180 and Vertical offset 0.

2. If the input pano image is not equirectangular then PTP will assign a HFOV of 360 and calculate a VFOV value based on the aspect ratio of the image. This may be correct if the input image does indeed have a HFOV of 360, but in many instances the values assigned will be incorrect, and PTP cannot guesstimate the Vertical offset correctky if it is not zero, and the user should enter the correct values manually. That's why PTP shows the alert symbols - to warn the user. When entering VFOV and HFOV values manually you need only enter one of them correctly and PTP will calculate the other based on the aspect ratio of the image.


Last edited by mediavets on Sat Jul 23, 2011 1:56 pm, edited 1 time in total.
Andrew Stephens
Many different Nodal Ninja and Agnos pano heads. Merlin/Panogear mount with Papywizard on Nokia Internet tablets.
Nikon D5100 and D40, Sigma 8mm f3.5 FE, Nikon 10.5mm FE, 35mm, 50mm, 18-55mm, 70-210mm. Promote control.

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by mediavets » Sat Jul 23, 2011 10:12 am

Did you know that you can upload images directly with your post/message?

Instead of using the Quick Post message box use Post Reply (or Quote if you are replying to a message you wish to quote) and then below the message entry box you will find the feature that allows you to upload images with your post /message.

Images are displayed in the sort order of their filenames - so you can determine the order in which they are displayed by prefixing the filenames with numbers - eg. 1-filename.jpg, 2-filename.jpg and so on.




Last edited by mediavets on Sat Jul 23, 2011 10:12 am, edited 1 time in total.
Andrew Stephens
Many different Nodal Ninja and Agnos pano heads. Merlin/Panogear mount with Papywizard on Nokia Internet tablets.
Nikon D5100 and D40, Sigma 8mm f3.5 FE, Nikon 10.5mm FE, 35mm, 50mm, 18-55mm, 70-210mm. Promote control.

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by spontini » Sat Jul 23, 2011 1:17 pm

MediaVets Hello, thank you for your explanations are very clear and understandable despite the fact that we did not speak the same language. I understand the actions and effects of these three parameters of FOV.
For images, I always used to store them on my server and to associate them with a link, but the next time I will try directly through the forum.
Thank you again for your help. Best regards. SPONTI

Bonjour MediaVets, merci pour vos explications qui sont parfaitement claires et compréhensibles malgré le fait que nous ne parlions pas la même langue. J'ai bien compris les actions et effets de ces trois paramètres de FOV.
Pour les images, j'ai toujours eu l'habitude de les stocker sur mon serveur et de les associer à  un lien, mais la prochaine fois, j'essaierai directement par l'intermédiaire du forum.
Merci encore pour votre aide. Très cordialement. SPONTI


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