What is the optimal size of a photosphere to work best with Google's pre stitched moderator?

[Edward Simms]

I tried a couple of times to pre stitched my Photospheres for Google Street View business tours with horrible results. So in order to get beautiful a tour like the ones I get when just up loading my panos to the moderator, what images size is the Google Moderator using to get these beautiful results:

Out of my camera (Canon 6d full frame) my panos are width 3648 pixels x height 5472 pixels  or width 50.667 inches x height 76 inches x 72 pixels/inch

Using HDR I am using 12 images per photosphere. I am using the AV mode on my camera which causes another problem for PTI GUI, but I will not worry about that part right now.

MY QUESTION: is what is the size of the 2:1 ratio photosphere that Google is converting my panos into, when I upload them straight out of the camera? 

I asked this because I would like for my PTI GUI images to be the same size; i.e., My pre stitched photosphere should be (X pixels) x (Y pixels) x (Z pixels/inch) to match what the Google moderator does with the images that I have been uploading in the past.

In short, what is the optimal photosphere size I must upload to Google for the best result?

[Willy Kaemena GM]

What lens are you using  on your  Canon 6D? How do you want to upload directly from the camera??  I am a bit confused about your questions.

  My photospheres have an  equirectangular size of about  10000x5000   https://www.google.de/maps/contrib/111401121014072065279/photos/@49.9334481,4.9609553,6z?hl=en

Willy

--
Many people are reading this forum via email and get every post delivered to their inbox. To limit the amount of data please do not add attachments or images to your posts; instead upload your files at a file sharing site (for example http://ge.tt/ ) and include a link in your message.
---
You received this message because you are subscribed to the Google Groups "PTGui Support" group.
To unsubscribe from this group and stop receiving emails from it, send an email to ptgui+un...@googlegroups.com.
To post to this group, send email to pt...@googlegroups.com.
Visit this group at https://groups.google.com/group/ptgui.
To view this discussion on the web visit https://groups.google.com/d/msgid/ptgui/171936d7-0be6-4cff-8722-9868db4c7154%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Erik Krause]

Am 04.02.2016 um 17:57 schrieb Edward Simms:
> Out of my camera (*Canon 6d full frame*) my *panos are width 3648 pixels x

> height 5472 pixels or width 50.667 inches x height 76 inches x 72

> pixels/inch*

You mean the images you get of your camera are 3648x5472px. The panorama
still needs to be stitched. pixels/inch doesn't matter at all. As Willy
wrote your lens would be interesting.

> Using*HDR* I am using *12 images* per photosphere. I am using the*AV mode*

> on my camera which causes another problem for PTI GUI, but I will not worry
> about that part right now.

You should use M mode (google is plainly wrong to recommend Av) and a
fixed white balance. See http://www.ptgui.com/support.html#6_3 and
http://www.ptgui.com/support.html#6_6

A recent discussion:
https://groups.google.com/forum/#!topic/ptgui/SlHACbigvio

--
Erik Krause
http://www.erik-krause.de

[Edward Simms]

I am using a Sigma  8mm Fisheye Lens

[Edward Simms]

M mode is irrelevant to my question.. but okay, I am using M mode now. 

[John Houghton]

On Thursday, February 4, 2016 at 4:57:19 PM UTC, Edward Simms wrote:

In short, what is the optimal photosphere size I must upload to Google for the best result?

You should be getting very close to 7000x3500 out of PTGui (I got 6964x3482 using camera images of your size).  I would think that's a good size to upload to Google.  There's more to image quality than mere number of pixels, of course:  eg removal of chromatic aberration and purple fringing, noise avoidance/reduction, sharpening etc.

John

[Keith Martin]

On 6 Feb 2016, at 1:27, Edward Simms wrote:

> M mode is irrelevant to my question.. but okay, I am using M mode
> now. 

Good to hear. :) The exposure control mode is indeed irrelevant to the
question of resolution but it's very important for creating panoramas at
a professional level. As Erik says, Google is plainly – unequivocably,
in fact – wrong to recommend AV mode.

k

[Keith Martin]

On 4 Feb 2016, at 16:57, Edward Simms wrote:

Out of my camera (Canon 6d full frame) my panos are width 3648 pixels x
height 5472 pixels or width 50.667 inches x height 76 inches x 72
pixels/inch

John Houghton suggests that with your lens and camera you should be able to produce finished stitched equirectangular images of around 7000x3500 pixels. BUT that doesn't mean this is actually what Google would produce if you upload your initial shots and leave the stitching to them. I must say I'm not generally that impressed with Google's stitching from a perfectionist point of view, and it's quite possible that the output is not actually correctly optimised.

FYI, the pixels-per-inch value is irrelevant; that's purely a function of how many pixels wide/tall a bitmap image is and the physical real-world size it is reproduced. Until there is a physical production scale (printed, generally) it's not possible to have a ppi value.

k

[iulianaio...@gmail.com]

Try this size:4096 x 8192
(it according with Google Street indication 4000 x 8000(

[360 Cyber Tours]

This is directly from Google Maps Help page

Equipment to use

You have two options for equipment, depending on how you use the Street View editor.

Option 1: Upload photo spheres to the Street View editor

To create photo spheres, you can use:

• A spherical camera (at this time only the NCTech iris 360 is approved for the Trusted program) or
• A DSLR camera and non-Google stitching software (i.e. PTGui or Autopano)

When using a DSLR camera, your finished photo spheres must:

• Be composed of HDR images with a bracketing of at least 2 F-stops, captured using the camera settings (e.g., white balance, ISO, etc.) outlined below.
• Have a resolution between 8,000 x 4,000 and 13,312 x 6,656 pixels.
• Have a 2:1 aspect ratio.
• Be free of watermarks and copyright information except for those outlined in the Google Maps Image Acceptance & Privacy Policies.
• Include a black nadir that Street View editor can automatically fill or manually fill with a realistic texture, or a "nadir shot" (downward shot).

https://support.google.com/maps/answer/6281095?hl=en