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#1 2008-09-10 17:52:38

Aeriscera
Member
From: Bath, UK
Registered: 2008-03-11
Posts: 613
Website

Manual Positioning: Image Selection and Creating Links

Hi Everyone,

I have had a good rummage through the docs but can't find an answer to either of these questions.

I have a pano with a blank area so I force APP to put all my images into one pano. Suppose there are several images that have no links.

1. APP often stacks the unlinked images in such a way that the images' numbers (in black on a grey circle in the Move Images window) are on top of each other so I can't select the images that are underneath the top one. How do I get around this?

2. When I have finished manually positioning images without links, if I forget what I am doing and press the optimise button then all my hard work is lost. One solution is to be more careful, another would be to create my own control points and links. Is there any useful way of doing this when APP can't find any control points?

Aeris

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#2 2008-09-10 18:40:40

leedsjoe
Member
From: West Drayton, UK
Registered: 2006-11-29
Posts: 478

Re: Manual Positioning: Image Selection and Creating Links

The solution I have used for panoramas that are difficult to stitch does not use move images.

The method that takes the longest but is the most reliable for me goes like this:

1) I put all of the images into a detect so as to find two or more images that are linked together as one panorama through automatic detection then delete all the other images: this is the core to which I am going to add images in turn

2) I have the candidate images displayed in another browsing application, I use Picasa. This allows me to pick out images that I know are neighbours of each other; I have a standard way of taking panoramas that helps with this sequencing.

3) I use the Add Images feature of the Panorama Editor to add in a next unlinked image that I know is a neighbour of the sub-set created at step 1)

4) Switching to the Control Points Editor(CPE) the added image will be the last in the image list, and shown in red as having no links. I select in the image list what I know is a neighbour to the new image and the new image itself, draw marquees in a selected area common to both images and choose 'Add Control Points' - if CP are not found it can help to change the CP detector in Settings to 'high'

5) When new control points have been added I then run optimisation, in the CPE

6) I return to step 3) until all the candidate images have been added.

Two comments

a) Yes, this technique is not recommended for very large panoramas; but I have used it on panos with 25-30 images

b) if no CP are found at step 4) then I look for another known neighbour and try again: if no known neighbours will link in then I am sunk - but that has not happened to me, as yet

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#3 2008-09-10 18:41:21

DrSlony
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From: London, United Kingdom
Registered: 2007-11-03
Posts: 2259
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Re: Manual Positioning: Image Selection and Creating Links

1- choose the move hand tool, hover over that stack and use your mouse wheel to select the image you want. Using "Guess unlinked image location" can also help, sometimes it works very well in fact.

2- Position them as stated in point 1, then run "Customized fine tuner", it might now find good CPs where before it found none. Or it could find CPs that have a low RMS but are in fact very wrong, so you should look through them and delete anything thats looks outright wrong. Then run optimize.

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#4 2008-09-10 18:49:21

Aeriscera
Member
From: Bath, UK
Registered: 2008-03-11
Posts: 613
Website

Re: Manual Positioning: Image Selection and Creating Links

leedsjoe wrote:

if no known neighbours will link in then I am sunk

If I understand your technique, then this is exactly the problem I am interested in. Eg typically I'll have some adjacent tiles of sky that are have some cloud structure visible, but nothing that the Add Control Points tool can use.

A

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#5 2008-09-10 18:54:29

mediavets
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From: Isleham, Cambridgeshire, UK.
Registered: 2007-11-14
Posts: 9730
Website

Re: Manual Positioning: Image Selection and Creating Links

Aeriscera wrote:

leedsjoe wrote:

if no known neighbours will link in then I am sunk

If I understand your technique, then this is exactly the problem I am interested in. Eg typically I'll have some adjacent tiles of sky that are have some cloud structure visible, but nothing that the Add Control Points tool can use.

A

If you know - cos shooting on a click stop head - or can estimate YPR values then enter them manually in YPR mode. If sky is really featureless then very precise positioning is irrelevant.

Then go to CPE (Control Points Editor) mode and hard link the images - hint: select an image and right-click.


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Last edited by mediavets (2008-09-10 20:39:22)


Andrew Stephens
Nikon D40, Nikkor 10.5mm fisheye, Sigma 8mm f3.5 fisheye, Nikkor 18-55/50/35mm lenses, Nodal Ninja 5 Lite, Nodal Ninja 4 with R-D16, Agno's MrotatorTCS short.
Nikon P5100, CP5000, CP995, FC-E8, WC-E63,WC-E68, TC-E2, Kaidan Kiwi 995, Bophoto pano bracket, Agno's MrotatorA.
Merlin/Orion robotic pano head + Papywizard on Nokia 770/N800/N810 and Windows 8/XP/2K.

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#6 2008-09-10 19:48:48

Aeriscera
Member
From: Bath, UK
Registered: 2008-03-11
Posts: 613
Website

Re: Manual Positioning: Image Selection and Creating Links

DrSlony wrote:

1- choose the move hand tool, hover over that stack and use your mouse wheel .

The mouse wheel? Is this documented? It certainly works - thanks!

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#7 2008-09-10 19:54:31

Aeriscera
Member
From: Bath, UK
Registered: 2008-03-11
Posts: 613
Website

Re: Manual Positioning: Image Selection and Creating Links

mediavets wrote:

Then go to CPE (Control Points Editor) mode and hard link the images - hint: select an image and right-click.

I think the CPE in the version of APP I have on this machine (1.4.0/Win32) is broken. When I open the CPE and select an image or a link, the two image panels  on the right hand side of the CPE window remain blank. I will investigate this further when I find time to upgrade to 1.4.whateverweareuptonow.

Thanks for your help,

Aeris.

PS Mouse *wheel* - tchoh!

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#8 2008-09-10 23:04:55

leedsjoe
Member
From: West Drayton, UK
Registered: 2006-11-29
Posts: 478

Re: Manual Positioning: Image Selection and Creating Links

Aeriscira: apologies for not reading your original post carefully enough. On re-reading, I see you had tried 'add control points' before trying the Move Image Feature. (This said, using add images to bring in unlinked images one-by-one rather than using forcing to add all unlinked images in at the same time may make for an easier workflow.)

Some matters arising which may help generally - I have just checked that these points also apply in the version of 1.9 released today.

1) about the user adding/inserting their own control points by hand: this has been often requested but is still, as far as I know, not implemented

2) the use of the mouse wheel is documented in the wiki under geometry editing within layers mode: it also appears in the help text generated when clicking on the help icon, the question mark, in the Panorama Editor, then on the layers mode icon

3) the hard link feature is a right-click on the image number in the Panorama Editor rather than the CPE but the CPE has to be 'on' in order to access hard link. Hard Link is not available with Layers Mode on, or directly in the CPE. (At this point, I feel like repeating the old request not to shoot the messenger.)

I have used the search in the wiki to see if I can find 'hard link' documented, without success, so I am not clear what benefits you get from using it - perhaps others could help out here.

Lastly, a perhaps crazy thought about handling images with very few features in them, e.g. sky with ill-defined clouds. One could use an add text feature in an image processor to locate identical markers in what you know are the same spot in the sky next to the 'same' clouds. Then APP could stitch using those markers and the user could, later, clone them out. Ok, a desperate work-around but has anyone used it successfully?

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#9 2008-09-11 00:00:04

Aeriscera
Member
From: Bath, UK
Registered: 2008-03-11
Posts: 613
Website

Re: Manual Positioning: Image Selection and Creating Links

leedsjoe wrote:

At this point, I feel like repeating the old request not to shoot the messenger.

No problem! Thanks for taking the time to help.

A

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#10 2008-09-25 07:40:15

Castillonis
Member
From: Oakland, Ca
Registered: 2008-03-06
Posts: 307
Website

Re: Manual Positioning: Image Selection and Creating Links

This is one of the areas where shooting a giga pano with a robot is an advantage because the yaw and pitch are more consistent than when shooting it manually.  I shoot a different pattern when I shoot manually and my pitch is very consistent, but my yaw has much more variance.  This has solved my problem with stitching sky which may have beautiful cloud and light patterns, but not enough details to be automatically positioned correctly.

1.  I choose to include all images in the panorama before I tell it to detect the panorama.

2.  When I shoot using a robot and I use AP Giga, I am able to edit the incorrect yaw and pitch values for pieces of the sky by looking at the yaw and pitch values for adjacent photographs.  I do not move the incorrectly positioned photos using the mouse, but I double click on the table's yaw and pitch values and enter a better value.  Then it does NOT need to reproject the entire panorama.  It only modifies the area where the photograph has moved to. (KEY for very large panoramic images)

3.  Then I tell AP Giga to optimize the color again and it looks great.

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#11 2008-09-25 12:38:21

DrSlony
Moderator
From: London, United Kingdom
Registered: 2007-11-03
Posts: 2259
Website

Re: Manual Positioning: Image Selection and Creating Links

Aeriscera wrote:

Lastly, a perhaps crazy thought about handling images with very few features in them, e.g. sky with ill-defined clouds. One could use an add text feature in an image processor to locate identical markers in what you know are the same spot in the sky next to the 'same' clouds. Then APP could stitch using those markers and the user could, later, clone them out. Ok, a desperate work-around but has anyone used it successfully?

Read http://www.autopano.net/wiki/action/vie … rce_images

This method works very well if you shoot at regular intervals (I don't use a click-stop ring, just try to shoot every 40° in the x axis). Whats more, often when APP will not stitch some images but you used the "Force all images in the same panoram" feature AND you shot using fixed intervals in a plain-shaped grid (e.g. rectangle), then you can just click on "Guess unlinked image locations" in the CP editor and APP will do a very good job of positioning them!

Here is an example of a situation where "Guess unlinked image locations" should work very well:

Code:

01 02 03 04 05 06
07    09 10 11 12
13 14 15 16 17 18
19 20          24

Here "Guess unlinked image location" might make errors because some of the rows you shot with more photos than the others:

Code:

      01 02 03 04 05 06 07 08 09 10
11 12 13 14    16 17 18
   21 22 23 24 25 26 27 28 29 30 31
      32 33 34 35 35      39 40

To make it clear, here is how the second one is supposed to look:

Code:

      01 02 03 04 05 06 07 08 09 10
11 12 13 14 15 16 17 18 19 20
   21 22 23 24 25 26 27 28 29 30 31
      32 33 34 35 36 37 38 39 40

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