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3 Messages

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514 Points

Wed, Apr 27, 2011 1:17 PM

34

Lightroom Classic: Better auto stacking for bracketing, HDR, and panoramas

I currently shoot a lot of Bracketed shots for exposure blending, and with each shot having a different shutter speed the auto-stacking can fail to accurately stack the grouped shots - especially when the shutter speed gets up into 10+ seconds!I would love an option for Auto Stacking to work on the time delay between the shutter closing and the shutter opening again, so it is a true measure of the gap between shots. In this way I can auto-stack on all bracketed shots even when the shutter speed is seconds long. Calculate the time between shots by adding the shutter speed to the capture time of the first shot, and then compare this to the capture time of the next shot, and if I am using Continuous shooting, this gap will be only a fraction of a second, regardless of the shutter speed.Gary

Responses

161 Messages

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3.2K Points

3 years ago

This reply was created from a merged topic originally titled Better auto stacking.

well I guilted myself in to collecting data rather than real work (ok I was already procrastign commenting here)

 lightroom only shows the seconds in capture time (see here where they say they use difference in capture time https://helpx.adobe.com/lightroom/help/grouping-photos-stacks.html#WS4FA9631A-25CC-43e2-B3E2-20FC80E... )
on a landscape panorama where I wasn't in a hurry because nothing was moving (where I was shooting 0, -2, +2) on a 5ds r with a slow buffer

autostack group 1
1 - 3:14:47
2 - 3:14:47
3 - :47
4 - :48
5 - :48
6 - :49
7 - :50
8 - :50
9 - :50

autostack group 2
:52
:52
:52
:53
:53
:53

group 3
:55
:55
:55
:56
:56
:56

group 4
:58
:58
:58
:59
:59
:00
:01
:01
:01
:02
:03
:03
:04
:04
:04
:05
:05
:06
:06
:06
:07
:08
:08
:08

all of these exposure speeds were ~1/100th of second so provides no data on whether these use start or stop (and if they don't have access to sub second timing, then irrelevant)

I guess the fundamental issue is that I wish this set was bracketed by 3, so I could see the panorama in the grid, rather than being grouped in to sub batches. If I increase the interval to more than 1 second, say 10 seconds, since it's processing the entire folder, i starts to combine non bracketed pictures that aren't panoramas together.

The time taken to try different settings, and then get close then check and unstack (and change the stack if one is put in the wrong group) seems to add up to more than the time savings for me.

If I could select a group of images (without moving them to another folder) and run autostack on the selection, that would help some https://feedback.photoshop.com/photoshop_family/topics/lightroom_auto_stack_by_capture_time_use_curr...

also if they don't want to implement algorithm to try and figure out bracketing sequence (say 0, -, +, vs, -,0,+) ability to select a group of images and stack in groups of n

Note: This conversation was created from a reply on: LR Intelligence: Stack shots based on time and overlap. Process HDR and pano acco....

409 Messages

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7.7K Points

3 years ago

This reply was created from a merged topic originally titled LR Intelligence: Stack shots based on time and overlap. Process HDR and pano acco....

LR needs to get smart. With a single command, LR could look at photo times and stack HDR and panos. It could then do feature recognition to determine if a shot has overlap [HDR] or if it's panning [Panoramic]. Done. Let me drink my coffee, come back and deliver my photography. 

161 Messages

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3.2K Points

3 years ago

This reply was created from a merged topic originally titled Lightroom: Create stack in groups of N.

Since the automatic stacking doesn't work well for me, I'd really like to be able to select a range of images and create stacks in a consistent group. i.e. group bracketed shots in to stacks of 3. Or maybe I was shooting high contrast situation and I know I want to group that entire set in to stacks of 7.

Select stack of images.
Choose Photo | Stacking | Group in to stacks of ...
dialog pops up, I enter 3, hit ok.

every 4th photo is the top of a new stack.

6 Messages

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132 Points

3 years ago

I would like this as well - would be a big help if i could just tell it to stack every X number of photos

4 Messages

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132 Points

3 years ago

This reply was created from a merged topic originally titled Stack photos in stacks of X in LRClasicCC.

When creating stacks have ability to select large set of photos and then Make Stacks Of Size X.  When doing bracketed photos for panos the time difference between last of three bracketed photos and first of next set may be only a second or two.  Can't separate by time. But could separate into stacks of three (or whatever).

38 Messages

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850 Points

2 years ago

This reply was created from a merged topic originally titled Auto Stacking - take exposure time into account to improve it a lot.

Imagine you are a landscape photograper, using a longish shutter speed (1, 3, 10 seconds etc.)

I use exposure bracketting, so the images are shot almost immediately one after another, but the Auto Stacking has serious issues with it. It thinks that seconds shot was captured 10.2 seconds after the first, but in reality the first shot took 10 seconds to take and then there was just a 0.2 second delay.

It would be great if Auto Stacking compared end of previous photo and start of the next one (instead of comparing just the starts of the photos). It would have much better idea of what was actually going on.

Thanks!

5 Messages

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160 Points

a year ago

Any chance that we can restart requesting the auto stacking feature that LR is missing, ie select a group of images and request these be stacked into groups of n. It would be up to the user to ensure s/he selected the correct number, ie an integer multiple on n, although LR could easily check this ;-)

22 Messages

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352 Points

a year ago

This reply was created from a merged topic originally titled Automatic Bracket Stacking.

A feature to automatically stack photos before merging. The new HDR batch feature added in version 8.4 isn't useful from a time savings perspective. It actually introduces two extra steps to create a merged file, (first create the stack, then select all Stacks for the merge).

Why couldn't Adobe create an automated merge process where you simply select all photos you want merged and then define how many photos there are per bracket? It could then use that information to automatically create Stacks and perform the merge based on that. Other HDR programs do something similar automatically.

14 Messages

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376 Points

a year ago

This reply was created from a merged topic originally titled Batch Stack Images.

It's great that you have enabled batch processing of HDR and Pano images. A great next step in efficiency would to be able to auto-stack an entire folder of bracketed images.

Often I have very large folders of images that are full of bracketed images of the same sequence quantity. To use the nice batch HDR merge feature, I first need to manually stack hundreds of images to use that feature. I wish I could just select all and choose an option to auto-stack "every x images" where "x" is user defined. 

4 Messages

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104 Points

9 months ago

Auto-stacking by number of pictures would seem to be so simple to implement. I'm coming from Corel's much inferior Aftershot, which DOES have this feature. Surprised to see that LR doesn't!

143 Messages

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2.9K Points

9 months ago

Cannot believe this is such an old thread ... and the problems are still there!

16 Messages

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282 Points

a month ago

Auto stacking for HDR should be rather simple, check change in exposure, in particular shutter speed, small time step between the end of the one image and the start of the next.  Look for groupings of 2, 3, 4, 5 with predictable set of changes in shutter speed.  Might even do a quick comparison of the images to assure that they overlap (or batch process).

 

Auto stacking for focus stacking and panoramic is harder but doable if overlaps are checked.

22 Messages

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352 Points

Yes... and if the comparison doesn't work programmatically, then ask the user how many images are in each bracket. 

25 Messages

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580 Points

a month ago

One thing that would be a big help would be for camera manufacturers to tag the bracketed shots, perhaps with an index number and maybe even an indication of what kind of bracketing is in use.  Then LR could accurately stack those bracketed shots.

 

This would not cover all cases, but then again neither can auto-stacking hope for that.   

16 Messages

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282 Points

@pecohen If not automatically adding a tag, let me flag the first (and perhaps the last image) of a series

43 Messages

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408 Points

a month ago

Solution: In View/View Options/Library View Options/Grid View/Expanded Cell Extras I choose, as one of the 4 options, to show "Exposure Bias" in the Grid. This way I can see images, in Grid View, with the sequence -2, -1, 0, 1, 2, in a 5-shot HDR bracket, then I know they go together, even if auto-stacking fails. The other tip is to "shoot your hand" before and after a bracket, HDR or Panorama, to make sure when you get them into LR you know when it starts and when it ends, then after you stack just delete the hand shot. "Hand shot tip" courtesy of Justin Reznyck on Lynda.com.

43 Messages

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408 Points

 
See the "-1" in the upper left hand corner? Now I know it should be in an HDR stack.

6 Messages

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132 Points

Not really a solution, more like a work-around. But a useful one until adobe implements better automatic handling of brackets.

3 Messages

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80 Points

9 days ago

What we need is stacking with fix amount of pictures. When i shot virtual tours in a DSLR i set my braketing to 5 or 7 images. sometime my exposure will be 1/30 and next image is 3 secs

 

having the ability to set fix number fix images per stack would help us a lot. 

Note: This comment was created from a merged conversation originally titled Better staking option