[Image stack for long exposure - problem]

On 9/11/2019 at 2:04 PM, MEB said:

H Pietrach,
Yes, I've started checking this yesterday but I'm still working on it/would like to take a deeper look at this. 
I will get back to you soon. 

@MEB can I please ask for some feedback on this issue?

[Image stack for long exposure - problem]

@MEB any update on this one? I am still struggling with this issue.

[Image stack for long exposure - problem]

@MEB did you manage to look at these alignment issues?

Thank you

[Blending images]

Open one image, and then go file/place, and select the other one.

[Image stack for long exposure - problem]

29 minutes ago, firstdefence said:

Why did you go for a stack? I wonder if you wouldn't have gotten a more evocative powerful image with an actual long exposure.

I would I agree, but at that time I did not have an ND filter with me. Sometimes I also use this technique if it is very windy and risk of camera movement to high, despite the tripod.

[Image stack for long exposure - problem]

2 hours ago, John Rostron said:

My guess is that there are too many soft edges (clouds, waves) and not enough hard edges (rocks, mountains) for the auto alignment to work properly. (Or at least in Affinity Photo.) There seems to be a related problem in auto aligning astronomical images.

John

If this is the case, then it is extremely disapointing, as this image is not, by any stretch of imagination, lacking features which the software could use for alignment. Especially that the individual images were pretty much aligned any way.

Auto Alignment is a must for me. Enough to be a deal-breaker.

[Image stack for long exposure - problem]

19 minutes ago, MEB said:

Here's the upload link. Thank you for your support.

Files uploaded

[Image stack for long exposure - problem]

Happy to use your link. Please provide.

[Image stack for long exposure - problem]

Hi 

i have a series of nearly 40 images taken from a tripod each at 1/15sec. I wanted to stack them, align, and use Median stack to mimic a long exposure. This works flawlessly in photoshop, but I get all sorts of problems in AP. I do file, stack, select auto align, and on you go. The effect, with Median selected is very poor. Not only there is no or very little movement (long exposure) visible in the clouds, but also the images are more miss-aligned than they were comparing to manual stacking in layers.

This is the resulting image from auto stack in AP (APauto-fail.jpg). 

This is an image where I manually blended all 39 images placed on individual layers, without any alignment for images - as AP does not allow to auto align layers without using a stack as far as I know.

Am I doing something wrong? All images are exactly the same size.

[Loss of sharpness]

2 hours ago, IanSG said:

Rather than pulling the top corners out you could try pushing the bottom ones in.

Whow, so simple yet effective. Thank you.

[Loss of sharpness]

Thank you for the advice. I will try to shoot more "vertically"

[Loss of sharpness]

1 hour ago, R C-R said:

The loss of sharpness is due to using the Perspective Tool, which substantially increased the size of the tower. That required resampling the image to create pixels that were not there in the original image. Below is a comparison of part of the tower from each image, with the original on the left. You can clearly see that the tower is much larger than it originally was.

 

Thank you so much. i anticipated such answer. So there is nothing I can do about this. Do you know of any other methods of correcting the verticals without stretching the image and the pixels?

 

thanks

[Loss of sharpness]

Original JPEG as came out from Capture One. I am happy with sharpness here. 

https://drive.google.com/open?id=1FeLg_oTQdbBSYoNui88vrN0FGZOjxRgL

 

Image edited in Affinity. Above photo was opened in Affinity, Perspective tool used to correct verticals (Planes: Single Plane; Mode: Destination) then Apply. Then Export to JPEG at 100%. nothing else. When you look at 100% at the detail on the tower, you will notice a clear difference.

https://drive.google.com/open?id=1lIu6E1Vwbdln8m2PeWPpgYhRfp98caY1

 

Thank you.

[Loss of sharpness]

Absolutely, i am happy to sendn you both, before and after edit. I will do this tomorrow the first thing. Thank you.

[Loss of sharpness]

Hi I am using Capture One for RAW, export either JPEG or TIFF and then further edit in Affinity (since yesterday - I am new to Affinity). However, when I edit perspective in Affinity to make verticals vertical  , and then export as JPEG as 100% there is a significant loss of sharpness on the entire image. This happens regardless if TIFF or JPEG is edited.

 

Any ideas why?