Super Resolution

[lepr]

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[dronecrasher]

4 minutes ago, firstdefence said:

@dronecrasher You've sparked my interest in this subject and its techniques so, just out of curiosity, what drone and camera do you use for these cool images?

 

I just purchased a mavic pro drone which comes with a built-in camera (4k videos, 12MP camera).

 

[dronecrasher]

4 minutes ago, owenr said:

 

 

The JPEG and PNG are so close to identical that I would discard the PNG since it is so much larger but providing no quality benefit over the JPEG.

 

If you mean difference between them and an image developed from the DNG, then yes. Primarily, there is far less noise in the super res image due to the averaging of the multiple source images, and it has slightly finer detail when you compare it at 100% against the single image at 200% (so their displayed sizes match).

 

 

 

 

I'll take some more interesting shots tomorrow with lots of detail in it to really notice a difference

[lepr]

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[lepr]

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[dronecrasher]

9 minutes ago, owenr said:

 

Looking forward to seeing them.

 

In the meantime, can you attach the image that you developed from the DNG that you attached earlier, please?

I'd like to more closely examine the benefit of the super resing, but don't know what develop settings you used.

 

Sure,  I attached it again

 

If it really worked/ works this would be the way to do it

 

1. ISO 100 / Burst Shot (7 Images) / RAW file
2. Import all images to Affinity Photo
3. Make adjustments in Develop Persona (save as preset and apply to all images one by one)
4. Resize image (Document - Resize Document) Replace Size with 200% ENTER and select Resample - nearest neighbor
5. Do it with all images and export as TIFF nearest neighbor
6. Open Affinity Photo - Select New Stack and select all exported TIFF files
7. Make adjustments and export as JPEG

DJI_0146.DNG

[lepr]

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[lepr]

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[dronecrasher]

1 hour ago, owenr said:

 

I have the DNG. I'm asking for the image that you developed from that DNG because I don't know the develop settings that you used.

 

 

 

 

I misunderstood you I guess. I am totally confused by now with what I've uploaded

 

developed DNG https://www.dropbox.com/s/iw8zn8l0dqe47yp/DJI_0146.png?dl=0

final JPEG https://www.dropbox.com/s/jzasi896boweerz/FINAL.jpg?dl=0 

 

[dronecrasher]

Attached is a raw developed file (left) and a final stacked jpeg (right - super resolution image)

 

Now I'm convinced that the super resolution in Affinity works.

 

I uploaded the files on dropbox

https://www.dropbox.com/s/qoeer15sc72o7su/Archive.zip?dl=0

[lepr]

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[John Rostron]

On 03/04/2018 at 5:52 PM, John Rostron said:

I have just taken a 16-shot burst and stacked them. However, I then remembered that I had image stabilization switched on, which somewhat defeats the objective! I shall try again tomorrow

I have now taken a 14-shot burst hand-held and without stabilisation. I stacked them at the original size, and at 200% using nearest neighbour. For the 100% stack, I could detect no difference between  the original images and either the mean or median of the stack. For the 200% set, the image quality was noticably poorer (from the resizing?) and again there was no improvement. 

I will try again on a different subject. (My original was a close-up of Ivy stems and roots on a tree trunk.)

John

[dronecrasher]

2 minutes ago, John Rostron said:

I have now taken a 14-shot burst hand-held. I stacked them at the original size, and at 200% using nearest neighbour. For the 100% stack, I could detect no difference betwee  the original images and either the mean or median of the stack. For the 200% set, the image quality was noticably poorer (from the resizing?) and again there was no improvement. 

I will try again on a different subject. (My original was a close-up of Ivy stemsand roots on a tree trunk.)

John

I think you have to import every single image first (one by one), make some exposure or brightness adjustments in the develop persona , resize the images and export them to tiff/png. then you import them via the stack method and increase the sharpness etc.

[John Rostron]

2 minutes ago, dronecrasher said:

I think you have to import every single image first (one by one), make some exposure or brightness adjustments in the develop persona , resize the images and export them to tiff/png. then you import them via the stack method and increase the sharpness etc.

That is what I did. I did no explicit sharpening at any stage.

John

[dronecrasher]

On 4/5/2018 at 10:52 AM, John Rostron said:

That is what I did. I did no explicit sharpening at any stage.

John

Left picture developed and resized DNG - right super resolution

 

both without any adjustments besides brightness increase (no sharpening, no noise reduction)

[lepr]

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[dronecrasher]

33 minutes ago, owenr said:

 

You'd have made the difference more impressive by setting the zoom to an integer multiple of 100% for each comparison. Other zoom levels produce artefacts.

Can you post new comparisons, please?

 

 

Makes sense

 

Unfortunately I wasn't able to take the drone out for a flight for the past three days so I am using pictures from last week (shot in burst mode 7x)

[John Rostron]

@dronecrasher, as far as I can see, there is little, if anything, to choose between these images. Super Resolution is quite time-consuming (especially when batch-processing is not working properly). Is it really worth the effort? Yesterday I took four burst-mode sets of four different subjects. When I have finished processing them I will report back.

John

[dronecrasher]

10 minutes ago, John Rostron said:

@dronecrasher, as far as I can see, there is little, if anything, to choose between these images. Super Resolution is quite time-consuming (especially when batch-processing is not working properly). Is it really worth the effort? Yesterday I took four burst-mode sets of four different subjects. When I have finished processing them I will report back.

John

I totally agree. It might only make sense if you plan to print certain images

[firstdefence]

I think Super Resolution Image is probably the wrong name, Smoother Resolution Image is probably a better title.

[dronecrasher]

38 minutes ago, firstdefence said:

I think Super Resolution Image is probably the wrong name, Smoother Resolution Image is probably a better title.

As of now I feel like I'm the only uploading content. It would be good if you guys could try it out since I might to something wrong. We are all still experimenting here and I'm sure there is still room for improvement

[R C-R]

7 hours ago, John Rostron said:

@dronecrasher, as far as I can see, there is little, if anything, to choose between these images.

All I can see that is of any significance is less noise in the wall & balcony areas, which is probably more from averaging the frames than from anything else.

[walt.farrell]

1 hour ago, R C-R said:

All I can see that is of any significance is less noise in the wall & balcony areas, which is probably more from averaging the frames than from anything else.

Just looking at them in my browser (Firefox), with this process:
(1) click on an image
(2) click on "Full size" button
(3) click on the resulting image to zoom in.

There's not a lot of difference in the first image.

There is significantly less pixelation in straight lines in the second image's "super resolution" version.

There is some decrease in pixelation in straight lines in the third image, but not as significant as in the second image.

[John Rostron]

6 hours ago, walt.farrell said:

Just looking at them in my browser (Firefox), with this process:
(1) click on an image
(2) click on "Full size" button
(3) click on the resulting image to zoom in.

There's not a lot of difference in the first image.

There is significantly less pixelation in straight lines in the second image's "super resolution" version.

There is some decrease in pixelation in straight lines in the third image, but not as significant as in the second image.

I used steps 1 and 2 as above. I'm not convinced about the validity of step 3, having tried it. I still maintain that there is no real visible improvement.

I should have processed the first of my experimental bursts this morning. I will report back later.

John

[Fixx]

You know, there is an app for superresolution images: https://www.photoacute.com/

Site has some useful reading.