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Discussion Starter #1
This thread is a companion thread of the 2 great Xylon's threads:

Blu-ray, HD-DVD & SD DVD Comparison Screenshots

Blu-ray, HD-DVD & HD Broadcasts (H.264 & MPEG-2) Screenshots


We use some of the great Gooki's hdmovies database screenshots too:
http://www.hdmovies.co.nz/screenshots.html


In this thread we try to rank the original master picture definition of the HD DVD and Blu-Ray video transfers.


To do this we use a simple test, called the Downscaling-Upscaling Test, DU Test for short.


Not all HD DVD and Blu-Ray movies are transferred from a true 1080p master. Many titles are made using old masters at less resolution, sometimes even DVD resolution, upscaled or bobbed to 1080p with some algorithm, or truly 1080p but from an originally soft master.

The resolution of the final video has noting to do with the amount of details in it. You can take a 32x32 clip and upscale it to 1920x1080, and still say on the cover that it's fullHD, and nobody can dispute it.

But the master can have lower details for a variety of reasons. For example:


- low resolution film to digital scan (ie. Traffic)

- 1080p master but bad digital scan (ie. Fifth Element)

- soft look due to artistic choice (ie. Sky Captain)

- aged film stock (ie. old movies)

- small film negative gauge (gauges range from 8 mm to 70 mm, the resolution is proportional)

- high ISO film stock (a bigger ISO equals a bigger size of the silver crystals in the emulsion. The smaller the crystals, the finer the detail in the photo and the slower the film).

- digital filters that reduce details applied in post processing

- optical lens filters that reduce details

- lots of zoomed or out of focus scenes

- noise reduction filters applied on the master (used to eliminate the grain, they also soften the image)

- cropping and resizing done in post-processing to change the framing, zooming or to fit the aspect ratio

- etc.


Whatever the reason, the DU Test can determine the amount of definition in the master simply revealing the lowest resolution needed to preserve all details.


A DU image is an image that simulates an upscaled lower resolution master or a master with lower definition.


A DU Image can simulate any X resolution, with X less than 1080p (1920x1080), just downscaling the original to X and upscaling it back to 1080p.


If when downscaling the original 1080p image to an X resolution and upscaling it back to 1080p it doesn't loose any details compared to the original, then the X resolution is likely to be near the original master definition. You can do it yourself with Photoshop using the screenshots posted by Xylon. Just remember to use the best upscaling/downscaling algorithm available in Photoshop.


DU Test theory is based on the assumption that the more difference and detail loss between the DU image and the original 1080p, the more the master must be better than the tested resolution (for example 720p or 480p).


For pratical reasons, we'll test two different resolutions with the DU Test:


720p (1280x720)

480p (853x480)


This way we can divide all the movies in 3 tiers:


1080p

.

.
 

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Discussion Starter #2

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Discussion Starter #3
Casino Royale (Blu-Ray)


DU Test for 720p:






The difference is very noticeable. Full HD Quality ***.

UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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Discussion Starter #4
Fifth Element Remastered (Blu-Ray)


DU Tests for 720p:








No noticeable difference. Let's try the 480p DU test:









Definitely above 480p. Verdict: HD Ready Quality **.


UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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Discussion Starter #5
Harry Potter and The Goblet of Fire (HD DVD)


DU Tests for 720p:






Noticeable differences. Verdict: Full HD Quality **.

UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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Discussion Starter #6
X-Men The Last Stand (Blu-Ray)


DU Test for 720p:






Difference noticeable, especially on the dress lines. Full HD Quality **.


UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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Discussion Starter #7
Underworld Evolution (Blu-Ray)


DU Tests for 720p:







No noticeable differences, just some artifacts. Let's try the 480p DU Test:






Definitely above 480p. HD Ready quality.

UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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Discussion Starter #8
Underworld Evolution (HD DVD)


DU Test for 720p:




No noticeable difference. We proceed with the 480p test:




Noticeable difference. Verdict: HD Ready Quality.

UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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Discussion Starter #9
Terminator 2 (Blu-Ray)


DU Test for 720p:




Difference barely noticeable. Let's test the 480p:




Noticeable difference. Verdict: HD Ready Quality **.


UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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Discussion Starter #10
Terminator 2 Director's Cut (HD DVD)


DU Test for 720p:




No noticeable differences just as in the Blu-Ray version. Let's try the 480p test:




Noticeable differences. Verdict: HD Ready Quality **.


UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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Discussion Starter #11
Troy (HD DVD)


DU Test for 720p:






No noticeable difference. I proceed with the 480p test:






The difference is noticeable. So the master must be between 480p and 720p. Verdict: HD Ready Quality **.


UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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Discussion Starter #12
Fantastic Four (Blu-Ray)


DU Test for 720p:






No noticeable difference. We proceed with the 480p DU test:






Noticeable differences. Verdict: HD Ready Quality **.


UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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Discussion Starter #13
Batman Begins (HD DVD)


DU Tests for 720p:








No noticeable difference, maybe the master is just a little more soft. I proceed with the 480p tests:








The difference is noticeable. So the master must be above 480p and below 720p. Verdict: HD Ready Quality **.


UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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Discussion Starter #14
Stargate (Blu-Ray)


DU Test for 720p:






No noticeable difference. I proceed with the 480p test:






The difference is very noticeable, especially in the upper part of the mask. So the master must be above 480p and below 720p. Verdict: HD Ready Quality **.


UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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Discussion Starter #15
Serenity (HD DVD)



DU Test for 720p:








The difference is very noticeable on all comparisons. Verdict: Full HD Quality ***.


UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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This is a really interesting comparison


thanks for the work


While your at it how about you do this every week for all the new releases
 

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Discussion Starter #17

Quote:
Originally Posted by Jiffylush /forum/post/0


This is a really interesting comparison


thanks for the work


While your at it how about you do this every week for all the new releases

I still have to cope with all Xylon's screenshots, and it will take a while. But as soon as I finish with the old ones, I'll begin adding the new ones.



Of course, any help is appreciated. As I said, creating the DU Image is very simple.
 

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Discussion Starter #18
Chronicles of Riddick (HD DVD)


DU Test for 720p:






Some noticeable differences. Verdict: Full HD Quality *.


UPDATE: The Upscaling-Downscaling test images have been updated with the new method estabilished in post #179.
 

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Greetings


I see more texture on the rocks in 1080p than the converted one. Also more crisp in the armor the guy is wearing.


regards
 

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Well Batman Begins is S-O-F-T.
 
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