Talk:Aspect ratio (image)

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16:9 and the APS film camera[edit]

The 16:9 aspect ratio is stated to have its "roots in the APS film camera" but the camera is said to have been "first produced in 1996." http://en.wikipedia.org/wiki/Advanced_Photo_System

I've found conflicting information, stating that the original 16:9 concept was developed earlier, by Kerns Powers in a SMPTE Working group. As stated via the footnotes of the following page, "In 1984, this concept was unanimously accepted by the SMPTE working group." (from a PDF referenced in the footnote). http://en.wikipedia.org/wiki/16:9#History

Peter Fagan (talk) 16:33, 31 December 2012 (UTC)

Not to mention the fact that 30.2 x 16.7mm is NOT a 16:9 aspect ratio. Did people's calculators run out of batteries? 30.2/16.7 = 1.8084. That's more of a 9:5 aspect ratio (9/5 = 1.8) than a 16:9 aspect ratio (16/9 = 1.777...). Gistya (talk) 06:39, 14 October 2013 (UTC)

Split 16:9 into its own article[edit]

About half this article is now about 16:9 and its history and adoption. This should be split off into its own article. —Pengo 21:58, 23 November 2010 (UTC)

As there were no comments or objections, I've created a 16:9 article now. —Pengo 21:49, 21 December 2010 (UTC)

Reqdiagram[edit]

As there seems to be plenty of diagrams and pictures, I propose to delete the reqdiagram tag. Egmason (talk) 10:50, 25 January 2011 (UTC)

Common aspect ratios box[edit]

The box at the top-right of the article was replaced with a div tag solution and as a result looks a lot worse now. The images that were being used before were a much better choice [1]. Can new images be made? If not can these boxes (with unnecessary clutter about the golden ratio etc) be removed? 202.46.138.86 (talk) 07:38, 10 February 2012 (UTC)

The Golden Ratio box does not fit in with these others; agreed. Also needed are 2.35:1 and 2.21:1, common aspect ratios for films. — Preceding unsigned comment added by 74.81.189.241 (talk) 19:46, 1 August 2012 (UTC)

The box "some common aspect ratios" does not display well. Most of the text spills over into the next box making it extremely difficult to read. I think this might be due to different browser rendering (such as choice of default font). I agree that having a fixed image with this information would be better as it would be independent of viewer settings.

A minor nitpick: most of these aspect ratios are not "common". Maybe it can or should be called something else? VanBoek (talk) 20:59, 6 January 2017 (UTC)

Storage vs Display aspect[edit]

I'm trying to check whether the picture is ever distorted slightly in DVDs by squeezing the image.
The article says "Some films which were made in a 1.85:1 aspect ratio, such as the U.S.-Italian co-production Man of La Mancha, fit quite comfortably onto a 1.77:1 HDTV screen and have been issued anamorphically enhanced on DVD without the black bars." What the hell does that mean? It says that 1.85 was squeezed into 1.77 and that this looks perfectly comfortable to the producers.
Understanding SAR and having it decoded properly when ripping a DVD seems to be problematic. George Slivinsky (talk) 06:41, 13 May 2012 (UTC)

Monitor AR[edit]

I've been suspicious for a long time. Now I used a ruler to measure what was a square box, and my monitor is displaying it with a height 10 and width 9. What in the world is that about? We need more challenges with AR? (RCA HD) George Slivinsky (talk) 13:21, 19 May 2012 (UTC)

Re: Distinctions[edit]

[1] For example, a 640 × 480 VGA image has a SAR of 640/480 = 4:3

Using any Calculator 640/480 = 1.3333333333333333333333333333333 (1.3333333333333333333333333333333 to 1 <> 4:3 Aspect Ratio) Also I agree it would be 1:1 square pixels


[2] if displayed on a 4:3 display (DAR = 4:3), has square pixels

Then would it not be the opposite for when displayed on a 16:9 display would it then be then 2:1 non square pixels as shown here http://en.wikipedia.org/wiki/Pixel_aspect_ratio

Since we all (high percent and growing) view video (film or other) now on 16:9 tv, displays, monitors and others. Then should also be included for this fact.

Clarity also then would be needed for bt.601, bt.709.

When viewing bt.601 on 16:9 would it always be 1:1 square pixels (I'm sure would be framed within black bars at side or around the video. The player even when zoom to remove black bars still will be 1:1 square pixels.


Other details that would be useful to include

704/396 = 1.7777777777777777777777777777778 (1.7777777777777777777777777777778 to 1 <> 16:9 Aspect Ratio) Then displayed on a 16:9 display would this be 1:1 square pixels or 2:1 non square pixels DVD D2 704/396 chosen here as it is the highest 16:9 Aspect Ratio allowed for dvd.

where for example 2:1 no square pixels would also be 1920/1080 = 1.7777777777777777777777777777778 (1.7777777777777777777777777777778 to 1 <> 16:9 Aspect Ratio) This is a 2:1 non pixels

The first is bt.601 and the second is bt.709 though wouldn't they also both be 2:1 non square pixels when never have been analogue always digital. Recorded onto hard drive or other digital media, edited and dvd made from it. When also played from dvd player via HDMI onto the digital LCD (or other) flat display.

While also would be good to mention whether the macro-blocks that make a pixel are also 1:1 or 2:1 in when analogue only, anologue that has been digitised and digital only. Or linked to a wiki page (onto the subject) where it is described in more detail

There needs to be a distinction for analogue and digital, Where would be analogue bt.601 when all digital becomes something else that isn't bt.601 analogue

All this I write is for true 16:9 where also need to to have true pixels relation for accurate pixel videos.

Not technically trained in this field or know to much of it. Reading from bystander and giving feedback that I hope you may find helpful to making this Aspect Ratio page better for us all to understand. — Preceding unsigned comment added by 87.242.162.231 (talk) 17:37, 4 April 2013 (UTC)

8:5 != 16:10 WTF[edit]

The pictures on the right imply that 8:5 is somehow different from 16:10...

(Or even worse - in some ways - that 16:10 is a decent simplification for 1.618:1, the golden ratio, which might be fine in some contexts, but not when discussing aspect ratios... as 16:10 is very commonly used for proper 1.6:1, which is the same as 8:5, which is introduced one box above...)

Who made those graphics? 88.217.107.26 (talk) 13:16, 22 April 2013 (UTC)

2 perf pull down[edit]

I think that the 2 perf pull down for making wide screen should be mentioned here.Longinus876 (talk) 04:54, 25 September 2013 (UTC)

1.77???[edit]

Since the ratio is 1.77777777777....., it is not "sometimes" rounded up to 1.78; it is always rounded up rather than down (at least, in my U. S. experience). Jim Stinson (talk) 19:40, 7 April 2014 (UTC)

Do Not Merge Image Aspect Ratio with Display Aspect Ratio Articles - They Are Different[edit]

An image and a display are not the same thing. This is blatantly obvious.

A square pixel image with a 4:3 image aspect ratio will display just as correctly in a square pixel video mode with a 16:9 display aspect ratio as in a square pixel video mode with a 4:3 display aspect ratio.

This suggestion is very confused or has too much time on its hands.

The Wikipedia articles on image processing and displays are excellent, widely referenced, and provide conscise information that is historically valuable and scientifically correct. Leave them alone or expand them into new articles, but do not consolidate independent problem domains, or articles become damaged.

Suggesting that something is too technical or too confusing generally is a confused non-technical suggestion to those of us who depend on Wikipedia to refresh our memories, and we recoil in horror when damage is suggested.

Thanks.

Bill Buckels (talk) 09:22, 27 September 2015 (UTC)

Hi, Bill
Your argument, "an image and a display are not the same thing" belongs to a discussion purporting to merge Image and Display. But in this case, both Aspect ratio (image) and Display aspect ratio are talking about the exact same thing.
And as far as I can see, this article (Aspect ratio (image)) needs a lot more footnotes and its external links borderline on spam. Seriously, did you read the article?
Best regards,
Codename Lisa (talk) 12:12, 27 September 2015 (UTC)
Seriously, do you understand the article? Let's try again to understand...
Please see: Aspect ratio (image)#Distinctions
Please also see: Pixel aspect ratio
Image Aspect Ratio is also known as storage aspect ratio (SAR).
Display Aspect Ratio (DAR) and Storage Aspect Ratio (SAR) are not the same.
For example, when an image is prepared for a Rectangular Pixel Display Mode like IBM-PC 320 x 200 MCGA which has a Pixel Aspect Ratio (PAR)of 8:5 and a DAR of 4:3 then is displayed on a Square Pixel Display Mode like IBM-PC 320 x 240 ModeX which has a PAR of 1:1 and a DAR of 4:3, the SAR will be different than the DAR.
They are not the exact same thing.
Your other comments are your opinions, and may be correct... but what is SPAM to you may be all the author had time to do. But you are not correct to say that Image Aspect ratio and Display Aspect Ratio are the same.
Seriously.
By the way, my use of the word "mode" is in the context of "graphics mode" and means that an aggregate of one or more hardware settings has been used to set the resolution and other display attributes (properties). This is old terminology.
Also, the idea of a device dependent bit-mapped graphics image is from a time when graphics images were often just a copy of screen memory. See my article on BSAVEd images for more info about what we used to do: BSAVE (bitmap format)
Until I did this article, this information was really never documented in one place. Now this article has gone viral.
For info on ModeX see: Mode X
I have code that I wrote in the 80's for ModeX that would be good examples to improve that article. And I have other production code that would improve many Wikipedia articles on computer graphics having spent over 30 years developing computer graphics software. But no time and little patience for doing so, and less patience for trying to make my content match encylopedic standards. I also believe that capturing this information before it disappears is important. Several of my articles here have been edited mercilessly, and important content removed. Wikipedia is probably not the place for archiving this type of material given my past (and present) experience.
Wikipedia is generally still the best, regardless. But it is no substitute for experience and understanding before developing an opinion.
Seriously.
All the best,
Bill Buckels (talk) 12:49, 22 November 2015 (UTC)
Hello, Bill Buckels
First, I urge you to stop putting word in mouth; you are doing copiously. For example: But you are not correct to say that Image Aspect ratio and Display Aspect Ratio are the same. I never said such a thing. What I said is: Both Aspect ratio (image) and Display aspect ratio are talking about the exact same thing. And they are. They are both talking about both DAR and SAR.
Now, I do not have enough technical confidence to talk about pixel aspect ratio. So, I'd like to invite the top two contributors to that article. FleetCommand and Cybercobra, would you mind telling what do you think of what Bill said about pixel aspect ratio?
Best regards,
Codename Lisa (talk) 19:35, 22 November 2015 (UTC)
Purely technical and completely off-topic. I didn't read other stuff thoroughly but from what I read, they don't seem to be any better either.
I myself am not interested in this merger discussion. But just for the records, sufficient similarity of the subjects and prose sizes are grounds for merger. Make of that what you will. Fleet Command (talk) 02:54, 23 November 2015 (UTC)

Since the merger discussion petered out 14 months ago, without any clear consensus, I suggest we might want to remove the merger tag from this article. Regards --Jeremy Butler 13:31, 15 March 2017 (UTC)

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Why sould we merge them?[edit]

I dont see the point in merging two different things in one, last day I tried merging my apple with my banana ant it didnt work, why should we try mergin display aspect ratio and image aspect ratio? — Preceding unsigned comment added by 199.180.52.129 (talk) 17:19, 10 May 2017 (UTC)

External links modified[edit]

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Portal:Wide image listed at Redirects for discussion[edit]

Information.svg

An editor has asked for a discussion to address the redirect Portal:Wide image. Please participate in the redirect discussion if you wish to do so. UnitedStatesian (talk) 21:30, 12 April 2019 (UTC)

Common image aspect ratios table[edit]

At the top of the article there is a table of "Common image aspect ratios". However, "4:1" specifies that it is, "Used only in Napoléon (1927)". "1.6180:1" (golden ratio) and "2.414:1" (silver ratio) are included, but without examples. Perhaps some of the ratios should be removed or the table heading should be rewritten. Hyacinth (talk) 02:07, 29 September 2019 (UTC)

Etymology of "aspect ratio"?[edit]

What's the etymology of this term? I get that it's a ratio of width to height, but what does the word "aspect" have to do with it? Aaronfranke (talk) 20:18, 2 October 2019 (UTC)