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SYC
Joined: 16 May 2006
Posts: 269
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| Posted: Sat Apr 25, 2009 6:35 pm Post subject: How to know it is 1:1 mapping? |
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I had a Lumagen scaler, which can set the resolution freely. As I know , there are several anamorphic ratios for movies, like 2.35, 2.39, and 2.4. How do I know which resolution is 1:1 mapping for one of them?
SYC
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CIR Engineering
Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany
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| Posted: Sun Apr 26, 2009 1:00 am Post subject: |
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Well, if you set the input and output aspect rations to the same 2.35-2.35 and have the pixels count map you will be at 1:1. For example, on the Lumagen for 2.35 set your output and input aspects to both 2.35. Then for 1080p sources, set the output active pixels to 1920x818.
Verify with the internal test patterns when you are done, or better yet use a generator.
craigr
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Sun Apr 26, 2009 5:38 am Post subject: |
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The correct res is 2:40, which work out at 1920 x 804.
2:35 hasn't been used since the 1950's.
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Tom.W
Joined: 09 Mar 2006
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CIR Engineering
Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany
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| Posted: Sun Apr 26, 2009 2:00 pm Post subject: |
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| Mark_A_W wrote: | The correct res is 2:40, which work out at 1920 x 804.
2:35 hasn't been used since the 1950's. |
If you are using a Lumagen the best way to set it up is 2.35 because you have an input aspect that can easily be matched with the press of one button.
2.35 is a good choice anyway because that way any ratio 2.35 and higher (2.4 or 2.5) can also be used inside of the 2.35 aspect without loosing image. Unless you want to configure a projector memory for every aspect higher than 2.35, you should just use 2.35.
craigr
_________________
JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
Light Illusion ColourSpace XPT Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
OMARDRIS JVC Software Patch to use K10-A and Jeti with JVC OEM AutoCal Software!
Sencore CR7000 CRT Tube Analyzer / Rejuvenater
Authorized Dealer for Lumagen & just about everything worth buying
www.CIR-Engineering.com - craigr@cir-engineering.com
Phone: 865-405-6892
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CIR Engineering
Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany
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| Posted: Sun Apr 26, 2009 2:02 pm Post subject: Re: How to know it is 1:1 mapping? |
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| SYC wrote: | I had a Lumagen scaler, which can set the resolution freely. As I know , there are several anamorphic ratios for movies, like 2.35, 2.39, and 2.4. How do I know which resolution is 1:1 mapping for one of them?
SYC |
You can grab this SS off my web page to help calculate your pixels http://www.cir-engineering.com/bin/ars.xls.
craigr
_________________
JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
Light Illusion ColourSpace XPT Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
OMARDRIS JVC Software Patch to use K10-A and Jeti with JVC OEM AutoCal Software!
Sencore CR7000 CRT Tube Analyzer / Rejuvenater
Authorized Dealer for Lumagen & just about everything worth buying
www.CIR-Engineering.com - craigr@cir-engineering.com
Phone: 865-405-6892
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csamos
Joined: 10 Jul 2008
Posts: 59
Location: Austin, TX
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| Posted: Sun Apr 26, 2009 5:09 pm Post subject: |
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| Mark_A_W wrote: | The correct res is 2:40, which work out at 1920 x 804.
2:35 hasn't been used since the 1950's. |
Then why do newer movies like I Robot, The Transporter movies and others come in 2.35:1? I also noticed that many animated movies are 2.39:1.
I just created some masking panels for my 16:9 screen to accommodate any of those. There is no overscan for 2:40:1 movies, but 2.35:1 movies overscan by 1/2".
-Carl
http://www.samos.org/Theater/
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kschmit2
Joined: 09 Mar 2006
Posts: 1141
Location: Heidelberg, Germany
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| Posted: Sun Apr 26, 2009 5:20 pm Post subject: |
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| csamos wrote: | | Mark_A_W wrote: | The correct res is 2:40, which work out at 1920 x 804.
2:35 hasn't been used since the 1950's. |
Then why do newer movies like I Robot, The Transporter movies and others come in 2.35:1? I also noticed that many animated movies are 2.39:1.
I just created some masking panels for my 16:9 screen to accommodate any of those. There is no overscan for 2:40:1 movies, but 2.35:1 movies overscan by 1/2".
-Carl
http://www.samos.org/Theater/ |
They should all be 2.39:1, no matter what the BD or DVD case says.
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Mon Apr 27, 2009 3:24 am Post subject: |
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Yes, sorry, 2.39:1.
But 2.39:1 doesn't work out to a round pixel number, from memory, you'll end up with 2.40:1 I think.
2.35:1 is a turn of phrase only these days (to be correct it disappeared in the 70's, not the 50's...my memory is going...)
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SYC
Joined: 16 May 2006
Posts: 269
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| Posted: Thu Apr 30, 2009 8:42 pm Post subject: |
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So there is no test pattern or something else to test if the setting is correct, and we can only calculate the resolution with 2.35 or 2.39 ratios? 2.35 and 2.39 is my real question because they tell different numbers to judge correct resolution.
SYC
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Fri May 01, 2009 8:39 am Post subject: |
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On a PC the Haali Renderer will tell you when it's scaling. You turn on the OSD and find the res that doesn't scale the 1920.
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CIR Engineering
Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany
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| Posted: Fri May 01, 2009 8:48 pm Post subject: |
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| SYC wrote: | So there is no test pattern or something else to test if the setting is correct, and we can only calculate the resolution with 2.35 or 2.39 ratios? 2.35 and 2.39 is my real question because they tell different numbers to judge correct resolution.
SYC |
Look at patterns with every H line and then every V line. If your projector can't resolve this, look at every other line patterns. The patter should be smooth and look uniform across the screen. If you see banding it's not 1:1.
craigr
_________________
JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
Light Illusion ColourSpace XPT Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
OMARDRIS JVC Software Patch to use K10-A and Jeti with JVC OEM AutoCal Software!
Sencore CR7000 CRT Tube Analyzer / Rejuvenater
Authorized Dealer for Lumagen & just about everything worth buying
www.CIR-Engineering.com - craigr@cir-engineering.com
Phone: 865-405-6892
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