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chatGPZ
Registered: Dec 2001
Posts: 11108 |
Release id #201894 : Borderpolizei
So, quoting Krill:
Quote:Finally someone made this! =)
It would be really cool if some of you would take their time and read the .pdf, and then provide your results.
Especially interesting would be results from high quality CRT TV sets that can be trusted to be properly factory calibrated. Even more interesting if someone around here is qualified to do this himself (and has the equipment). Speak up! :) |
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MagerValp
Registered: Dec 2001
Posts: 1055 |
Well here's one data point. JVC TM-H1750CG professional video monitor, factory calibrated — I've never touched any of the controls beyond volume and saturation. Notably the image is convex and not concave.
https://share.icloud.com/photos/0mGcbp3Se7y_8JvmOfpW-FxBg |
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chatGPZ
Registered: Dec 2001
Posts: 11108 |
This one is really interesting... almost perfectly square picture with black "border" around it, yet it doesnt show the entire range. Funky. (Or does it only look like there is a black border in the picture, and its really the monitor bevel?)
PS: it would still be good if you could verify the geometry using that "Testbild" program... ie check if the circle isnt totally distorted |
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MagerValp
Registered: Dec 2001
Posts: 1055 |
The aspect ratio is slightly narrow:
https://share.icloud.com/photos/0WVuae4Da_q5_bmg-CfAYphwg
It's hard to tell what the border is made of as it's inside the glass. Some kind of plastic film? It has a slight stair stepping to it.
https://share.icloud.com/photos/0kaaDH-gRjHZXhkLWnYj3dXjg |
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chatGPZ
Registered: Dec 2001
Posts: 11108 |
Oh well, thanks :) I wonder if correctly calibrated CRTs even exist at this time :=) |
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Mr. SID
Registered: Jan 2003
Posts: 421 |
This is really hard to do. I have a Sony PVM 14L4, which was last calibrated professionally in 2014. There is no user-accessible way to adjust the geometry (and I'm not going to open it, it's sealed). The C64 image is not perfectly centered. I assume that to be the correct way.
The visible part of the Trinitron tube is essentially rectangular, so the difference between the two lines is minimal:
http://galway.c64.org/~sid/borderpolizei.jpeg |
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chatGPZ
Registered: Dec 2001
Posts: 11108 |
the vertical "non centering" actually looks spot on - it should be 8 pixels more on the left than on the right. Thanks! |
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Krill
Registered: Apr 2002
Posts: 2839 |
Quoting Groepazthe vertical "non centering" actually looks spot on - it should be 8 pixels more on the left than on the right. Hmm, but only if pretty much "everything" is shown horizontally. As in, when the right border isn't cropped like in the screenshot, i guess. =)
Can't properly read the right-border numbers there, will the next version come without compliance to borderline compo restrictions? |
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Copyfault
Registered: Dec 2001
Posts: 466 |
Quoting KrillQuoting Groepazthe vertical "non centering" actually looks spot on - it should be 8 pixels more on the left than on the right. Hmm, but only if pretty much "everything" is shown horizontally. As in, when the right border isn't cropped like in the screenshot, i guess. =)
Can't properly read the right-border numbers there, will the next version come without compliance to borderline compo restrictions? Alternatively we could choose an alternative font, but the point *is* taken;)
Frankly spoken, this is the first time I ever saw a c64 output with such a narrow right sideborder!
Thanks to everyone for doing measurements! Means a lot to us :) |
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chatGPZ
Registered: Dec 2001
Posts: 11108 |
Quote:Hmm, but only if pretty much "everything" is shown horizontally. As in, when the right border isn't cropped like in the screenshot, i guess. =)
nope. its exactly what happens when you use a C64 at a properly calibrated TV set - 8 pixels more in left border than in right border. |
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Krill
Registered: Apr 2002
Posts: 2839 |
Quoting Groepaznope. its exactly what happens when you use a C64 at a properly calibrated TV set - 8 pixels more in left border than in right border. Properly calibrated for TV, improperly calibrated for C-64, then. =) |
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chatGPZ
Registered: Dec 2001
Posts: 11108 |
ab ins Eck! |
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Frantic
Registered: Mar 2003
Posts: 1627 |
Some old Amiga monitor.
Type 1081
Made in Taiwan
Nr. 15723052981
This type:
https://bigbookofamigahardware.com/bboah/product.aspx?id=847
Upper left:
013 019
29 23
Upper right:
178
33
17B
36
Lower left:
1EB
37
1F0
32
Lower right:
133 129
44 50
Hope I did this correctly. |
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Thunder.Bird
Registered: Nov 2003
Posts: 109 |
I also wondered if I should post my screens absolute maximums. I decided to write them down locally.
So I'm able in time to post them if necessary or take that as a personal reference.
So I could (if really necessary!) adjust my screens at the particular time, you coders are doing crazy things again.
But for motivational issues I'll post them nevertheless, now and here! NARF
(type, manufacturer, name - outer/inner max top/bottom/left/right dec) ...this should go into standarized database
CRT | Sony | Trinitron BVM (15“) | 27/21|49/43|31/29|29/25
Beamer | Sanyo | Z2 | 28/27|47/46|36/35|35/34
now go, do crazy stuff :P |
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chatGPZ
Registered: Dec 2001
Posts: 11108 |
please post the other values (positions) as well :)
not sure what you mean by "my screens absolute maximums". all values should be checked after calibrating the screen as described in the manual. tweaking the screen so it shows as much of the signal as possible makes no sense for this measurement - we already know what those are, and the whole point is to find out what the visible area of properly calibrated screens is. |
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Digger
Registered: Mar 2005
Posts: 421 |
Perhaps a video showing how to calibrate would be cool for non-RTFM freaks. I'd gladly make one but don't have any CRT yet. |
