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Brad Fitzpatrick

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HDTV focus test image [Dec. 13th, 2005|08:33 pm]
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David and I created an image to test that the HDTV modeline and projector were cooperating and the projector indeed wasn't doing any scaling internally.

This is also useful for testing the focus of your projector:

http://www.picpix.com/brad/pic/0092dyt9

Enjoy.
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Comments:
[User Picture]From: supersat
2005-12-14 04:40 am (UTC)

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Looks like an old Mac boot screen. ;)
[User Picture]From: duskwuff
2005-12-14 05:11 am (UTC)

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[User Picture]From: vanbeast
2005-12-14 04:43 am (UTC)

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These images (with the alternating black and white pixels) are also really good for auto-tuning LCD panels that are connected via analog means.

Stick one of those in your root window, get the mouse pointer off the screen, and hit the auto-adjust. It's surprising what a difference it makes.
[User Picture]From: brad
2005-12-14 04:49 am (UTC)

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For realz. (speaking from experience, since I've to this day never used DVI.....)

Also a black-on-white xterm with small font full of text, as produced with say: perl -e 'print "A"x800000' or similar.
[User Picture]From: vanbeast
2005-12-14 04:50 am (UTC)

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Oooo thanks, good tip. I've been too lazy to create one of those images for the native resolution of my dell 24", the xterm should do nicely.
[User Picture]From: vanbeast
2005-12-14 04:51 am (UTC)

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Oh, and DVI is totally worth it. Feels like you can cut your finger on the text. Gorgeous. Reduced my eye strain significantly.
[User Picture]From: taral
2005-12-14 06:20 am (UTC)

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I will certainly attest to this. Getting sharp text on VGA requires good filters in your video card -- the higher the rez, the better the required filters. DVI doesn't have any such requirement, so even a cheaper card can do nice DVI at high-rez.
[User Picture]From: nothings
2005-12-14 08:27 am (UTC)

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Oh, I didn't know about that auto adjust trick. Nice.

I have two 20" LCDs side by side driven by a single graphics card, so one is DVI and the other is VGA, and the quality difference has been hugely noticeable. Particularly, bitmapped-esque fonts without anti-aliasing are really intrusive since I can see every pixel perfectly on the DVI machine. Suddenly the VGA is nearly as sharp. Woohoo!
[User Picture]From: gaal
2005-12-14 05:42 am (UTC)

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ROTFL. Non-security focus.
[User Picture]From: matte
2005-12-14 05:10 am (UTC)

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WOW! I had no idea just how 'out of tune' my LCD panel was.

Thanks for the tip!
[User Picture]From: boggyb
2005-12-14 12:35 pm (UTC)

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Ooooooohhh... pretty moire effects! (17" CRT here, driven at 1280x960) *tinkers with moire controls* Argh, now it shimmers!

Must try this one out on the Triniton when I get back, and see how that handles it.
[User Picture]From: mendel
2005-12-14 03:06 pm (UTC)

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When the lines on the screen
Make more lines in between,
That's a moiré!
[User Picture]From: herbie
2005-12-14 03:59 pm (UTC)

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+1 Funny
[User Picture]From: ydna
2005-12-14 04:53 pm (UTC)

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Bwah ha ha!