CurtPalme.com Home Theater Forum

David_Web · Joined: 02 May 2007 Posts: 418 Location: Sweden

I have made a few Setup patterns that might be useful.
I have yet to test them on a CRT but in theory they should work.

As of now there is only convergence patterns.
Please test how well they work compared to the usual 'on top' type patterns.

They are all 1920*1080 and are labeled with the color they are.
They are all full brightness so be careful to avoid burn in.

Any suggestions are welcome.

Added a Phosphor grain pattern to simplify mechanical focus. It has an inverted # to make it easier to find the correct range to start with. (RGB)
I also added a bandwidth pattern with full and half res. (RGBW)

I updated Package 2 with the correct patterns, sorry for the mixup.

Added ringing and low level bandwidth tests.

Added brightness and contrast patterns.
Also a numbered step pattern to see if anything is getting crushed.

**kal** · Posted: Tue Apr 22, 2008 2:10 pm Post subject:

Nice stuff!

Why the patterns where the dots or lines are offset? Ie: There are some that are little squares of one colour with a single pixel dot inside but slightly offset.

Kal

David_Web · Joined: 02 May 2007 Posts: 418 Location: Sweden

It might make for more accurate converging if you aim to get a dot centered inside a box instead if something centered ontop of another thing and then trying to detect a slight tint telling if it is centered or not.
It's a test though and I don't know if it has any advantage at all.

Gino · Posted: Wed Apr 23, 2008 2:06 am Post subject:

Nice work David, I really like the convergence patterns! Makes a lot of sense to me... I'll be using these for sure.

David_Web · Joined: 02 May 2007 Posts: 418 Location: Sweden

Thanks. Added a few more patterns.
Any other pattern you would like to see?

1031 · Joined: 22 Mar 2006 Posts: 657 Location: Finland

Here is also one, i dont know heck about how to make diy patterns so i asked at one friend to make this one for magnetic/astig. setup. Thanks to him. (TNR)
That circle in center helps little with 2/4 pole setup.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

dave how about the one on one off pixel line patterns that Mike parker always uses to show resolution capabilities.

Athanasios

David_Web · Joined: 02 May 2007 Posts: 418 Location: Sweden

Updated the second package with correct patterns.

Do you mean like the test pattern app found in the HTPC forum?
The patterns (or at least similar) to what MP has used is included in the second pack and are now fixed to look look like they should.

**kal** · Posted: Wed Apr 23, 2008 4:48 pm Post subject:

If someone has time they should look into putting these into an ISO in Blu-ray and HD DVD format that people can burn onto a standard DVD and play back. This is what http://avshd709.com/ does for their free test disc and it works well. 99% of us don't use HTPC's anymore. Smile

Kal

Fujifrontier · Joined: 20 Oct 2007 Posts: 354 Location: San Antonio, Texas

i'm going to try it on my 1020 for grins n giggles Wink

David_Web · Joined: 02 May 2007 Posts: 418 Location: Sweden

I wonder if bluray and hddvd supports png or other lossless format as a background picture so you don't have to make a clip of every pattern. Should save a lot of space. DVD RW should make for easy updates.
Are their any free tools to make a disk like that? I don't have a player to test it though.

I might do some black crush test patterns.
Falloff and ringing might be possible as well. Not sure how to get correct values though.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Zebu Fellenz · Joined: 21 Dec 2006 Posts: 2567

Gino · Posted: Thu Apr 24, 2008 4:18 am Post subject:

David_Web · Joined: 02 May 2007 Posts: 418 Location: Sweden

I thought it would be easier to get coarse focus when you have something to aim for, like getting the lines as small as possible. I haven't tested but I can imagine that the grain can be a little hard to see and especially hard to see if you turn the wrong way. Might also be easier to get corner focus somewhat right.
As I said it's just theory and I don't have the CRT setup yet so I can test it, have to bleed the tubes first.

Any other patterns you could think of that might be useful?

Fujifrontier · Joined: 20 Oct 2007 Posts: 354 Location: San Antonio, Texas

David_Web · Joined: 02 May 2007 Posts: 418 Location: Sweden

Added ringing patterns to see if anything is oscillating. 1, 2, 3 and for pixel wide on/off with 50% gray to see the ringing.

Also added low level bandwidth test to see if the projector is able to resolve small differences.
1:1 with varying level of amplitude in 4 levels around midpoint.

Any more versions you would like to see?

David_Web · Joined: 02 May 2007 Posts: 418 Location: Sweden

Added brightness and contrast patterns.
Also a numbered step pattern to see if anything is getting crushed.
Ether black level or higher levels.