Sharpness pattern - AVS Forum
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post #1 of 22 Old 05-18-2012, 10:15 AM - Thread Starter
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Does any one know a good pattern for sharpness calibration? I found Avs 709 sharpness/overscan to be impractical to use.
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post #2 of 22 Old 05-18-2012, 12:01 PM
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I agree the lined patterns seem to be very ambiguous WRT halos or softness judgment call. Even when looking very closely and carefully to a pattern it is difficult. Also, the acceptable range seems quite large or variable.

To me it seems like a vertical swept sinusiodal signal starting at mid frequencies and going to the very highest resolution limits may be easier to view the effects of the sharpness control. In other words the pattern should be a even tone of gray (black to white). If sharpness control is doing anything negative there should be relative brightness shift in the pattern. So, adjust until pattern has uneven brightness then adjust back down until the pattern is an even gray tone across all frequencies.

This type of pattern is on the THX Optimizer (and others) as part of the Overall Check with color bars. However, it is very small. In addition I don't know what is the frequency upper limit.
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post #3 of 22 Old 05-18-2012, 12:05 PM
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Greetings

Spears and Munsil has a good one ... so does DVE and Disney WOW too.

You would want a pattern that have a medium gray background and black lines on it ... preferably running up down and left/right

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post #4 of 22 Old 05-18-2012, 01:20 PM
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Quote:
Originally Posted by kanti123 View Post

Does any one know a good pattern for sharpness calibration? I found Avs 709 sharpness/overscan to be impractical to use.

What type of display is it?
It has been found that using the brightness pattern of the AVS disk (first one all dark flashing bars) after brightness is set, works well on some display types. Turn off all lights and get close to the set, turn up the sharpness and watch the pattern for white vertical lines where the flashing bars would be below 16 or if you set clips btb right at 16-17. If they show up, turn sharpness down till the go away. It has worked for me on LCD and Plasma. This side effect was reported by anther AVS member in another sharpness thread.
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post #5 of 22 Old 05-18-2012, 01:41 PM
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Thank you very match!
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post #6 of 22 Old 05-18-2012, 02:50 PM
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IMO the best sharpness pattern is the disney wow disc.
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post #7 of 22 Old 05-18-2012, 05:52 PM - Thread Starter
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It's LED LCD display, Samsung UN55D7000 I tried to use the black level pattern to adjust my sharpness. My sharpness is currently at 4 instead of 12. I put on DVE bluray disc to calibrate my sharpness. Still hard to distinguish the different between artificial noise and such. Unless I turn my Sharpness to like 50 which is way to high.
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post #8 of 22 Old 02-16-2014, 11:39 PM
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Which sharpness pattern does Scott Wilkinson and Robert Heron use in the "Home Theater Geeks 175" episode when they calibrate Leo Laporte's OLED. That one seems straightforward. 

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post #9 of 22 Old 02-17-2014, 02:34 AM
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* Scaled Picturea from Actual 1920x1080 pixel sized Patterns.

Hello, this Advanced Sharpness Pattern is available inside the Ted's LightSpace CMS Calibration Blu-Ray Disk among with other 150 Color Reproduction Patterns.

This Advanced Sharpness Pattern is not limited to typical Black/Gray/White Background that all current calibration disks are using but at 4-Step of 7-Color Amplitude Background... wink.gif


Better View - Part of the Advanced Sharpness Pattern

This Sharpness pattern is a real challenge for any display, it's will uncloack problems of yur current sharpness control setting or from other enabled enhancements that were not visible before.

You can use it to verify your current sharpness setting value that you have set using a pattern generator or other calibration disk pattern since all other sharpness patterns available are based at grayscale lines/backgrounds only.

These multicolored backgrounds and shapes/lines conbination maybe some times will make you add 1 or reduce by -1 or more of you sharpness slider setting that you have already set based on other classic grayscale based sharpness patterns.
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post #10 of 22 Old 02-17-2014, 06:27 AM
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I personally like the following:

 

 

Too sharp and the TV will add information/white lines around the black lines. Too little sharpness and the lines will look out of focus.

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post #11 of 22 Old 02-17-2014, 06:42 AM
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Quote:
Originally Posted by ZKACAL View Post

Which sharpness pattern does Scott Wilkinson and Robert Heron use in the "Home Theater Geeks 175" episode when they calibrate Leo Laporte's OLED. That one seems straightforward. 

They are using the Sharpness pattern from the AV Foundry Video Forge Signal Generator.

Hope this helps.
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post #12 of 22 Old 02-17-2014, 06:49 AM
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As long as overscan is off, the sharpness pattern displayed on almost every Samsung panel I can think of should direct you to have the sharpness at 0. If the overscan is on, the sharpness pattern will always look distorted. Check a multiburst or overscan pattern as well
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post #13 of 22 Old 02-17-2014, 06:15 PM
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Quote:
Originally Posted by Bounkass View Post
 

I personally like the following:

 

 

Too sharp and the TV will add information/white lines around the black lines. Too little sharpness and the lines will look out of focus.

Is this from Spears and Munsil?

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post #14 of 22 Old 02-17-2014, 06:18 PM
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Quote:
Originally Posted by Rayjr View Post


They are using the Sharpness pattern from the AV Foundry Video Forge Signal Generator.

Hope this helps.
RayJr

Do pattern generators come with their own patterns already or do you have to upload your own set of patterns? Which company or from what disk was their sharpness pattern brought up from?

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post #15 of 22 Old 02-17-2014, 06:22 PM
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Quote:
Originally Posted by jdoostil View Post

As long as overscan is off, the sharpness pattern displayed on almost every Samsung panel I can think of should direct you to have the sharpness at 0. If the overscan is on, the sharpness pattern will always look distorted. Check a multiburst or overscan pattern as well

In Home Theater Geeks 175, they went with 5 for the Samsung OLED.

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post #16 of 22 Old 02-17-2014, 06:46 PM
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Quote:
Originally Posted by ZKACAL View Post

Do pattern generators come with their own patterns already or do you have to upload your own set of patterns? Which company or from what disk was their sharpness pattern brought up from?

Pattern Generators have there own patterns built into them..but as SpectraCal built the video forge...I think they also offer there patterns on a USB stick..look HERE I think this has the same patterns as the video forge.
Hope this helps

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post #17 of 22 Old 02-18-2014, 01:09 AM
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1024 768 tv here can get pretty blurry on bright screens(high abl).I m using a setting of 50.It adds garbage but it unblurs it.I could go much higher too unblur it.

This is for cable tv watching.
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post #18 of 22 Old 02-18-2014, 06:33 AM
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Quote:
Originally Posted by ZKACAL View Post
 

Is this from Spears and Munsil?

I have no idea I just googled for it a while back.

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post #19 of 22 Old 02-18-2014, 06:53 AM
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Quote:
Originally Posted by Bounkass View Post

Quote:
Originally Posted by ZKACAL View Post

 
Is this from Spears and Munsil?
I have no idea I just googled for it a while back.

It's from Spears & Munsil High-Definition Benchmark Vol. 1
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post #20 of 22 Old 02-18-2014, 02:05 PM
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Quote:
Originally Posted by Bounkass View Post

I personally like the following:

Too sharp and the TV will add information/white lines around the black lines. Too little sharpness and the lines will look out of focus.

This is a good pattern. I could never find the right setting for Sky HD 1080i and it turns out I was one click too high, versus AVS709 and Mascior's disc. Both HD and SD look lovely and smooth now.
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post #21 of 22 Old 02-18-2014, 02:35 PM
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I think I'm going with S & M too.

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post #22 of 22 Old 02-19-2014, 07:06 AM
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Quote:
Originally Posted by xvfx View Post


This is a good pattern. I could never find the right setting for Sky HD 1080i and it turns out I was one click too high, versus AVS709 and Mascior's disc. Both HD and SD look lovely and smooth now.

 

Quote:
Originally Posted by ZKACAL View Post
 

I think I'm going with S & M too.

 

Yeah, I like it too. Plain and simple. No unnecessary features.

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