LCD Banding

[DasFox]

Someone is having some banding problems with his LCD, does anyone know a good link I can show him to help explain what banding is for him to read.

THANKS

 

[xtknight]

A band is one part of the color gradient (continuum) that is more than one pixel wide and of the same color. This means that if an application requests RGB(200,200,200), it could be getting the same thing from RGB(201,201,201). If these bands are quite wide (15 pixels or more), they could have a realistically noticeable effect on image reproduction if you have acute vision and view the area of banding up close.

Here I have a couple programs to test it (The GRADient LINearity test):

For Red, Green, Blue, Gray colors: http://xtknight.atothosting.com/tools/gradlin-v0.2.exe
For Red, Green, Blue, Gray colors (fullscreen; press ESC to exit): http://xtknight.atothosting.com/tools/gradlin-v0.2-fs.exe
For Cyan, Magenta, Yellow, Gray colors: http://xtknight.atothosting.com/tools/gradlin-cmy-v0.3.exe
For Cyan, Magenta, Yellow, Gray colors (fullscreen; press ESC to exit): http://xtknight.atothosting.com/tools/gradlin-cmy-v0.3-fs.exe

If you see vertical conglomerates of colors, then that is banding. At least from my experience, lots of LCDs have bands of 5-10 pixels but if it's wider your LCD may be entering the sub-par territory.

 

[DasFox]

Cool thanks.

For Cyan, Magenta, Yellow, Gray colors those are the same apps?

Ok I hacked into that site:

http://xtknight.atothosting.com/tools/ And downloaded, gradlin-cmy-v0.3-fs.exe

LOL 🙂

THANKS

 

[xtknight]

Oh yeah, whoops, I put the wrong link up for cmy 0.3 fullscreen. Fixed. There are also some other cool tests in there. 🙂

Here's some calibration instructions using those tools (see near middle of page 1): http://forums.anandtech.com/messageview...atid=31&threadid=1838106&enterthread=y

 

[DasFox]

I'm not so up to things on all these gamma settings etc.. basically I understand some of it, but all the techno babble with that Tut of yours I'm lost with.

So do you have, or you can make up a "Monitor Adjustments For Dummies", you have something in real SIMPLE english, how one can go about doing all these things and bring out the best in their monitors.

THANKS

P.S. Sometimes I can only handle so much of the techno babble, LOL 😉

 

[DasFox]

I sure hope he's working on that "Monitor Adjustments For Dummies", I requested. 😉

ALOHA

 

[xtknight]

Well I may some day. 😉 The general premise is that you adjust your contrast until the banding is at its minimum, and from there to eliminate the color tinting on certain tones you just lower the color components in your monitor's manual R/G/B color adjustment setup. You can go farther as I suggest in my guide above but it's probably not necessary unless you really think you're giing to notice it.

 

[DasFox]

Ok

THANKS