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PS gradients? Banding like mad on B/cast monitor...

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jimmybee500
PS gradients? Banding like mad on B/cast monitor...
on Oct 12, 2006 at 1:58:02 pm

Hi,

I've just recently got a Sony Broadcast monitor hooked up through a Decklink and when previewing my Photoshop files I've noticed some really bad banding when I apply gradients (the finer/more subtle the grad, the worse it gets) that I don't get on my PC monitor.

Anyone know what causes this and how I can fix it?

I've noticed that using the gradient layer style (as opposed to the grad tool direct onto a layer) makes it worse. Blurring it makes it even worse than that!

HELP!

*AE 5.5 Pro - *PS CS1 - *Combustion 3
-------------------------------------
Win XP Pro SP2 / Intel P4 3GHz / 2GB RAM / GeForce FX5200 / BMD DeckLink Pro / Sony BVM-20G1E / DVS SDI Clipstation


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Richard Harrington
Re: PS gradients? Banding like mad on B/cast monitor...
on Oct 15, 2006 at 6:22:54 pm

Flatten gradient and add noise to it...

also... work in 10 bit space in video and create 16 bit graphics


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jimmybee500
Re: PS gradients? Banding like mad on B/cast monitor...
on Oct 16, 2006 at 9:05:52 am

Hi Richard, thanks for that - it kind of worked, but I am still getting a bit of banding and some random colours (reds, greens) on a dark grey>black grad..even in 16bit. Annoying!

Comparing identical 8bit & 16bit comps the 16 is a touch smoother, but still not right. It only really happens when the grad is very subtle. Black to white is OK for instance. The noise fix helps, but like I say, doesn't always eliminate these random colours and also needs to be applied quite heavily to cut out all the banding, in which case I've got a VERY grainy picture, which is not always what my client might want.

Are there any other fixes for this? My old Quantel Paintbox creates an identical gradient no problem...how does this work so differently when their technology is 15 years old!?! (It's a pile of junk otherwise btw..which is why I use PS now!)

One other thing - are there any other benefits to me working in 16bpc? Only it doubles my file sizes and we are still only currently work with 8bit video (upgrades soon hopefully) Can I use 16bit PS files to trans to 8bit video, or to 8bit AFX projects? 16bit AFX will drastically reduce my speed..

Thanks for your adivce thus far.

Jim.

*AE 5.5 Pro - *PS CS1 - *Combustion 3
-------------------------------------
Win XP Pro SP2 / Intel P4 3GHz / 2GB RAM / GeForce FX5200 / BMD DeckLink Pro / Sony BVM-20G1E / DVS SDI Clipstation


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jimmybee500
Re: PS gradients? Banding like mad on B/cast monitor...
on Oct 16, 2006 at 10:03:17 am

Add-on...

Plus it seems a bunch of filters don't work in PSCS1 when in 16bit mode? Is this improved in CS2 do you know? Should be upgrading to that soon.

Thanks very much.

*AE 5.5 Pro - *PS CS1 - *Combustion 3
-------------------------------------
Win XP Pro SP2 / Intel P4 3GHz / 2GB RAM / GeForce FX5200 / BMD DeckLink Pro / Sony BVM-20G1E / DVS SDI Clipstation


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Richard Harrington
Re: PS gradients? Banding like mad on B/cast monitor...
on Oct 16, 2006 at 12:25:08 pm

CS2 supports 16 bit layered files

Red and Green is moire pattern (optical illusion) be sure it is showing up on broadcast monitor

Reduce range in gradient (vdeo is not as good at large range then film)

16bc will help, even if going back to 8bc eventually... but more problems will re-occurr

Richard M. Harrington, PMP

Author: Photoshop CS for Nonlinear Editors, Understanding Adobe Photoshop, and ATS:iWork


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jimmybee500
Re: PS gradients? Banding like mad on B/cast monitor...
on Oct 16, 2006 at 2:55:09 pm

So in CS2 16bit fully supports everything that 8bit does? Top.

And just to clarify - If I just make up my grads in 16bpc for now and then slot them into an 8bpc file that'd work better then? (ie: I have no real reason to work totally in 16bpc at the mo, so as long as just my grads are made that way and imported in 8bit it should work ok yeah? No real benefits in working 16bpc if I'm ending up 8bit in the end anyway?

And the red/green artifacts - are you saying I SHOULD be seeing them in my broadcast monitor but not on my PC? Is that normal?

Thanks again Richard.

*AE 5.5 Pro - *PS CS1 - *Combustion 3
-------------------------------------
Win XP Pro SP2 / Intel P4 3GHz / 2GB RAM / GeForce FX5200 / BMD DeckLink Pro / Sony BVM-20G1E / DVS SDI Clipstation


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Richard Harrington
Re: PS gradients? Banding like mad on B/cast monitor...
on Oct 28, 2006 at 10:41:45 pm

CS2 supports most features...

I woudl work in 10 bit in your edit program if possible

Richard M. Harrington, PMP

Author: Photoshop CS for Nonlinear Editors, Understanding Adobe Photoshop, and ATS:iWork


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