Announcing the 2009 East Coast Blend Meet - Page 2

Yep, the smaller the screen, the less of a problem you'll have in this area.

During Williams first meet, I recall Terry indciating how well he did when he played around with the colors on the blend. And that's why there's no contrast boards in his projectors.

There is no supported 1:1 with the Blendzilla. This is simply because there are preset output resolutions going to the projectors, none of which match the given source material (1920x1080 or 1920x817)


Care to share your secret? I use my Spectracal Hubble (Sencore OTC1000) with CalMan Pro to setup one projector. Then I do the second by eye using a horizontal grey scale pattern to match the D65 calibrated first pj.


This is precisely why I have a Lumagen Radiance in my setup. I can perfectly tweak the gamma curve in any step, and keep white where its supposed to be.

OK< that makes sense.



The horizontal grey scale is key, but don't use your eye. First calibrate the left projector, then match the righ to the left, but do so using the horizontal grey scale pattern. First match the top and bottom (black/white). But do so wit the color meter. Do this starting with green only. Match the right projectors green to the left projector, from there do the same with red and blue. There's a bit more, but the key is the hor grey scale and green only initially.

Re: 1:1 mapping in addition to the horizontal lines, the DVX has an internal buffer of horizontal 1920 pixels, so even if you choose one of the output resolutions to account for the blend width, the DVX is going to resample internally and you'd get aliasing. I asked this to DVX's engineers and they confirmed the limitation (I implemented a pure software-based blend which does not have this limitation and I perceive it as significantly sharper).

Hmm.. are they trying to correct on this? I mean for as much as those units cost, shouldn't they be trying to reprogram them to make more flexible and rates for 1:1 mapping. I nice product, but it blows my mind that Ive not seen any real updates or changes to its original firmware. When we know, these changes can be done in firmware.


Oh, sometime later. I'll post more of blending. We also use a special PC based primary charting software. It's a must for the top end DLP commercial projectors. They have about three times the colors controls that's found in CRT projectord. veyr complicated to setup for color matching when blending, so much so, that you have to use the special chart. And the best thing to use the eye for is pastel colors. When following pastel colors the secondaries are more accurate and primaries follow...

I was rushing out this morning and did not cover this well. It's a process that requires a PC base Chromaticity chart.

Once the left projector is properly calibrated, you then align the right one using the horizontal grey ramp and a color meter. This process was shared with me and since then I've been using it with great success.

But before it will work well on a Marquee, you'll have to make sure there's no noticeable banding. Lowering or eliminating the banding is the first thing that should be done. And that can be done in how you separate the lines. And when done right, there's no real need to play back and forth with geometry. It is something I had demonstrated on Williams setup.

One day, I'll see what I can do to post the procedure on my setup...

Banding is not an issue for me.

I'm still confused with your procedure for colour matching with the colorimeter.

I calibrate the left pj to D65 with the colorimeter. Using the horizontal grey scale pattern I then color match by eye, so to my eye, the right pj matches the calibrated pj. If I use the colorimeter on the right pj also, what's the point of needing the horizontal grey scale? When do you use it? I use 30 and 80IRE windows for D65 calibration.

You'll need to first match the top and bottom green bars with the left projectors top and bottom green bars. From there you do the same with red and blue. And from there, you'll have to bring up the Chromaticity chart from a PC chart. from there you match the points on the right projector to the same points on the left projector. It's a little more to it than this, but this should give an idea of the procedure.

I'm not good at explaining things like this, so that's why I'll be doing it at Williams.

The upper end Christie Digital 3 chip projectors use a Chromaticity chart (provided by Christie) to properly align the colors when blending.

If you had to play with geometry to get rid of the blend zone, that's not the nest way to blend, especially if that process was used in the blend zone.

If you could get someone to take photos of you doing the setup and what the chromaticity chart looks like that would be awesome. I doubt I'll be able to make it to William's to see you do it first hand.

I'll make it happen for you. It's just that I'm not good at explaining this.

I did not use the chart at Williams, I only showed how to make the banding go away in the blend zone.

I showed it to William in a very brief manner on his setup, and not only did i make the banding go away, I did so without having to touch convergence and geometry.

I'm not allowed to share any other software that I'm using for what I do, but I think I'm good to post a picture of it. I'll get my hard drive...

I'll have to get back later with this...

i am so fricken there. just keep me full of alcohol

Please add me to the list as tentative, I'm to be in Kuwait from Oct 1 - Nov 20th, but things change. I really want to make this meet if I'm in country.

I'm getting ready!! Got a new smoker, and I think I'll join in with Arli on the free alcohol.

wallace

Smoker you say?

Alcohol?

Here it is. You just put in the numbers from your color meter, and it shows the points on the chart.

Yep. My old smoker finally burnt out. The door gasket was shot, and then the heating element went out. But, it put out some good BBQ!!!

So, here is my fathers day gift. http://store.cookshack.com/p-346-smo...essential.aspx


What?!?! Rock 'n Roll!!

wallace

Damn!!

oh me me sign me up, take those fricken question marks off my name

I`ll be there. smoking cigars in the new gazebo and using that antenna dish to park any partially used stoggies for later use.

Keeping Arli filled up with anything is a real challenge but worth it. One of the all time good guys.

Anybody needing a place to stay. I live a little over an hour away. Nice private guest wing in my house on the lake. PM me.

I'm still trying to swing it....but planing thios far off for me is the hard part i know more as the date gets closer

Athanasios

Cool! Glad to hear you're going to make it.

You should bring one of those subs you got just sitting around and leave it here.

wallace

RT from Buffalo to BWI will set you back only about $140 with fees and taxes and I`ll pick you up at the airport and take you back. You gotta buy your ticket early. Fly in Fri night and fly out late Sunday.

Looking forward to seeing you again!

Man! That is one ugly looking sea-gar!!!





wallace

That was my sixth helping of the world`s greatest BBQ.