CurtPalme.com Home Theater Forum

[deronmoped]

Is there a program out there that allows you to adjust convergence through your computer?

Deron.

[Tim in Phoenix]

Hello

Most projectors in the last fifteen years have offered RS232 controlability, but I do not see that as any easier than an IR remote.

[Fujifrontier]

i think it would be fun

[WanMan]

Does the NEC software allow for this for NEC projectors? I have not tried it (too scared), and I do not have a serial cable even if I had the courage.

[macgyver655]

Yes, the NEC software gives you control over all functions of the projector.

[deronmoped]

I'm not explaining myself properly, let me try again.

I would like to be able to change the convergence "before" it reaches the PJ.

Just think, perfect convergence on start up, the computer adjusts for drift over a set amount of time as the PJ warms up.

Or how about you have some sort of convergence issue that you can not get perfect with the PJ. A software solution done to the signal before it gets to the PJ could correct certain things.

They already do different things to the image, it just has to be applied to red, green and blue separately.

Deron.

[macgyver655]

I'm getting a headache just thinking about that question. I thought thats what you were asking in your first post. I was answering WanMan's post. I think I'll wait and see if you get anyone else to respond. I'm not in the mood to write 10 paragraph's on that one.

[Sonynut]

My best input is that it would take much longer to "teach" the computer how much and where exactly the drift is at.. now with a camera, a computer-based converging system may work, but still be EXPENSIVE...

[AnalogRocks]

and have to take into acount time of year, seasonal temperature changes, humidity (?) and lots of other stuff.

Here maybe this will help:
.
.
.
.
.
.
.
.
.
.
.
.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

[AnalogRocks]

and have to take into acount time of year, seasonal temperature changes, humidity (?) and lots of other stuff.

Here maybe this will help:
.
.
.
.
.
.
.
.
.
.
.
.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

[stefuel]

I think it would be cheaper to just replace the projector in question than to build this super computer.

[audimushroom]

Hello

I think what would help here is that with the BARCO's the IRIS system provides almost what you want, which is assisted convergence, very clever system, not 100% I'm told and a better job can still be done manually but they do work.

[deronmoped]

You can do everything else in the world with a computer, being able to change how the red, green and blue overlay each other would just be another one of the millions of software programs that are out there. Heck, it might be able to be done through Photoshop.

Deron.

[deronmoped]

I was just taking a quick look at PhotoShop, here is something interesting, not sure if it can be done to a movie.


Video layers

Create and edit images for video with maximum quality and a broader range of color models. Edit and enhance grayscale, RGB, CMYK, and LAB models at 8-, 16-, and 32-bit depths with color management.

Deron.

[audimushroom]

Yes in principle but doing anything like this in realtime as would be required for Video needs serious computing power and whilst there are such solutions out there they are aimed at the broadcast industry and the prices I'm sure beyond a home user...

[David_Web]

Sure it can be done.
You can easily do it in realtime through a pixelshader.
mplayer homecinema can add a pixelshader to the movie. you can code one in HLSL.

"Just think, perfect convergence on start up, the computer adjusts for drift over a set amount of time as the PJ warms up. "
Sorry but that won't happen.
The convergence is still digital and can move a whole pixel minimum. On the pj you can move it a fraction of that.

If you find something you can't correct you have a serious problem elsewhere.

Still it would be fun.

[macgyver655]

[macgyver655]

Damn. Hit the submit key before I was done.



Analog: I like your bunny.

Still enjoying the comments.

Still not in the mood to write 10 paragraphs.

[deronmoped]

I was just doing a little searching around and found you can do all kinds of video editing. Here is a list of things that might be interesting for our CRT's.

1) Color adjustment. Might help out PJ's that need color correction.

2) Lightning effects filter. Could even out the level of light across the screen.

3) De-Interlace. Smooths moving images captured on video by removing either the odd or even interlaced lines in a video image. You can choose to replace the discarded lines by duplication or interpolation.

4) NTSC Colors
Restricts the gamut of colors to those acceptable for television reproduction, to prevent oversaturated colors from bleeding across television scan lines.

5) Smart Sharpen
Sharpens an image by letting you set the sharpening algorithm or control the amount of sharpening that occurs in shadows and highlights.

6) Sharpen Edges and Unsharp Mask
Find the areas in the image where significant color changes occur and sharpen them. The Sharpen Edges filter sharpens only edges while preserving the overall smoothness of the image. Use this filter to sharpen edges without specifying an amount. For professional color correction, use the Unsharp Mask filter to adjust the contrast of edge detail and produce a lighter and darker line on each side of the edge. This process emphasizes the edge and creates the illusion of a sharper image.

Not sure if these all can be applied to video, but it would be cool if they could.

Deron.

[AnalogRocks]

And the nicest thing about the bunny is it'll fit in your little bag with the pocket knife and the duct tape.

[AnalogRocks]

And the nicest thing about the bunny is it'll fit in your little bag with the pocket knife and the duct tape.

[macgyver655]

Maybe I can teach the bunny to gather up things I need for the next problem while I assemble it.




See, I told you this subject is giving me a haedache.