"mapping" projection

General Discussion Other

ines.f

in General Discussion • Other • 7 months ago

Hello everyone!

I'm struggling with something right now and I have no idea how to solve this so maybe one of you can give me a hand, I hope...

I'm making a video instalation but the thing is that the projector is a bit too high compared to the projection screen (and it really has to be there), so I kinda need to "map" the image so it's not distorted. The video is a capture from a webcam and I don't know what my options are... I tried the keystone library but I get a lot of problems because I'm working on windows, and actually the program becomes a bit too heavy... I was thinking maybe I can work this out putting the image in a "3D environment" or so? Or maybe there is some really simple way that I don't know of?

Thanks in advace

Replies(4)

ZenArtist

Re: "mapping" projection

7 months ago

My projector has a keymap of its own that I can access in the menu. It allows me to adjust the projection angles to match a screen, manually. Does your projector have that ability in its menu?

- James

ines.f

Re: "mapping" projection

7 months ago

no... it doesn't... that is the problem =/

Chrisir

Re: "mapping" projection

7 months ago

it's called trapez or trapez correction, right?
can you borrow another projector?

http://en.wikipedia.org/wiki/Video_projector

tfguy44

Re: "mapping" projection

7 months ago

import processing.opengl.*;
PImage fakeCamImage;
void setup(){
size(600,400,OPENGL);
fakeCamImage = loadImage( "http://s3.freefoto.com/images/12/13/12_13_4_web.jpg" );
textureMode(NORMALIZED);
}
void draw(){
background(fakeCamImage);
if( !keyPressed ){
background(0);
beginShape(QUAD);
texture(fakeCamImage);
vertex(0,0,0,0);
vertex(width,0,0,1,0);
vertex(width-50,height,0,1,1);
vertex(50,height,0,0,1);
endShape();
}
}