2009-01-09, 15:02
A lot of projectors have some sort of issue with alignment of the red green and blue pixel components, especially as they age. It occurs to me that this could be compensated for in software by adjusting the alignment of the R,G and B channels in the data sent to the projector.
For example, with my AX200 the red channel is currently displaying about one pixel to the left, and the blue channel is displaying about one pixel to the right. If the red channel in the data sent to the projector was shifted one pixel right, and the blue one pixel left then I'd have a properly aligned image.
Now obviously the fact that my alignment pretty much matches the pixel boundaries would make it easier to fix in my case, but it seems likely to me that with sub-pixel interpolation you could apply the same principle for sub-pixel offsets.
I'm guessing this could probably be done *relatively* easily in a pixel shader?
Any thoughts?
For example, with my AX200 the red channel is currently displaying about one pixel to the left, and the blue channel is displaying about one pixel to the right. If the red channel in the data sent to the projector was shifted one pixel right, and the blue one pixel left then I'd have a properly aligned image.
Now obviously the fact that my alignment pretty much matches the pixel boundaries would make it easier to fix in my case, but it seems likely to me that with sub-pixel interpolation you could apply the same principle for sub-pixel offsets.
I'm guessing this could probably be done *relatively* easily in a pixel shader?
Any thoughts?
