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Ghosting effect after lining up test patterns from two projectors and stirring the water. Water level at ca 10cm.
Ghosting effect after lining up project content from two projectors and stirring the water. Water level at ca. 10cm.
Ghosting effect after lining up project content from two projectors and stirring the water. Water level at ca. 20 cm.
After increasing the water levels from 10cm to 20cm the mapping went off due to the change of distance the light ray has to travel to the projection surface once its refracted at the water surface. This means that changes in water levels due to rain etc. will change the alignment but it could be realigned quite quickly by shifting the projection up and down.
Ghosting effect after lining up project content from two projectors and stirring the water. Water level at ca. 6 cm.
If my physics knowledge doesn't betray me here I think our set up should give us an accurate idea of what will happen once it's all scaled up because a light ray is a light ray, no matter whether it comes from a pico projector or a bigger one. The variable that creates the ghosting effect is the depth of the water which means that keeping the water levels constant is important for keeping the blending area aligned well.
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