In a multi-disciplinary effort, we investigate the level of speckle that can be tolerated in a lasercinema projector based on a quality of experience experiment with movie clips shown to a testaudience in a real-life movie theatre setting. We identify a speckle disturbance threshold bystatistically analyzing the observers’ responses for different values of the amount of speckle, whichwas monitored using a well-defined speckle measurement method. The analysis shows that thespeckle perception of a human observer is not only dependent on the objectively measured amountof speckle, but it is also strongly influenced by the image content. The speckle disturbance limit formovies turns out to be substantially larger than that for still images, and hence is easier to attain.
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