Kuroki et al. (2012, http://onlinelibrary.wiley.com/doi/10.1889/1.2451560/abstract) conducted an interesting psychophysical study. I’ve tried to consider the “soap opera” impression (http://blog.oup.com/2013/01/high-frame-rate-hobbit-psychocinematics/). I would be interested in others’ ideas about the cognitive underpinnings of HFR.
2 thoughts on “Cognitive Features of HFR”
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Dear Art.
Very interesting post (I refer to the blog.oup.com).
One question / doubt: you say:
“The obvious one is that actions recorded at more rapid frame rates, such as a car chase shot at 48 fps vs 24 fps, would reduce by half the distance objects move across successive frames. With HFR we are presented shorter increments of movement, and our brains need not work as hard to extrapolate apparent motion across frames, which may result in a smoother sense of motion. ”
I do not quite understand that, because the eye/brain need “readout” time, even though I do not exactly know how much it is. So, feeding the system with more frames per second will not necessary decrease the brain’s working task. In the end it will not make any difference, when the frame rate of the information fed > frame read of readout?!
Best wishes
Maarten
Yes, my phrase “our brains need not work as hard” should be viewed as poetic license for OUP blog readers as brain/mental effort is quite complex as our expectation of what we are about to see greatly influences stimulus processing (e.g., readout) time/effort. What is clear from the Kuroki et al (2012) study is that to perceive very smooth movement from sharp moving images (i.e. no motion blur), it is necessary to have HFRs of 250 or greater. At lower frame rates, movements appear jerky, which would suggest that our brains can’t register the frame-to-frame movement disparity in a natural manner (unless there is motion blur in each frame shot).