SuperResolution parameters

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I have a question about the parameters 'Iterations' and 'Temporal Radius' set during a super-resolution. superRes->set("iterations", iterations); superRes->set("temporalAreaRadius", temporalAreaRadius); Does the temporalAreaRadius define the number of images used in the super-resolution? Or is it part of the optical flow defining the area that it allows a pixel to move? One of the white papers referenced mentions using 5 images in a sliding window being used for super-resolution. If so, how come we usually skip the first frame as opposed to the first two? Is the 'iterations' parameter part of the optical flow, or defining a limit to the number of tries to obtain a super-resolution solution? Thanks for your help!