Calculate the optical flow of the looming stimuli

We captured the image in each frame during the visual stimulation. Subsequently, we employed the MATLAB Optical Flow block (the mathematical algorithm is given at the end the letter ) from the Computer Vision Toolbox to estimate the optical flow vector for each pixel between two consecutive frames. The direction of pixel motion was determined by the horizontal and vertical components of the vector, while the speed or magnitude was calculated as the square of the vector's modulus. Finally, we computed the overall flow magnitude by summing the magnitudes of all the pixels. 1. main_optical_flow_calculation_eccentricity.m main script to perform this analysis 2. optical_flow_calcualtion.slx MATLAB Simulink script for calculating the optical flow. This module will be called by the main script. 3. Stimulus_SchematicDiagram.mat stores the visual stimulation images. 4. fun_opticalflow_eccentricity calculates optical flow at each eccentricit