Pass images instead of filenames to certain methods in decrosstalk

[arielleleon]

From this PR: #18

From @jkim0731
Instead of passing paths and frame index, can we re-factor def decrosstalk_roi_image_single_pair_from_episodic_mean_fov to take two images only? (on top of pixel_size, grid_interval, and max_grid_val). I think that was what BOQC had, I don't understand the need to passing fn and frame index instead.

From @jkim0731
If this refactoring possible, L202, p1y, p1x = get_motion_correction_crop_xy_range_from_both_planes(oeid, paired_id, input_dir) can be brought up one level to here and be calculated only once.

These are very valid comments but I will need to refactor a bit to pass in images to the functions. BOQC had the LIMS db to pull from and I will need to add better folder queries to get relevant filepaths.