refactored NoiseFrameGenerator
refactored NoiseFrameGenerator
implemented FrameFiles::expectAverageDifference
for_each_channel_accumulate should_call_functor_for_each_channel_in_parallel_in_both_images_and_sum_the_results, should_call_functor_for_each_pixel_in_parallel_in_both_images
for_each_channel_accumulate_test should_include_the_initial_value
for_each_channel_accumulate_test should_return_initial_value_for_empty_images
refactored for_each_channel_accumulate_test
for_each_channel_accumulate_test should_throw_when_image_dimensions_dont_match
simplified FrameFiles::averageDifference
stack_many_frames_to_reduce_noise passes, added GIL extensions