def eulerian_magnification(vid_data,
fps,
freq_min,
freq_max,
amplification,
pyramid_levels=4,
skip_levels_at_top=2):
vid_pyramid = create_laplacian_video_pyramid(vid_data,
pyramid_levels=pyramid_levels)
for i, vid in enumerate(vid_pyramid):
if i < skip_levels_at_top or i >= len(vid_pyramid) - 1:
# ignore the top and bottom of the pyramid. One end has too much noise and the other end is the
# gaussian representation
continue
bandpassed = temporal_bandpass_filter(
vid,
fps,
freq_min=freq_min,
freq_max=freq_max,
amplification_factor=amplification)
play_vid_data(bandpassed)
vid_pyramid[i] += bandpassed
play_vid_data(vid_pyramid[i])
vid_data = collapse_laplacian_video_pyramid(vid_pyramid)
return vid_data
def test_uint8_to_float_and_back_for_video():
vid_data, fps = _load_video(TEST_VIDEO_PATH)
vid_float = uint8_to_float(vid_data)
vid_unit8 = float_to_uint8(vid_float)
vid_diff = vid_data - vid_unit8
play_vid_data(vid_float)
assert vid_diff.max() <= 1
def test_eularian_magnification():
# ('baby', 10, 16, 0.4, 3, 30),
orig_vid, fps = load_video_float(TEST_VIDEO_PATH)
enhanced_vid = eulerian_magnification(orig_vid,
fps=30,
freq_max=0.77,
freq_min=0.4,
amplification=30)
play_vid_data(enhanced_vid)
def eulerian_magnification(vid_data, fps, freq_min, freq_max, amplification, pyramid_levels=4, skip_levels_at_top=2):
vid_pyramid = create_laplacian_video_pyramid(vid_data, pyramid_levels=pyramid_levels)
for i, vid in enumerate(vid_pyramid):
if i < skip_levels_at_top or i >= len(vid_pyramid) - 1:
# ignore the top and bottom of the pyramid. One end has too much noise and the other end is the
# gaussian representation
continue
bandpassed = temporal_bandpass_filter(vid, fps, freq_min=freq_min, freq_max=freq_max, amplification_factor=amplification)
play_vid_data(bandpassed)
vid_pyramid[i] += bandpassed
play_vid_data(vid_pyramid[i])
vid_data = collapse_laplacian_video_pyramid(vid_pyramid)
return vid_data
def test_eularian_magnification():
# ('baby', 10, 16, 0.4, 3, 30),
orig_vid, fps = load_video_float(TEST_VIDEO_PATH)
enhanced_vid = eulerian_magnification(orig_vid, fps=30, freq_max=0.77, freq_min=0.4, amplification=30)
play_vid_data(enhanced_vid)
