def test_time():
# Tests performance on random data, ignoring compression ratio
data = np.random.rand(101, 101, 10001)
compressed = st_hosvd.compress_tucker(data,
0,
rank=(22, 21, 19),
print_progress=True)
decompressed = st_hosvd.decompress_tucker(compressed)
print_difference(data, decompressed)
st_hosvd.print_compression_rate_tucker(data, compressed)
plot_comparison(data, decompressed)
def compress_mauna_kea():
data = load_mauna_kea()
compressed = st_hosvd.compress_tucker(data,
0.025,
print_progress=True,
use_pure_gramian=True)
print(
"Relative error:",
custom_norm(st_hosvd.decompress_tucker(compressed).__isub__(data)) /
custom_norm(data))
st_hosvd.print_compression_rate_tucker(data, compressed)
def test_compression_ratio_tucker():
print("=" * 20 + " Phase 1 " + "=" * 20)
data = load_pavia_centre()
compressed1 = st_hosvd.compress_tucker(data,
0.025,
reshape=False,
method="tucker")
decompressed = st_hosvd.decompress_tucker(compressed1)
st_hosvd.print_compression_rate_tucker(data, compressed1)
print_difference(data, decompressed)
"""
def compare_times():
data = load_cuprite()
original_size = data.dtype.itemsize * data.size
st_hosvd.print_compression_rate_tucker(
data, st_hosvd.compress_tucker(data, 0.025))
start = time()
compressed = st_hosvd.compress_quantize2(
st_hosvd.compress_tucker(data, 0.025))
print("Time for compression:", time() - start)
start = time()
decompressed = st_hosvd.decompress_tucker(
st_hosvd.decompress_quantize2(compressed))
print("Time for decompression:", time() - start)
st_hosvd.print_compression_rate_quantize2(data, compressed)
print_difference(data, decompressed)
start = time()
compressed = other_compression.compress_jpeg(data, 50)
print("Time for compression:", time() - start)
start = time()
decompressed = other_compression.decompress_jpeg(compressed)
print("Time for decompression:", time() - start)
print("Compressed size:",
other_compression.get_compress_jpeg_size(compressed))
print("Compression ratio:",
other_compression.get_compress_jpeg_size(compressed) / original_size)
print_difference(data, decompressed)
start = time()
compressed = other_compression.compress_video(data, 28)
print("Time for compression:", time() - start)
start = time()
decompressed = other_compression.decompress_video(compressed)
print("Time for decompression:", time() - start)
print("Compressed size:",
other_compression.get_compress_video_size(compressed))
print(
"Compression ratio:",
other_compression.get_compress_video_size(compressed) / original_size)
print_difference(data, decompressed)