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"""
Simple blur.
"""
from blur import blur
import halide.imageio
import numpy as np
import sys
import timeit
def main():
if len(sys.argv) < 3:
print(f"Usage: {sys.argv[0]} input.png output.png")
print(f"e.g. {sys.argv[0]} input.png output.png 10")
sys.exit(1)
input_path = sys.argv[1]
output_path = sys.argv[2]
timing_iterations = 10
print(f"Reading from {input_path} ...")
input_buf_u8 = halide.imageio.imread(input_path)
assert input_buf_u8.dtype == np.uint8
# Convert to uint16... but remember that the blur() generator
# is documented as only working on <= 14 bits of image; if
# we use the upper two bits we'll get incorrect results.
# We'll just leave it with 8 bits of useful data.
input_buf = input_buf_u8.astype(np.uint16)
output_buf = np.empty(input_buf.shape, dtype=input_buf.dtype)
tests = {
"Manual": blur,
}
for name, fn in tests.items():
print(f"Running {name}... ", end="")
t = timeit.Timer(lambda: fn(input_buf, output_buf))
avg_time_sec = t.timeit(number=timing_iterations) / timing_iterations
print("time: %fms" % (avg_time_sec * 1e3))
output_buf_u8 = output_buf.astype(np.uint8)
print(f"Saving to {output_path} ...")
halide.imageio.imwrite(output_path, output_buf_u8)
print("Success!")
sys.exit(0)
if __name__ == "__main__":
main()
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