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Also attenuate high frequencies at 45°

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CFA is sometimes orientated at 135°, sometimes at 45° so until we find if there is a law depending on the screen size, e-reader model or something, the best we can do is attenuate high frequencies on those two directions
This commit is contained in:
Its-my-right
2025-07-15 00:06:21 +02:00
committed by Alex Xu
parent 0d967084a0
commit 63a18627d3
1 changed files with 5 additions and 1 deletions
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6
kindlecomicconverter/rainbow_artifacts_eraser.py
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@@ -64,11 +64,15 @@ def attenuate_diagonal_frequencies(fft_spectrum, freq_threshold=0.30, target_ang
# Calculation of complementary angle
target_angle_2 = (target_angle + 180) % 360
# Calulation of perpendicular angles (CFA is sometimes orientated at 135°, sometimes at 45°)
target_angle_3 = (target_angle + 90) % 360
target_angle_4 = (target_angle_3 + 180) % 360
# Create angular conditions in a vectorized way
angle_condition = np.zeros_like(angles_deg, dtype=bool)
# Process both angles simultaneously
for angle in [target_angle, target_angle_2]:
for angle in [target_angle, target_angle_2, target_angle_3, target_angle_4]:
min_angle = (angle - angle_tolerance) % 360
max_angle = (angle + angle_tolerance) % 360