Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Add EPSILON to amp for numerical stability for division #907

Merged
merged 1 commit into from
Nov 18, 2024
Merged

Add EPSILON to amp for numerical stability for division #907

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 2 additions & 1 deletion alibi_detect/od/sr.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -248,7 +248,8 @@ def saliency_map(self, X: np.ndarray) -> np.ndarray:

fft = np.fft.fft(X)
amp = np.abs(fft)
log_amp = np.log(amp)
# For numerical stability for division to prevent divide by zero being encountered add EPSILON
log_amp = np.log(amp + EPSILON)
phase = np.angle(fft)
# split spectrum into bias term and symmetric frequencies
bias, sym_freq = log_amp[:1], log_amp[1:]
Expand Down
Loading