Update app.py

app.py

@@ -49,6 +49,7 @@ def fourier_transform_drawing(input_image, frames, coefficients, img_size):
 
     t_list = np.linspace(0, tau, len(xs))
 
+    # compute the Fourier coefficients
     def f(t, t_list, xs, ys):
         return np.interp(t, t_list, xs + 1j * ys)
 
@@ -77,7 +78,7 @@ def fourier_transform_drawing(input_image, frames, coefficients, img_size):
     #     return coef
 
     N = coefficients
-    coefs = [(compute_cn(f, 0), 0)] + [(compute_cn(f, j), j) for i in range(1, N+1) for j in (i, -i)]
+    coefs = [(compute_cn(f, 0, t_list, xs, ys), 0)] + [(compute_cn(f, j, t_list, xs, ys), j) for i in range(1, N+1) for j in (i, -i)]
 
     # animate the drawings
     fig, ax = plt.subplots()