Update app.py

app.py

@@ -61,7 +61,7 @@ def fourier_transform_drawing(input_image, frames, coefficients, img_size):
         Integrate the contour along axis (-1) using the composite trapezoidal rule.
         https://numpy.org/doc/stable/reference/generated/numpy.trapz.html#r7aa6c77779c0-2
         """
-        f_exp = np.interp(t, t_list, xs + 1j * ys) * np.exp(-n * t_values * 1j)
+        f_exp = np.interp(t_values, t_list, xs + 1j * ys) * np.exp(-n * t_values * 1j)
         coef = np.trapz(f_exp, t_values) / tau
         return coef