1. 製造 guidance image
如果 p 在兩整數像素的中點 → linear
否則採用 nearest neighbor
2. 應用 Joint Bilateral Filtering
$$\tilde{S}_p = \frac{1}{k_p} \sum_{q_i \in \Omega} S_{q_i} \space f(||p_↓-q_↓||) \space g(||\tilde{I}_p-\tilde{I}_q||)$$
Output
normalizing factor
3x3 window
input
spatial filter (truncated Gaussian)
Text
By Petingo
Taiwan