1. 演算法有關 (Single frame, Double frames, ...etc.)
2. 殘影 .vs. 模糊 .vs. 色塊


Noise Reduction 可以用軟體來做.
比如DScaler Noise Reduction Filters,
Alparysoft Denoise Filter : http://www.alparysoft.com/products.php?item=16

Noise Reduction 的演算法有很多,
DScaler : Adaptive Noise Reduction, Gradual Noise Reduction, ...
Alparysoft Denoise Filter :