Set the Sweeper (clock 2 above) to one minute before your LWT. 8:14am in this example.
设置清扫车（闹钟2）：比LWT提前一分钟，即上午8:14。
2
A new texture feature extraction method using Local Walsh Transform (LWT) is presented. The definition of LWT is given. The statistical properties of LWT coefficients are analyzed.