#author bo town, uploaded in 2023.4.19
1.Coil profile----This example is to mark the coil outline with packaging
2.Coin counting----The number of coins in the graph was counted by morphological method
3.Face image beautification----The face in the image is beautified by bilateral filtering combined with other methods
4.License plate recongnition----Detect and locate the license plate in the graph with the back projection of histogram