Patent ID: 8208715

Claim:
An automatic 3D target detecting method, comprising steps of: receiving a digital image and a LiDAR (Light Detection And Ranging) datum and picking a first parameter therefrom; generating a 3D image according to the first parameter; selecting a target in the 3D image and picking a second parameter thereof; calculating the second parameter for generating a first threshold of the target; automatically detecting the 3D image and selecting an area meeting the first threshold therein; and generating a selecting tool having a dilation searching function according to at least one of the first parameter and the second parameter, wherein the dilation searching function comprises steps of selecting rid from the area as an interesting point, collecting a plurality of third parameters of a first group of grids being around the interesting point, calculating a standard deviation of the third parameters, determining a specific multiple of the standard deviation to define a second threshold, selecting a first added grid meeting the second threshold from the first group of grids, and searching a second group of grids for selecting a second added grid meeting a third threshold, wherein the second group of grids surround the first added grid.