for this device (https://github.com/Ildaron/Laser_control https://github.com/Ildaron/Laser_control), who has ideas for detect small object in x,y,z, please shar

for this device (https://github.com/Ildaron/Laser_control https://github.com/Ildaron/Laser_control), who has ideas for detect small object in x,y,z, please share (except stereovision, and lidar)