Real-time 3-D object rotation-invariant recognition with microlens array

In order to realize 3-D object rotation-invariant recognition, with help of high relevancy of perspective array of 3-D objects, the depth information of 3-D objects was converted to 2-D elemental images by means of microlens array.Theoretical analysis showed that both 3-D object rotation-invariant recognition and exact orientation of rotation direction could be obtained.Taking a dice,a 3-D object as an example, it was recognized in real time by means of match filtering and the proposed method.The latter performed better, and the exact orientation of rotation direction and rotational angle size discrimination were recognized.The results showed that the real-time 3-D object rotation-invariant recognition can be accomplished with microlens array.