standard projection
1.Christie Digital Systems, USA Inc, sets the world standard in vibrant, high brightness projection systems.
2.Different from the standard algorithm,the fast 2 D back projection(2D FBP)proposed in this paper requires computational time O(N 2 log N 2).
3.The morphology of the PP/PET,PP/PET/EPDM-g-GMA blends are quantitatively analyzed by using image processing software for the first time and through which we obtain the structure imformation about the alloys such as the average diameterdp dp of the dispersed phase projection,the average chord length of the dispersed phase L1 and the continuous phase L2 and the particle diameter standard deviation σ.

