Focusing projection algorithm of image reconstruction

This paper discusses an algorithm for image reconstruction and puts forward a new algorithm which can be used in industry-the focusing projection algorithm of image reconstruction. This method only uses one ray beam source and one ray detector. The ray beam which comes from the source arrives at the detector after focusing on a section. The cross section is divided into four parts by the edges of beam. Two part values of it can be found. The value of pixel can be calculated by moving the focal point at the four corners of the pixel. Using sequential scanning, the value of all pixels can be found in this way and the image can be reconstructed. The algorithm needs only four values at four points of a picture element and just simple addition, subtraction and division calculations are necessary