Atgp-vca projection vector obtaining method

The present invention relates to the technical field of image processing. The present invention provides a simple ATGP-VCA projection vector obtaining method not only improves the stability of the multiple endmember extraction, but also greatly reduces the complexity of the algorithm. The method comprises: S1: The Set hyperspectral observation vector r obtained projected in the initial value W0, and configured auxiliary matrix U; S2: beginning the iterative calculation, the vector space is obtained at each current iteration number n according to the auxiliary matrix the maximum projection value vector and the difference vector of the minimum value of the projection on the dimension vectors ai i; S3: determining whether the current iteration n is p-1, and if yes, end the iteration, the difference between the projected vector ai is the value wn , where p is the desired end of the extracted metadata; S4: If the current iteration number n is not p-1, the update support matrix U = [w1 ...... wn], return to step S2, into the next iteration.