aracteristic the spatial a candidate for, we N a picture casts shadow the characteristic space of the lower the degree of , we call it as characteristic space or persons a space [ 7,8 ] .In characteristic space, each characteristic explained the different variety in inside in a picture in person.РSay this characteristic space for the sake of Chien, suppose a picture gather the I1, I2, I3, …, IM, among them each picture is the row vector of a N , and with posing person a space.The average value that this training( test) gather uses the A= define.Use the i= the I I - putes the zero average number of each , and with posing a new vector.puting the M keep handing over vector, among them that vector is to uses e to describe the person best a picture ground distribute, first, the usage C= i ir= Y
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