84.1.2直方图修正(续3) 均匀化过程s=T(k)=Σp(),j=0…k 原灰度级变换函数T(r)的值像素数量化级新灰度级新灰度级分布 T(r0)=S0=019 790 7T(r1)=S1=0.19+0.2510230.14 So(790)790/4096=0.19 7T(2)=S2=044+0.21850029 3=3/7T(r3)=S3=065+0.1665604351(1023)10234096=0.25 T(r4)=S4=0.81+0.083290.57 T(rs)=Ss=0.89+006245 S2(850)8504096=0.21 T(r6)=S6=095+003122 S3(985)850/4096=0.24 r=1 T(r)=S7=0.19+002810 s4(48)448/4096=0.11§4.1.2 直方图修正(续3) • 均匀化过程 sk = T(rk ) = ∑ pr (rj ) ，j=0,…,k • 原灰度级 变换函数T(rk ) 的值 像素数 量化级 新灰度级 新灰度级分布 • r0=0 T(r0 )= s0=0.19 790 0 0 • r1 =1/7 T(r1 )= s1=0.19+0.25 1023 0.14 s0 ’ (790) 790/4096=0.19 • r2 =2/7 T(r2 )= s2=0.44+0.21 850 0.29 • r3 =3/7 T(r3 )= s3=0.65+0.16 656 0.43 s1 ’ (1023) 1023/4096=0.25 • r4 =4/7 T(r4 )= s4=0.81+0.08 329 0.57 • r5 =5/7 T(r5 )= s5=0.89+0.06 245 0.71 s2 ’ (850) 850/4096=0.21 • r6 =6/7 T(r6 )= s6=0.95+0.03 122 0.86 s3 ’ (985) 850/4096=0.24 • r7 =1 T(r7 )= s7=0.19+0.02 81 0 s4 ’ (448) 448/4096=0.11