clearallr
绘制直方图r
girlimread23p
gr
figure1r
imshowgirlr
title原图r
m
sizegirl测量图像尺寸参数r
GreyHistzeros1256预创建存放灰度出现概率的向量r
fork0255r
GreyHistk1le
gthfi
dgirlkm
计算每级灰度出现的概率，将其存入GreyHist中相应位置r
e
dr
figure2r
bar0255GreyHist绘制直方图r
title原直方图r
xlabel灰度值r
ylabel出现概率r
r
r
灰度拉伸r
girlgreygirlr
prompt请输入系数a请输入系数br
words请输入线性拉伸函数r
a
sweri
putdlgpromptwords1052r
astr2doublea
swer1r
bstr2doublea
swer2r
fori1mr
forj1
r
girlijagirlijbr
e
dr
e
dr
figure3r
imshowgirlr
title灰度拉伸r
r
GreyHistzeros1256预创建存放灰度出现概率的向量r
fork0255r
GreyHistk1le
gthfi
dgirlkm
计算每级灰度出现的概率，将其存入GreyHist中相应位置r
e
dr
figure4r
bar0255GreyHist绘制直方图r
title拉伸后的直方图r
xlabel灰度值r
ylabel出现概率r