实验一1对一幅图像进行二值化处理loadtreesBWim2bwXmap04imshowXmapfigureimshowBW
2将一幅索引色图转化成灰度图像closeallclearallloadtreesIi
d2grayXmapimshowXmapfigureimshowI
f3将一幅灰度图转化成索引色图像closeallclearallIimreadmoo
tifXgraysliceI16imshowIfigureimshowXhot16
ff4显示一彩色图像的三基色图像footballimreadfootballjpgfigureNameFootballimshowfootballfigureNameFootballcolorpla
essubplot221imshowfootballredfootballfootballredfootball230subplot222imshowredfootballgree
footballfootballgree
football10gree
football30
fsubplot223imshowgree
footballbluefootballfootballbluefootball120subplot224imshowbluefootball
实验五编写lowpassfilterm和highpassfilrerm保存在work文件夹中
fcutoffisthecutofffreque
cyofthefilter005fu
ctio
fhighpassfilterszecutoff
ifcutoff0cutoff05errorcutofffreque
cymustbebetwee
0a
d05e
difrem
10
1error
mustbea
i
teger1e
dSsizeszerowsS1colsS2xo
esrows11colsfixcols21colsy1rowso
es1colsfixrows21rowsradiussqrtx2y2h1110radiuscutoff2
ho
esrowscolsh1plot3xyhtitleButterworth高通滤波器幅频响应Bfftshiftfft2szeresultifft2Bhfigureimshowabsresulttitle高通滤波后的图像
1Iimreadcamerama
tiflowpassfilterI041
fButterworth低通滤波器幅频响应
1
08
06
04
020505005005
低通滤波后的图像
Iimreadcamerama
tiflowpassfilterI0051
fButterworth低通滤波器幅频响应
10806040200505005005
低通滤波后的图像
2Iimreadcamerama
tifhighpassfilterI041
fButterworth高通滤波器幅频响应
08
06
04
02
00505005005
高通滤波后的图像
Iimreadcamerama
tifhighpassfilterI0051
fButterworth高通滤波器幅频响应
10806040200505005005
高通滤波后的图像
2分别采用Hammi
g窗，Bartlett窗，Ha
i
g窗和Blackma
窗设计近似圆对称的带通滤波器，通频带为【0105】。创建期望的频率响应矩阵Hdf1f2freqspace21meshgridHdo
es21rsqrtf12f22
fHdr01r050colormapjet64meshf1f2Hdh1fwi
d1Hdhammi
g21figurefreqz2h1h2fwi
d1Hdbartlett21figurefreqz2h2h3fwi
d1Hdha
i
g21figurefreqz2h3h4fwi
d1Hdblackma
21figurefreqz2h4期望的频率响应矩阵Hd
108060402010500511050501
f15
Mag
itude
1
05
0105005Fy1105Fx0501
108
Mag
itude
0604020105005Fy1105Fx0501
f15
Mag
ir