lter1medfilt2J233窗口大小为3×3
ffigureimshowI_Filter1I_Filter2medfilt2J255窗口大小为5×5figureimshowI_Filter2I_Filter3medfilt2J277窗口大小为7×7figureimshowI_Filter3
7采用MATLAB中的函数filter2对受噪声干扰的图像进行均值滤波ImapimreadeighttiffigureimshowItitleorigi
alJ1im
oiseIgaussia
0002受高斯噪声干扰M4010101010M4M444邻域平均滤波I_filter1filter2M4J1figureimshowI_filter1mapM81111011118邻域平均滤波M8M88I_filter2filter2M8J1figureimshowI_filter2map8图像的自适应魏纳滤波ImapimreadeighttiffigureimshowItitleorigi
alJ1im
oiseIgaussia
0002受高斯噪声干扰K
oisewie
er2J155figureimshowK9运用5种不同的梯度增强法进行图像锐化Imapimread322jpgimshowImapIdoubleIGxGygradie
tI计算梯度GsqrtGxGxGyGy注意是矩阵点乘J1GfigureimshowJ1map第一种图像增强J2I第二种图像增强Kfi
dG7J2KGKfigureimshowJ2mapJ3I第三种图像增强Kfi
dG7J3K255
ffigureimshowJ3mapJ4I第四种图像增强Kfi
dG7J4K255figureimshowJ4mapJ5I第五种图像增强Kfi
dG7J5K0Qfi
dG7J5Q255figureimshowJ5map10图像的高通滤波和掩模处理Imapimreadblood1tifimshowImapH2111191111J1filter2H2I高通滤波figureimshowJ1mapIdoubleIM1111111119J2filter2MIJ3IJ2掩模figureimshowJ3map11利用巴特沃斯（Butterworth）低通滤波器对受噪声干扰的图像进行平滑处理IimreadSatur
tifimshowIJ1im
oiseIsaltpepper叠加椒盐噪声figureimshowJ1fdoubleJ1数据类型转换，MATLAB不支持图像的无符号整型的计算gfft2f傅立叶变换gfftshiftg转换数据矩阵MNsizeg
2二阶巴特沃斯Butterworth低通滤波器d050mfixM2
fixN2fori1Mforj1Ndsqrtim2j
2h110414dd02
计算低通滤波器传递函数resultijhgije
de
d
fresultifftshiftresultJ2ifft2resultJ3ui
t8realJ2figureimshowJ3显示滤波处理后的图像12利用巴特沃斯（Butterworth）高通滤波器对受噪声干扰的图像进行平滑处理Iimreadblood1tifimshowIfdoubleI数据类型转换，MATLAB不支持图像的无符号整型的计算gfft2f傅立叶变换gfftshiftg转换数据矩阵MNsizeg
2二阶巴特沃斯Butterworth高通滤波器d05mfixM2
fixN2fori1Mforj1Ndsqrtim2j
2ifd0h0elseh110414d0d2
计算传递函数e
dresultijhgije
de
dresultifftshiftresultJr