matlab 图像信号 FFT 锐化,等内容

http://www.ilunwen.com/list_paper_content.php?id=24238

temp_image=imread('laba.jpg');
temp_image=rgb2gray(temp_image);                                  % 将图象变为黑白
temp_image=im2double(temp_image);                                % 转化为二维double矩阵
move1=fftshift(fft2(temp_image));                                      %将频谱转到中心
Lap_count=fspecial('laplacian');                                          % lapalace filter
image_lap1=filter2(Lap_count,temp_image,'same');           % 用lapalace滤波
image_lap=temp_image-image_lap1;
image_adjust=imadjust(image_lap,[],[0,0.8]);
move2=fftshift(fft2(image_lap1));                                       %再将频谱到中心
>> imshow(temp_image);
>> figure,imshow(move1);
Warning: Displaying real part of complex input.
> In imuitools\private\imageDisplayParseInputs>validateCData at 286
  In imuitools\private\imageDisplayParseInputs at 205
  In imshow at 151
>> figure,mesh(abs(move1));
>> figure,imshow(image_lap1);
>> figure,imshow(image_lap);
>> figure,imshow(image_adjust);
>> figure,imshow(move2);
Warning: Displaying real part of complex input.
> In imuitools\private\imageDisplayParseInputs>validateCData at 286
  In imuitools\private\imageDisplayParseInputs at 205
  In imshow at 151
>>