Filters Main Function in Image Processing

I want to applied this three filter to a gray level image.

After that i want to save this image with using this file names (imsobel, imlaplas) in same current file.

I tried this but i can't do this.

I need a main fucntion.

%img =imread('cameraman.tif');

%Sobel filters

%Sx=[-1 0 1; -2 0 2; -1 0 1]

%Sy=[-1 -2 -1; 0 0 0; 1 2 1]

%T1=imfilter(img, Sx)

%T2=imfilter(img, Sy)

%imshow(T1)

%imshow(T2)

%Laplacian filters

&H= [0, -1, 0; -1, 4, -1; 0, -1, 0];

&T=imfilter(img, H)

%imshow(T)

% "imagefiles" variable contails each file detail (e.g. filename, size, etc.)

imagefiles = dir(['C:\Users\metec\Desktop\aa\', '*.tif']);

% Count total number of files

nfiles = length(imagefiles);

% Display total number of the files

disp(['Total number of file: ', num2str(nfiles)])

% Define filter kernel

%Laplacian filters

H = [0, -1, 0; -1, 4, -1; 0, -1, 0];

T=imfilter(img, H)

%imshow(T)

for idx = 1:nfiles

T=imfilter(img, H)

% Display name of each file

disp(imagefiles(idx).name)

currentfilename = [imagefiles(idx).folder , '\', imagefiles(idx).name];

currentimage = imread(currentfilename);

% Apply filter to current image using convn

result = convn(currentimage, T, 'same');

% Save the filtered image

imwrite(uint8(result),...

['C:\Users\metec\Desktop\aa\', 'imgLaplas', imagefiles(idx).name, '.tif'])

end