Spatial Filtering etc

Assistance for Chapter 3 initial parts from Gonzalez and Woods,

Usage Help: Un-comment(Ctrl+T in Matlab) the required part of filtering and Run(F5) to understand the fun.
<Please keep a copy of a picture named as (1).jpg in the Matlab folder.

clc;

%% Read Image

X = imread('(1).jpg');

X = rgb2gray(X);

%% Histogram Equalisation of Image

% 

% figure;

% imhist(X);

% figure;

% histeq(X);

% figure;

% 

% imhist(histeq(X));

%% Gaussian Filtering of image

% fgauss = fspecial('gaussian',[3,3],1.0)

% filtim = imfilter(X,fgauss,'symmetric', 'conv');

% 

% subplot(1,2,1)

% imshow(X);

% subplot(1,2,2)

% imshow(filtim);

% figure

% imshow(X-filtim);

%% Spatial Filtering Smoothing <Weighted> &High Boost Filtering

% 

% favg = [1/16 2/16 1/16; 2/16 4/16 2/16; 1/16 2/16 1/16]

% filtim = imfilter(X,favg,'symmetric', 'conv');

% 

% subplot(2,2,1)

% imshow(X);

% title('Original');

% 

% subplot(2,2,2)

% imshow(filtim);

% title('Weighted Filtering');

% 

% subplot(2,2,3)

% imshow(X-filtim);

% title('Difference Image');

% 

% subplot(2,2,4)

% imshow(X+0.2.*(X-filtim));

% title('High Boost Sharpened');

% 

%% Median Filtering <Doubt, Anybody who knows please assist in this, right now the code is substituting %Median of first block for all the blocks>

% 

% filtim = imfilter(X,(double(median(median(X)))),'symmetric', 'conv');   %takes a single value for all the %matrices, how to make it floating

% 

% subplot(2,2,1)

% imshow(X);

% title('Original');

% 

% subplot(2,2,2)

% imshow(filtim);

% title('Median Filtering');

% 

% subplot(2,2,3)

% imshow(X-filtim);

% title('Difference Image');

%% Laplacian

% flap1 = fspecial('laplacian', .2);

% filtim1 = imfilter(X,flap1,'symmetric', 'conv');

% flap2 = -flap1;

% 

% subplot(2,2,1)

% imshow(X);

% title('Original');

% 

% subplot(2,2,2)

% imshow(filtim1);

% title('Laplacian Filtering - 1');

% 

% filtim2 = imfilter(X,flap2,'symmetric', 'conv');

% subplot(2,2,3)

% imshow(filtim2);

% title('Laplacian Filtering - 2');

% 

% subplot(2,2,4)

% imshow(X+(filtim1));

% title('Reconstructed after Laplacian');

%%