5a 
texture=imread('C:\Users\home\Desktop\1.jpg');

subplot(2,2,1);
imshow(texture);
title('Original Image');

gray_texture = rgb2gray(texture);

subplot(2,2,2);
imshow(gray_texture);
title('Grayscale Texure');

sigma= 2;
gaussian_kernal=fspecial('gaussian',[5,5],sigma);
gaussian_filtered= imfilter(gray_texture,gaussian_kernal,'replicate');

subplot(2,2,3);
imshow(gaussian_filtered);
title('Gaussian Filtered')

5b
img=imread('C:\Users\home\Desktop\im.jpg');
graying=rgb2gray(img);
histequalimg=imhistequal(graying);
imshow(img);title("original img");
figure;imshow(graying);title("gray img");
figure;imshow(histequalimg);title("histogram image");

segemention
clc
clear all
show_window(3);
I2=imread('C:\Users\home\Desktop\16.jpg');
subplot(221);
imshow(I2);
title('original Grayscale image');
x=im2double(I2);
d=im2bw(x,0.5);
subplot(222);
imshow(d);
title('Global Thresholding T-0.5');
Id=x;
T=0.5*(min(min(Id))+max(max(Id)));
deltaT=0.001;
done=0;
while ~done
    g = Id >= T;
    Tnext = 0.5*(mean(Id(g)) + mean(Id(~g)));
    done = abs(T - Tnext) < deltaT;
    T = Tnext;
end
subplot(223);
d=im2bw(x,T);
imshow(d);
title('Global Thresholding using own code ');
th=imgraythresh(I2)
g=im2bw(I2,th)
subplot(224);imshow(g);
title('otsu thresholding method');