How to do band pass filtering?

i have to do band pass filtering and contrast normalization in image to get the raw image pixels

Answer 1

[David Sanchez]

%By-pass filter with trnasfer function ( change as you please)
% 1000 s
%--------------------------
%100 s^2 + 11000 s + 100000
%define the variable
s=tf('s');
%Wite the transfer function
Hs=(1/((s/100)+1))*(((s/1000)/((s/1000)+1)));
%plot the filter
figure (1)
bode(Hs)
grid
title('By-pass filter')
figure (2)
pzmap(Hs)
grid
title('poles and zeros of By-pass transfer function')

[David Sanchez]

the given example has low cut-off frequency at 100 Hz and high cut-off frequency at 1000 Hz.