hi dears

Ihave designed a chebyshev 1 filter bymatlab by impulse invariance method
with these below codes

now I want to perform this filter on an image and see the result effect on this
image, so how can do this? with which code in matlab??please help me.

% Chebyshev type I polynomials, Impulse Invariance, Method 1

clear all; close all;clc;

wp=.2*pi,ws=.3*pi,dp=1,ds,Fs=1;

[n,wc]=cheb1ord(wp,ws,dp,ds);

%n = 4;

[z,p,k]=cheb1ap(4,dp);

Wc=Fs*(wc);% Prewarping

[bs,as] = zp2tf(z,p,k);%Convert zero-pole-gain filter parameters to transfer
function form

[bst,ast] = lp2lp(bs,as,Wc);%Change cutoff frequency for lowpass analog
filter

[b1,a1] = impinvar(bst,ast,Fs);

[H1,w] = freqz(b1,a1);