MATLAB: Matlab HDL coder can not perform to send an image matrix to a matlab function.How to resolve it

Question

————————————–Function which is called————————————–

function [xavg1,xavg,xhr,xvr,xdig] = cameraman_dwt_code1(xr1)

[xavg,xhr,xvr,xdig] = dwt2(xr1,'db3');

xavg1=xavg/255;

————————————–Testbench Code————————————–

x= imread('cameraman.tif');

x1=rgb2gray(x);

xavg11=cameraman_dwt_code1(x1);

imshow(xavg11);

Answer 1

https://www.mathworks.com/help/hdlcoder/examples/image-enhancement-by-histogram-equalization.html

'mlhdlc_heq.m' (DUT) and 'mlhdlc_heq_tb.m' (TestBench)

The example files show how to stream image into device under test (DUT). The example shows how to write MATLAB code suitable for HDL code generation for such streaming algorithms.