Question

In MatLab, write your own program that uses the picture 'tire.tif' to perform histogram equilization using PMF and CDF.

Answer 1

I = imread('pout.tif');
J = histeq(I);
subplot(2,2,1);
imshow( I );
subplot(2,2,2);
imhist(I)
subplot(2,2,3);
imshow( J );
subplot(2,2,4);
imhist(J)

MATLAB Design

design_name = 'mlhdlc_heq';
testbench_name = 'mlhdlc_heq_tb';

Let us take a look at the MATLAB design

type(design_name);

type(testbench_name);

Simulate the Design

It is always a good practice to simulate the design with the testbench prior to code generation to make sure there are no runtime errors.

mlhdlc_heq_tb

Setup for the Example

Executing the following lines copies the necessary files into a temporary folder

mlhdlc_demo_dir = fullfile(matlabroot, 'toolbox', 'hdlcoder', 'hdlcoderdemos', 'matlabhdlcoderdemos');
mlhdlc_temp_dir = [tempdir 'mlhdlc_heq'];

% create a temporary folder and copy the MATLAB files
cd(tempdir);
[~, ~, ~] = rmdir(mlhdlc_temp_dir, 's');
mkdir(mlhdlc_temp_dir);
cd(mlhdlc_temp_dir);

% copy files to the temp dir
copyfile(fullfile(mlhdlc_demo_dir, [design_name,'.m*']), mlhdlc_temp_dir);
copyfile(fullfile(mlhdlc_demo_dir, [testbench_name,'.m*']), mlhdlc_temp_dir);
copyfile(fullfile(mlhdlc_demo_dir, 'mlhdlc_img_peppers.png'), mlhdlc_temp_dir);

Create a New HDL Coder™ Project

coder -hdlcoder -new mlhdlc_heq_prj

Next, add the file 'mlhdlc_heq.m' to the project as the MATLAB Function and 'mlhdlc_heq_tb.m' as the MATLAB Test Bench.