Half-Toning-Matlab-Implementation guide

Dithering & Error Diffusion implemented by Chen Xue Wen

Programs are not coded for efficiency but for readability.

Please do not copy and paste the code, try to understand and implement it yourselves.

This is purely for reference to help people to understand better.

Guide by Chen Xue Wen.

Short Introduction

A Printer can only print binary values: either print or not print. Thus this is where half-toning comes in handy.

Dithering

BayerFive:

.513 .272 .724 .483 .543 .302 .694 .453

.151 .755 .091 .966 .181 .758 .121 .936

.634 .392 .574 .332 .664 .423 .604 .362

.060 .875 .211 .815 .030 .906 .241 .845

.543 .302 .694 .453 .513 .272 .724 .483

.181 .758 .121 .936 .151 .755 .091 .966

.664 .423 .604 .362 .634 .392 .574 .332

.030 .906 .241 .845 .060 .875 .211 .815

Second Step: Multiply * 255 (Highest Value)

130.815 69.36 184.62 123.165 138.465 77.01 176.97 115.515

38.505 192.525 23.205 246.33 46.155 193.29 30.855 238.68

161.67 99.96 146.37 84.66 169.32 107.865 154.02 92.31

15.3 223.125 53.805 207.825 7.65 231.03 61.455 215.475

138.465 77.01 176.97 115.515 130.815 69.36 184.62 123.165

46.155 193.29 30.855 238.68 38.505 192.525 23.205 246.33

169.32 107.865 154.02 92.31 161.67 99.96 146.37 84.66

7.65 231.03 61.455 215.475 15.3 223.125 53.805 207.825

Third Step: Comparison

Outcome

Error Diffusion

Floyd - Steinberg Implementation:

outcome