The below code is an automated process that removes the black noise from the white thumbprint ridges in the thumbprint.png$.$

How would you code another automated process to remove the white noise on the background?

Code to remove black noise from white thumbprint.png:

$\%$ Load the image

I $=$ imread$(\text{'}$thumbprint$.$png$\text{'})$;

$\%$ Create the marker image

F $=$ ~imclearborder$($~I$)$;

$\%$ Create the mask image

G $=$ ~I;

$\%$ Perform morphological reconstruction by dilation

H $=$ imreconstruct$($F$,$ G$)$;

$\%$ Obtain the filled image

H$\_$filled $=$ ~H;

$\%$ Display the original and filled images

figure;

subplot$(1,2,1)$;

imshow$($I$)$;

title$(\text{'}$Original Image'$)$;

subplot$(1,2,2)$;

imshow$($H$\_$filled$)$;

title$(\text{'}$Filled Image'$)$;