Create a filter with a threshold value to show only the red cracks.

Write a script which imports the image $($cracked$\_$wall.jpg$)$ and filter the image:

Hint: the resulting image should have a single channel $($it will be a grayscale image$).$ You may also have to convert your uints$()$ matrix into the datatype double$()$ before doing this.$|$

Hint: there will be other parts of the image that still shows. We call this noise and that is acceptable.