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 uint$8()$ 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.

Script ${?}^{}$

im $=$ imread$(\text{'}$cracked$\_$wall.JPG$\text{'})$;

im $=1$ imread$(\text{'}$ cracked$\_\_$ im$\_$gray $=$ rgb$2$gray$($im$)$ figure;

figure;

subplot $(1,3,1)$ imshow$($im gray$)$

imshow$(\text{'}$im$\_$gray$)$

im$\_$ratio $=\frac{\text{d}\text{o}\text{u}\text{b}\text{l}\text{e}(im(\text{:},\text{:},1))+\text{d}\text{o}\text{u}\text{b}\text{l}\text{e}(im(\text{:},\text{:},2))+\text{d}\text{o}\text{u}\text{b}\text{l}\text{e}(im(\text{:},\text{:},3))}{3}$;

subplot $(1,3,2)$

imshow $($im$\_$ratio, $[])$

title$(\text{'}$im$$ratio Image'$)$

threshold $=1\mathrm{.}9$

im$\_$out $=$ im$\_$ratio $>$ threshold

subplot $(1,3,3)$

title$(\text{'}$Filtered Image $($Red Cracks$)\text{'})$

figure

imshow $($im $.*$ uint$8($cat $(3,$ im$\_$out, im$\_$out, im$\_$out$)))$

imshow$($im $.*$ uint$8($cat$(3,$ im$\_$out, im$\_$out, im$\_$out$)))$ title$(\text{'}$Original Image with Red Cracks Highlighted'$)$

Previous Assessment: $2$ of $4$ Tests Passed $(50\%)$

Correct im$\_$gray

$($ Correct im$\_$ratio

Variable im$\_$ratio has an incorrect value.

Incorrect im$\_$ratio. Remember that $i{m}_{-}$ratio is the ratio of the red channel over the mean of the three channels!

$($ Correct im$\_$out

Variable im$\_$out must be of data type double. It is currently of type logical$.$ Check where the variable is assigned a value.

Incorrect im$\_$out. Remember that im$\_$out only show elements with im$\_$ratio $>1\mathrm{.}9$