Selecting a Layer: In order to slice off one of the color layers of the image we can use the

following command. This command assumes that the image has been loaded into a variable

called IMG.

$R=$IMG$($:$,$:$,1)$;

This example will slice off the first layer which should be the red color layer as we have seen in

the previous challenge and saves it to a variable called R$.$ However you should notice that $R$ is

just a $2$D matrix at the moment. MATLAB will interpret this as a grayscale image rather than

being a red color layer. In order to display just the red layer, we will need to create a $3$D matrix

with the values in the blue layer and the green layer being set to $0.$

IMG, $1),$ size$($IMG$,2))$;

just$\_$red $=$cat$(3,R,a,a)$;

just$\_$green $=$cat$(3,a,G,a)$;

just$\_$blue $=$cat$(3,a,a,B)$;

Displaying a Single Layer: First we will create a $2$D array of zeros with the same

dimensions$/$resolution as the image that we loaded. Then we use the prior example to select

the red layer and save it in R$.$ Then we create a $3$D matrix $($which will be interpreted as a color

image$)$ and simply set the green and blue layers to be the $0$ matrix that we created. This

essentially recreates just the red layer of the image. These steps can be repeated to display just

the green layer and the blue layers.

cat$()$ A function in MATLAB that will concatenate arrays. The first parameter is $3$ because we

want to create a $3$D array, the next three parameters are the color layers that we want to set.

TASK: PROGRAMMING$/$PLOTTING Take any image of your choice and load it into MATLAB.

Then using the example above, separate the image into its distinct red, green, and blue layers.

Save these layers to some variables that you can use later. Use imshow$()$ to display the layers

and put screenshots in the write$-$up$.$