Manipulating a image of a yellow car.

I have a JPG image of a yellow car and one of the task was to flip it 3 different ways which I did. The only pickle I'm is is that somehow output isn't the same as the exspected output. I have no idea what i missed out and becasue of that I can't produce the later wanted outputs. Any help is really appriciated. I have includedthe images (ouputs) that include my output and exspected output.

My Output:

Exspected output:

[Star Strider]

It might help if you could also post the original image of the car (the one you began with), as well as a description of what you are supposed to do with it (since this seems to be a homework assignment), and your code.

[Oscar Tsang]

It a assignment, I don't know what step i could of missed not to get the yellow background on the flipped cars but i have managed to flip them.

And my ocde so far is:

%% Question 2

% clear all % Clear MATLAB Workspace Memory

close all % Close all Figures and Drawings

clc % Clear MATLAB Command Window History

A = imread('YellowCar.jpg');

rgb2gray(A)

%% Question 2A

% clear all % Clear MATLAB Workspace Memory

close all % Close all Figures and Drawings

clc % Clear MATLAB Command Window History

size(A)

%% Question 2B

% clear all % Clear MATLAB Workspace Memory

close all % Close all Figures and Drawings

clc % Clear MATLAB Command Window History

car = [A fliplr(A); flip(A) flip(fliplr(A))]

imshow(car)

---------------------------------------------------------------------------------------------------------

Original image of the car:

What I need to do:

[madhan ravi]

where is your code and attach YellowCar.jpg file?

[Oscar Tsang]

Here's my code. I have attached it as a .m file

Answer 1

[Star Strider]

The yellow background is relatively straightforward:

A = imread('Yellow Car.jpeg');
GrayCar = rgb2gray(A);
YellowBackground = uint8(cat(3, ones(size(GrayCar)), ones(size(GrayCar)), zeros(size(GrayCar))));
YellowCarWithYellowBackground = GrayCar .* YellowBackground;
imshow(YellowCarWithYellowBackground)

I named the image file ‘Yellow Car.jpeg’. Change that if yours is different. The rest of my code should work.

I notice the the wheels, side moulding, and windows are different colours. You might have to segment the image and make those changes if they’re important.

[Oscar Tsang]

How would I add the purple stripe?? Would it be during the process of me flipping the cars I combine the first 2 columns in the car matrix (A fliplr(A)) into a sigle matrix then add a matrix filled with zeros inbetween, make that colour purple somehow then combine the last 2 matix's together (flip(A) flip(fliplr(A)) ) into a single matrix then turn that stripe into yellow afterwards???

car1 = [A fliplr(A)]
car2 =[flip(A) flip(fliplr(A))]

[Star Strider]

I would do it essentially the same way as I created the yellow background.

Experiment with this:

PurpleSquare = uint8(cat(3, ones(50), zeros(50), ones(50))*128);
imshow(PurpleSquare)

[Oscar Tsang]

Got it, but the only trouble is that im having trouble to put that purple strip in between the cars and rehsaping it.

[Star Strider]

Since that appears to be part of the assignment, I will defer to you to solve it. Think of how you might do it if it were on paper, and you want to insert the purple (later yellow) stripe between the first and second row of cars.

You might find some inspiration in consulting the vertcat function.