Rotate an image 180 degrees without library functions

77 views (last 30 days)
I am tasked with rotating an image using a single line of Matlab code. I'm unsure how to do this without using built-in rotate functions. Any help or advice would be appreciated, thank you!
The function I am supposed to write has one input, that being the image, and expects a "results" output that stores the rotated image.
function result = image_rotation(image)
% insert one line of code here

Answers (2)

Image Analyst
Image Analyst on 5 Sep 2022
Hints: Look at the transpose operator -- the apostrophe. Also look at indexing with a negative 1 step.
[rows, columns, numColorChannels] = size(yourImage);
indexes = rows : -1 : 1;
Do not call your variable "image" since that is the name of an important built-in function.
Good luck with your homework.

James Tursa
James Tursa on 5 Sep 2022
Hint: Take a small example, rotate it 180 degrees, and see where the elements end up. Then consider how you might get that result with indexing into the original matrix.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by