How can I apply a natural logarithm to an image?

39 views (last 30 days)
%%4 image natural log test
%%apply natural log function on the image 'image' to get 'ln_image'
%%note: you need to use mat2gray to convert the format of the image
%also, change negative values to postivie for display purpose
%add instruction here
ln_image = ;
subplot(2,3, 5);
%use display image with scaled colors command (not imshow). put title 'natural log'
%add instructions here
imagesc(ln_image);
title('Natural Log');
  3 Comments
KALYAN ACHARJYA
KALYAN ACHARJYA on 26 Nov 2020
Edited: KALYAN ACHARJYA on 26 Nov 2020
@Lucaci Most members of this community are great, they are giving their precious time to help us. It is expected to take the suggestions in a positive way. Trust me, these people are very knowledgeable and they are guiding millions, like you and me.
Seems home work question, in such cases your own efforts are expected. If you have any specific question, let us know..?

Sign in to comment.

Accepted Answer

Image Analyst
Image Analyst on 26 Nov 2020
Did you try ln_image =log(mat2gray(image))?
By the way it's a terrible idea for them to tell you to use the word "image" for your variable name. image() is a built-in function. If there are any zeros in your image you should add 1 to the image before taking the log of it.

More Answers (0)

Categories

Find more on Image Processing Toolbox in Help Center and File Exchange

Community Treasure Hunt

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

Start Hunting!

Translated by