%%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');
MATLAB: How to apply a natural logarithm to an image
image processingnatural logarithm
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