Logarithmic value scaling in image-function

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Tim Hilt
Tim Hilt 2019-10-10
回答： thoughtGarden 2019-10-10
I have some files, that contain Fourier-transformed data, that is collected over time. If it weren't already transformed, i would use a spectrogram to visualize it, but since that is not an option i was using image().
I'm looking for a way to get logarithmic color scaling for the values that i feed to the function, but couldn't find it.
Can someone help me out?

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回答（1 个）

thoughtGarden
thoughtGarden 2019-10-10
Are trying to scale the colors so that changes are exaggerated? Here is an example of what you could do:
C = [1 2 3; 4 5 6; 7 8 9];
figure(1);
image(C);
C10 = 10.^C;
figure(2);
image(C10);
This takes your colors and scales them logrithmically.

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