How to get back the original image?

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RAVI KUMAR
RAVI KUMAR 2016-8-24
评论： Thorsten 2016-8-24
If let say I have an image I(x,y), and then it is transformed into a phase function as: I2(x,y)=exp(i*pi*I(x,y)); then how can I get back the image I(x,y) from I2(x,y)?

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回答（1 个）

Thorsten
Thorsten 2016-8-24
I = rand(10); % sample data
I2 = exp(1i*pi*I);
I1 = real(log(I2)/pi/1i);
  2 个评论
RAVI KUMAR
RAVI KUMAR 2016-8-24
First of all, Thank you sir but its okay with random numbers; the problem is if we use a gray scale image (for example "lena.jpg") it will not give the result.
Thorsten
Thorsten 2016-8-24
Why not?
I tested with
I = im2double(imread('cameraman.tif'));
and it worked fine.

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