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correct ghosting

asked 2017-02-20 15:11:11 -0600

marcov gravatar image

updated 2017-02-21 11:15:19 -0600

I have an application in which I have to process images taken through a mirror. The camera and mirror positions are fixed, and the object is always in the same position with respect to the mirror. The problem is that I get a ghosting effect because the image is also reflected by the transparent surface of the mirror.

I will try to get a first surface mirror for my application, but I wonder if this ghosting effect can be corrected by software. Any hint would be appreciated (a paper, algorithm, anything). I believe this should be possible, since the camera and mirror are both fixed, and the object is always at the same distance from the mirror, but I don't know where to start looking.

Thank you in advance.


I have added a couple of pictures of a grid pattern that show the ghosting effect.



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Can you insert an image in your post?

LBerger gravatar imageLBerger ( 2017-02-20 15:13:07 -0600 )edit

These are a couple of pictures of a grid pattern taken using the mirror. Any advice would be appreciated. Thanks!



marcov gravatar imagemarcov ( 2017-02-21 11:12:41 -0600 )edit

I don't know easy answer. In audio it is well known : echo .

LBerger gravatar imageLBerger ( 2017-02-21 13:59:48 -0600 )edit

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answered 2017-02-22 02:17:55 -0600

pi-null-mezon gravatar image

Do you have a linear polarizer filter? As glass of the mirror is a dielectric material, the light reflected by the glass surface should be partially polarized, at the same time the light reflected by the mirror's substract (wich is metallic) should not be polarized. So, you can try to cut off those ghosting reflection by means of polarization filter, that should be mount on top of your camera lens.

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Thank you for your answer. I will try with a polarized filter.

marcov gravatar imagemarcov ( 2017-02-28 11:02:58 -0600 )edit

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Asked: 2017-02-20 15:11:11 -0600

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Last updated: Feb 22 '17