How to use PSF with Blind Deconvolution Algorithm

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Hello,

I found an Image with a motion blur and want to deblur it, without knowing its PSF. I have read these below:

   * Understanding Deblurring
    * Deblurring with the Wiener Filter
    * Deblurring with a Regularized Filter
    * Deblurring with the Lucy-Richardson Algorithm
    * Deblurring with the Blind Deconvolution Algorithm
    * Creating Your Own Deblurring Functions
    * Avoiding Ringing in Deblurred Images

And figured out that I need to use the Blind Deconvolution Algorithm to deblur the image. I'm understanding the Blind Deconvolution Algorithm demo in Matlab, but their using a existing PSF.

Can someone explain me how to approach my PSF problem?

Best regards, Michael ten Den

*The image: https://p.twimg.com/ApgZrYtCEAIysL-.jpg