Definition of image blur?

Question

PHP

Hello, I am generating some pictures from a video and some of the pictures are blurry or poor quality. How can you technically determine that the picture is too blurry?

After googling, I applied this method https://stackoverflow.com/questions/28811959/how-c...
But I could not google what to do with the received numbers :)

Answer 1

Let me translate.
They propose to make the convolution by the Laplace transform . At the same time, get the standard deviation from the statistics .
This number will be higher for sharper images.
It is unlikely that you will find an easier way than, "feed the picture to the image manager and check one number."