Fig. 6: Defocused images of objects with different levels of blurring.
From: Fast autofocusing based on single-pixel moment detection
a–d A sequence of blurred images of img1, img2, img3, and img4, respectively. σx and σy are the variance of the 2D Gaussian point spread function in the horizontal and vertical directions, respectively. As σx and σy increases, the images become more blurred.
