The restoration of large blur image based on POCS algorithm
2010
When we obtain some static images by a very high speed camera, the images exist large blur, and the PSF may exceed
the half size of image resolution which we call ultra-half-length-blur. All the experiments are based on images which are
256 pixels by 256 pixels. Firstly, we consider horizontal blur of images between 50 and 60 pixels, then, we increase the
length of horizontal blur to 100 pixels which is close to the half length of horizontal resolution of image, the blur images
exist pixel alias in a certain extent, and the POCS algorithm can restore these blur images as well. For the condition of
ultra-half-length-blur which exists more than 150 pixels of horizontal blur, we can not distinguish details in all the blur
images, and can not restore the high-resolution image by traditional POCS algorithm. Therefore, we establish a PSF
model of ultra-half-length-blur, we use different interpolations for the SR estimation at first, then we apply two POCS
algorithms of ultra-half-length-blur PSF model, one is pixel-by-pixel, the other is every-other-pixel. Finally, we identify
the ultimate performance of POCS algorithm by these large blur experiments.
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