1
Guy Cote, Jeffrey E Frederiksen: System and method for sharpening image data. Apple, Fletcher Yoder PC, October 23, 2012: US08294781 (24 worldwide citation)

Various techniques relating to image sharpening are provided. In one embodiment, a luminance image is obtained based upon image data acquired by an image sensor. A multi-scale unsharp mask, which may include at least two Gaussian filters of difference radii, is applied to the luminance image to dete ...


2
Guy Cote, Jeffrey E Frederiksen: System and method for sharpening image data. Apple, April 21, 2011: US20110090370-A1

Various techniques relating to image sharpening are provided. In one embodiment, a luminance image is obtained based upon image data acquired by an image sensor. A multi-scale unsharp mask, which may include at least two Gaussian filters of difference radii, is applied to the luminance image to dete ...