DIGITAL ZOOM METHODS AND SYSTEMS

摘要

In some cases, conventional digital zoom techniques can lead to poor quality images. Disclosed are systems and methods for improving the quality of images generated by digital zoom. For example, in some embodiments, a parallel structure is utilized where an image is passed through a sharpener and a 2D directional upscaler at the same time. Upscaling operations are then performed on the sharpened image. The upscaled sharpened image is added to the output of the 2D directional upscaler to produce an enhanced image.

主权项

1. An imaging system, comprising:
an image upscaling module configured to receive an input image comprising a plurality of pixels that have corresponding pixel values, and to generate an upscaled output image by enlarging the input image to a defined size and interpolating a defined number of pixels between each pixel of the input image; a sharpening module configured to generate a sharpened image by amplifying differences in pixel values of the pixels of the input image; a sharpening upscaling module configured to:
upscale the sharpened image by enlarging the sharpened image to the defined size and interpolating the defined number of pixels between each pixel of the sharpened image,generate a first delta image, each pixel of the first delta image corresponding to each pixel of the upscaled output image, and each pixel of the first delta image comprising a first change in pixel value based on at least the upscaled sharpened image and a first gain factor,generate a second delta image, each pixel of the second delta image corresponding to each pixel of the upscaled output image, and each pixel of the second delta image comprising a second change in pixel color based on at least the upscaled sharpened image and a second gain factor, andgenerate a third delta image, each pixel of the third delta image corresponding to each pixel of the upscaled output image, and each pixel of the third delta image comprising a third change in pixel value based on at least the first delta image and the second delta image; and a processing module configured to generate an enhanced image based on adding the pixel values of the corresponding pixels of the upscaled image and the third delta image.