Method and apparatus of obtaining high resolution image using multi-band combination filters

摘要

Provided are an apparatus and method of obtaining a high resolution image using multi-band combination filters. The apparatus includes a high frequency extraction unit to extract a high frequency image from a low resolution input image through filtering operations performed in parallel, a high frequency expansion unit to expand the high frequency image to generate an expanded high frequency image, an image expansion unit to expand the low resolution input image to generate an expanded input image, and an image combination unit to combine the expanded high frequency image and the expanded input image.

主权项

1. An apparatus for obtaining a high resolution image, the apparatus comprising:
a processor comprising: a high frequency extraction unit to extract a high frequency image from a low resolution input image through filtering operations performed in parallel wherein the high frequency extraction unit comprises a plurality of filters to filter the low resolution input image using a predetermined plurality of frequency bands, which are different bands from each other, to extract filtered images; a high frequency expansion unit to expand the high frequency image to generate an expanded high frequency image; an image expansion unit to expand the low resolution input image to generate an expanded input image; and an image combination unit to combine the expanded high frequency image and the expanded input image, wherein the predetermined plurality of frequency bands indicate a visually sensitive part to a human, and wherein the high frequency extraction unit further comprises: a plurality of weight assignment units to assign a predetermined weight to each of the filtered images, wherein each predetermined weight has a weight value which increases as the frequency bands used for filtering images become more visually sensitive to the human; and a high frequency combination unit to combine the filtered images to which the predetermined weight is assigned to generate the high frequency image, and wherein the high frequency extraction unit, the image expansion unit, the image combination unit, the plurality of weight assignment units, and the high frequency combination unit use at least one processor.