APPARATUS AND METHOD OF COMPRESSING AND RESTORING IMAGE USING FILTER INFORMATION

摘要

Provided is method and apparatus of compressing and restoring an image using filter information. The image compression apparatus may generate a reduced image by sampling an input image, determine filter information based on the input image and a decoded reduced image, and code the filter information and the decoded reduced image. Accordingly, a deterioration in an image quality may be prevented in transmitting the image using a limited bandwidth.

主权项

1. An image compression apparatus, comprising:
a processor configured to:
generate a reduced image with a reduced resolution by sampling an input image,divide the reduced image into a plurality of blocks,calculate pixel value errors between the plurality of blocks,select, as a representative block, one block, which is one of the plurality of blocks and has the smallest pixel value error,determine filter information including at least one interpolation coefficient with respect to the representative block based on the input image and the reduced image, andgenerate a bitstream by coding the reduced image and the determined filter information; and memory to store the input image.