Method, medium, and system effectively compressing and/or restoring binary images
AssigneeSamsung Electronics Co., Ltd.
InventorsSang-jo Lee, Si-hwa Lee, Do-hyung Kim
Life of this patent
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Abstract
A method, medium, and system effectively compressing and/or restoring binary images. By compressing pixel values making up a 2×2 block in an input image, using representative values representing the pixel values and a pattern of the pixel values represented by the representative values, it is possible to effectively compress and/or restore binary images having little similarities between pixel values. In addition, by extracting compressed values and a pattern of pixel values making up a 2×2 block in an image, from compressed data of the 2×2 block, and restoring pixel values using the compressed values and the pattern, it is possible to effectively restore binary images.
Claims19
An image compression method, comprising:
- identifying representative values of pixel values making up a block having a predetermined size in an image;
- identifying a pattern of the pixel values, as represented by the representative values;
- and
- compressing the pixel values using the representative values and the pattern.
An image compression method, comprising:
- compressing pixel values making up a block having a predetermined size in an image according to a plurality of predetermined image compression techniques;
- compressing the pixel values using representative values of the pixel values and a pattern of the pixel values, as represented by the representative values;
- selecting a mode from among a plurality of modes corresponding to the plurality of predetermined image compression techniques and a resultant image compression technique used in the compressing of the pixel values using the representative values based on a comparison of compressed results of the plurality of predetermined image compression techniques and the resultant image compression technique used in the compressing of the pixel values using the representative values;
- and
- generating a bit stream packet including mode data representing the selected mode, and compressed data, corresponding to the selected mode representing an indication of one of the compressed results of the plurality of predetermined image compression techniques and the resultant image compression technique used in the compressing of the pixel values using the representative values.
An image restoring method, comprising:
- extracting compressed values of pixel values making up a block having a predetermined size in an image embedded in compressed data of the block;
- extracting a pattern of the pixel values embedded in the compressed data;
- and
- restoring the pixel values using the compressed values and the pattern.
An image restoring method, comprising:
- extracting mode data and compressed data of a block having a predetermined size in an image from a bit stream packet;
- recognizing a mode indicating an image compression technique corresponding to the compressed data used to compress the compressed data, from among a plurality of image compression techniques, from the mode data;
- and
- selectively restoring pixel values making up the block corresponding to the compressed data using compressed values of the pixel values making up the block and a pattern of the pixel values extracted from the compressed data, according to the recognized mode.
Dependencies are inferred from the claim text.