Patent ID: 8244047
Filing Date: 2012-08-14
Classification: G06T,H04N

Abstract:
1. An image compression unit, comprising: a preprocessing unit that performs preprocessing for converting a first bit string representing an intensity of each of a plurality of pixels of which image data is composed into a second bit string, a number of digits of which is smaller than a number of digits of the first bit string, based on a predetermined region included in the image data and a first attribute information for identifying an attribute of the predetermined region, with the preprocessing being associated with the predetermined region of the image data; and a bit string conversion unit which converts the second bit string into a third bit string based on distribution of a frequency of appearance of the intensity in the second bit string and the first attribute information such that, for the pixel having a higher frequency of appearance of the intensity, a number of bit planes on which data of the pixel appear is less.