Patent ID: 7127117
Filing Date: 2006-10-24
Classification: G06T

Abstract:
1. An image compression apparatus comprising: a tile specifying section specifying rectangular tiles having an arbitrary size with respect to an image; an image dividing section dividing the image using the specified rectangular tiles; a bit-plane decomposing section decomposing each of the specified tiles dividing the image into bit-planes; a bit-plane ordering section ordering the bit-planes decomposing each of the specified tiles depending on a coding sequence; a layer forming section forming layers by the ordered bit-planes; and a suppressing section suppressing a quantization rate of a region of interest low relative to other regions of the image by including a bit-plane of said region of interest in a higher layer of the layers formed by the ordered bit-planes than the other regions without shifting the bit-planes themselves, wherein said suppressing section suppresses the quantization rate of a region in a vicinity of a tile boundary, with respect to a bit-plane of a region separated from the tile boundary and having a relatively higher quantization rate, so as to be included in a higher layer of the layers formed by the ordered bit-planes without shifting the bit-planes themselves.