Patent ID: 8144998
Filing Date: 2012-03-27
Classification: H04N

Abstract:
1. An image processing apparatus for processing compressed image data generated by segmenting image data into blocks and using a compression method which applies a frequency transformation to each block, the image processing apparatus comprising: a decoder configured to decode the compressed image data and output decoded data; a block classification unit configured to classify blocks according to frequency coefficients in the blocks decoded by the decoder; and a color separated data generator configured to generate color separated data in block units based on the decoded data decoded by the decoder and a result of classification by the block classification unit, wherein the block classification unit classifies the blocks as being at least one of (a) a block A composed of only a DC component, (b) a block B composed only of a DC component and horizontal frequency components, and (c) a block C composed only of a DC component and vertical frequency components, and wherein the color separated data generator generates color separated data for pixels of a single color in the block and outputs the generated color separated data for all pixels in the block, for a block classified as being block A, the color separated data generator generates color separated data for a single stripe of pixels in the block and repeatedly outputs the generated color separated data in a column direction of the same pixel value of the block, for a block classified as being block B, and the color separated data generator generates color separated data for a single stripe of pixels in the block and repeatedly outputs the generated color separated data in a row direction of the same pixel value of the block, for a block classified as being block C.