Birch, Stewart, Kolasch & Birch, LLP
Image coding device, and image decoding device using irreversable coding without mask image
An object of the invention is to provide an image coding device and an image decoding device enabling a transmitting color function through irreversible coding by performing the processing to reduce the occurrence of noises at the encoder's end without using a mask image. A grayscale shift unit shifts the grayscale of a transmitting color of an original image, after which a coding unit performs irreversible coding on the image. A transmitting color judging unit judges the transmitting color of a decoded image based on luminance information alone, and an up-sampling unit restores an outline of an object faithfully without being accompanied by deterioration in resolution resulted from the sub-sampling. It is thus possible to obtain a high-quality image with fewer noises.
Sharp Kabushiki Kaisha
H H H
H04N H04N H04N
inventional inventional inventional
Hideaki
Yamada