Patent ID: 8373901
Filing Date: 2013-02-12
Classification: H04N

Abstract:
1. An image-processing apparatus multiplexing additional information on image information, the image-processing apparatus comprising: a first multiplexing unit that is configured to perform pseudo-halftone processing at a pseudo-halftone-processing time so that the image information is changed into a first quantization level of multi-level gradation and that is configured to multiplex first information of the additional information at the pseudo-halftone-processing time; and a second multiplexing unit that is configured to perform the pseudo-halftone processing so that the first quantization level subjected to the pseudo-halftone processing by the first multiplexing unit is changed into a second quantization level of gradation lower than the multi-level gradation and that is configured to multiplex second information of the additional information at the pseudo-halftone-processing time, wherein a frequency band where the first information is multiplexed by the first multiplexing unit is different from a frequency band where the second information is multiplexed by the second multiplexing unit, wherein the first multiplexing unit multiplexes the first information in a band of frequencies lower than a frequency used for the pseudo-halftone processing performed by the first multiplexing unit, and multiplexes the first information in a band of frequencies higher than a frequency used for the pseudo-halftone processing performed by the second multiplexing unit.