| US 7,551,788 B2 | ||
| Digital image coding device and method for noise removal using wavelet transforms | ||
| Hayato Hagihara, Tokyo (Japan) | ||
| Assigned to NEC Corporation, Tokyo (Japan) | ||
| Filed on Jul. 02, 2003, as Appl. No. 10/610,592. | ||
| Claims priority of application No. 2002-194050 (JP), filed on Jul. 03, 2002. | ||
| Prior Publication US 2004/0006582 A1, Jan. 08, 2004 | ||
| Int. Cl. G06K 9/46 (2006.01); G06K 9/00 (2006.01) | ||
| U.S. Cl. 382—240 [382/252; 382/247; 382/232] | 9 Claims |
| 1. A device for coding a digital image signal inputted from an image capturing device based on wavelet transform, comprising:
a coefficient modeling section for converting wavelet coefficients into binary data composed of a plurality of bitplanes for
each code-block;
a replacement section for replacing a designated number of lower-order bitplanes of the plurality of bitplanes with zero to
produce modified binary data, wherein the designated number of low-order bitplanes is designated depending on a noise characteristic
of the image capturing device caused by a component of the image capturing device; and
an arithmetic coding section for coding bitplanes of the modified binary data.
|